./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya --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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:55:25,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:55:25,495 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:55:25,500 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:55:25,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:55:25,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:55:25,526 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:55:25,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:55:25,527 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:55:25,528 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:55:25,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:55:25,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:55:25,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:55:25,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:55:25,531 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:55:25,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:55:25,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:55:25,532 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:55:25,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:55:25,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:55:25,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:55:25,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:55:25,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:55:25,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:55:25,540 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:55:25,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:55:25,540 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:55:25,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:55:25,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:55:25,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:55:25,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:55:25,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:55:25,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:55:25,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:55:25,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:55:25,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:55:25,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:55:25,544 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:55:25,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:55:25,544 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:55:25,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:55:25,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:55:25,545 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_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2023-11-29 00:55:25,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:55:25,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:55:25,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:55:25,798 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:55:25,799 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:55:25,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-29 00:55:28,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:55:28,751 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:55:28,752 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-29 00:55:28,758 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/data/a0b6e8493/9b2758044cb64c4bb3689eda3406a68f/FLAG509e8c3f1 [2023-11-29 00:55:29,128 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/data/a0b6e8493/9b2758044cb64c4bb3689eda3406a68f [2023-11-29 00:55:29,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:55:29,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:55:29,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:55:29,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:55:29,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:55:29,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc56bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29, skipping insertion in model container [2023-11-29 00:55:29,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,158 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:55:29,283 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_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2023-11-29 00:55:29,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:55:29,313 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:55:29,323 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_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2023-11-29 00:55:29,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:55:29,345 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:55:29,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29 WrapperNode [2023-11-29 00:55:29,346 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:55:29,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:55:29,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:55:29,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:55:29,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,377 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-11-29 00:55:29,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:55:29,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:55:29,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:55:29,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:55:29,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,403 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:55:29,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,416 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:55:29,417 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:55:29,418 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:55:29,418 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:55:29,419 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (1/1) ... [2023-11-29 00:55:29,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:55:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:29,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:55:29,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:55:29,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:55:29,488 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:55:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:55:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:55:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:55:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:55:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:55:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:55:29,555 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:55:29,557 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:55:29,713 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:55:29,737 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:55:29,737 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:55:29,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:55:29 BoogieIcfgContainer [2023-11-29 00:55:29,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:55:29,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:55:29,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:55:29,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:55:29,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:55:29" (1/3) ... [2023-11-29 00:55:29,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41418bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:55:29, skipping insertion in model container [2023-11-29 00:55:29,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:29" (2/3) ... [2023-11-29 00:55:29,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41418bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:55:29, skipping insertion in model container [2023-11-29 00:55:29,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:55:29" (3/3) ... [2023-11-29 00:55:29,748 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2023-11-29 00:55:29,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:55:29,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:55:29,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:55:29,821 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;@58342ec2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:55:29,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:55:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 00:55:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 00:55:29,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:29,832 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:29,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:29,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 67099435, now seen corresponding path program 1 times [2023-11-29 00:55:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:29,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315147052] [2023-11-29 00:55:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:29,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315147052] [2023-11-29 00:55:29,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:55:29,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159621127] [2023-11-29 00:55:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:29,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:29,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:55:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:30,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:55:30,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:55:30,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159621127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:30,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:55:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720105953] [2023-11-29 00:55:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:30,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:55:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:55:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:55:30,137 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:55:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:30,164 INFO L93 Difference]: Finished difference Result 62 states and 104 transitions. [2023-11-29 00:55:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:55:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-29 00:55:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:30,174 INFO L225 Difference]: With dead ends: 62 [2023-11-29 00:55:30,174 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 00:55:30,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:55:30,181 INFO L413 NwaCegarLoop]: 39 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, 39 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 [2023-11-29 00:55:30,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:55:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 00:55:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 00:55:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 00:55:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-29 00:55:30,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 28 [2023-11-29 00:55:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:30,218 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-29 00:55:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:55:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-29 00:55:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 00:55:30,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:30,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:30,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:30,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:30,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:30,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1772608446, now seen corresponding path program 1 times [2023-11-29 00:55:30,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:30,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338984920] [2023-11-29 00:55:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:30,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:30,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:30,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625713540] [2023-11-29 00:55:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:30,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:30,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:30,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:30,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:55:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:30,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:55:30,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:55:30,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338984920] [2023-11-29 00:55:30,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625713540] [2023-11-29 00:55:30,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625713540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:30,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:30,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:55:30,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359962381] [2023-11-29 00:55:30,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:55:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:55:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:30,586 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 00:55:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:30,685 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-11-29 00:55:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:55:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-11-29 00:55:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:30,687 INFO L225 Difference]: With dead ends: 49 [2023-11-29 00:55:30,688 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 00:55:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:55:30,690 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:30,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:55:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 00:55:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2023-11-29 00:55:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 00:55:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-11-29 00:55:30,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2023-11-29 00:55:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:30,703 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-11-29 00:55:30,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 00:55:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-11-29 00:55:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:55:30,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:30,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:30,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:30,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:55:30,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:30,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1072684582, now seen corresponding path program 1 times [2023-11-29 00:55:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553834761] [2023-11-29 00:55:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:30,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:30,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577880152] [2023-11-29 00:55:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:30,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:30,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:30,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:55:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:30,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:55:30,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:55:31,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553834761] [2023-11-29 00:55:31,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577880152] [2023-11-29 00:55:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577880152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:31,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:31,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:55:31,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051917200] [2023-11-29 00:55:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:31,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:55:31,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:55:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:55:31,131 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 00:55:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:31,252 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-11-29 00:55:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:55:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-11-29 00:55:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:31,254 INFO L225 Difference]: With dead ends: 48 [2023-11-29 00:55:31,255 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 00:55:31,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:55:31,257 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:31,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:55:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 00:55:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-29 00:55:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 00:55:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-11-29 00:55:31,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2023-11-29 00:55:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:31,286 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-11-29 00:55:31,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 00:55:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-11-29 00:55:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:55:31,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:31,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:31,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:55:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:55:31,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:31,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash 581538888, now seen corresponding path program 1 times [2023-11-29 00:55:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19690605] [2023-11-29 00:55:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:31,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:31,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460223372] [2023-11-29 00:55:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:31,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:31,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:55:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:31,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:55:31,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:55:31,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:55:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19690605] [2023-11-29 00:55:31,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460223372] [2023-11-29 00:55:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460223372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:31,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:31,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-29 00:55:31,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11873870] [2023-11-29 00:55:31,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:31,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:55:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:55:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:55:31,714 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:55:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:31,916 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2023-11-29 00:55:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:55:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-11-29 00:55:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:31,918 INFO L225 Difference]: With dead ends: 98 [2023-11-29 00:55:31,918 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 00:55:31,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:55:31,920 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:31,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 222 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:55:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 00:55:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2023-11-29 00:55:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:55:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2023-11-29 00:55:31,943 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 34 [2023-11-29 00:55:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:31,943 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2023-11-29 00:55:31,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:55:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2023-11-29 00:55:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 00:55:31,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:31,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:31,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:55:32,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:32,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:32,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:32,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1534715754, now seen corresponding path program 1 times [2023-11-29 00:55:32,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:32,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724970049] [2023-11-29 00:55:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:32,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:32,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101984195] [2023-11-29 00:55:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:32,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:32,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:32,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:32,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:55:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:32,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:55:32,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:55:32,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 00:55:32,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724970049] [2023-11-29 00:55:32,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101984195] [2023-11-29 00:55:32,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101984195] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:32,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:55:32,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-29 00:55:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856048183] [2023-11-29 00:55:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:55:32,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:55:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:55:32,601 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:32,681 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2023-11-29 00:55:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:55:32,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-29 00:55:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:32,683 INFO L225 Difference]: With dead ends: 74 [2023-11-29 00:55:32,683 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 00:55:32,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:55:32,684 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:32,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:55:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 00:55:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-11-29 00:55:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:55:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2023-11-29 00:55:32,706 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 37 [2023-11-29 00:55:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:32,707 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2023-11-29 00:55:32,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2023-11-29 00:55:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 00:55:32,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:32,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:32,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:55:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:32,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:32,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1190433772, now seen corresponding path program 1 times [2023-11-29 00:55:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:32,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591218592] [2023-11-29 00:55:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:32,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:32,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754019091] [2023-11-29 00:55:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:32,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:32,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:32,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:55:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:32,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:55:32,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:55:33,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 00:55:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591218592] [2023-11-29 00:55:33,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754019091] [2023-11-29 00:55:33,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754019091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:33,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:33,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-29 00:55:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610684763] [2023-11-29 00:55:33,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:33,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:55:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:55:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:55:33,321 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 00:55:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:33,651 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2023-11-29 00:55:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:55:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-11-29 00:55:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:33,653 INFO L225 Difference]: With dead ends: 113 [2023-11-29 00:55:33,653 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 00:55:33,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:55:33,655 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:33,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 297 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:55:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 00:55:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2023-11-29 00:55:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 00:55:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2023-11-29 00:55:33,681 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 37 [2023-11-29 00:55:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:33,681 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2023-11-29 00:55:33,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 00:55:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2023-11-29 00:55:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 00:55:33,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:33,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:33,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:33,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:33,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1246105370, now seen corresponding path program 1 times [2023-11-29 00:55:33,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:33,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630922501] [2023-11-29 00:55:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:33,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:33,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489565188] [2023-11-29 00:55:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:33,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:55:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:33,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:55:33,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:55:34,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:38,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:38,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630922501] [2023-11-29 00:55:38,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:38,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489565188] [2023-11-29 00:55:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489565188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:38,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:55:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 00:55:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316556240] [2023-11-29 00:55:38,364 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:38,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:55:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:55:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-11-29 00:55:38,365 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:55:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:38,636 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2023-11-29 00:55:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:55:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2023-11-29 00:55:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:38,638 INFO L225 Difference]: With dead ends: 113 [2023-11-29 00:55:38,638 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 00:55:38,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-11-29 00:55:38,640 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:38,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 162 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:55:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 00:55:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2023-11-29 00:55:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 75 states have internal predecessors, (93), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-29 00:55:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 150 transitions. [2023-11-29 00:55:38,668 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 150 transitions. Word has length 42 [2023-11-29 00:55:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:38,668 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 150 transitions. [2023-11-29 00:55:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:55:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 150 transitions. [2023-11-29 00:55:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 00:55:38,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:38,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:38,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:55:38,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:38,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:38,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1174265188, now seen corresponding path program 1 times [2023-11-29 00:55:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:38,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824341235] [2023-11-29 00:55:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:38,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:38,886 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38688755] [2023-11-29 00:55:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:38,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:38,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:38,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:55:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:38,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:55:38,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 00:55:39,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824341235] [2023-11-29 00:55:39,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38688755] [2023-11-29 00:55:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38688755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:39,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:55:39,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 00:55:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827492014] [2023-11-29 00:55:39,173 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:55:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:55:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:39,174 INFO L87 Difference]: Start difference. First operand 110 states and 150 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:39,412 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2023-11-29 00:55:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:55:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-29 00:55:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:39,415 INFO L225 Difference]: With dead ends: 176 [2023-11-29 00:55:39,415 INFO L226 Difference]: Without dead ends: 174 [2023-11-29 00:55:39,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:55:39,416 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:39,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 237 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:55:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-29 00:55:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2023-11-29 00:55:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 112 states have internal predecessors, (142), 49 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 00:55:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2023-11-29 00:55:39,451 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 42 [2023-11-29 00:55:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:39,452 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2023-11-29 00:55:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2023-11-29 00:55:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:55:39,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:39,453 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:39,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:55:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:39,659 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 225223382, now seen corresponding path program 1 times [2023-11-29 00:55:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494542734] [2023-11-29 00:55:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:39,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585007442] [2023-11-29 00:55:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:39,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:39,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:39,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:39,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:55:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:39,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:55:39,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 00:55:39,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494542734] [2023-11-29 00:55:39,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585007442] [2023-11-29 00:55:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585007442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:39,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:39,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:55:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392063464] [2023-11-29 00:55:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:55:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:55:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:39,784 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 00:55:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:39,906 INFO L93 Difference]: Finished difference Result 248 states and 373 transitions. [2023-11-29 00:55:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:55:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-29 00:55:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:39,910 INFO L225 Difference]: With dead ends: 248 [2023-11-29 00:55:39,911 INFO L226 Difference]: Without dead ends: 246 [2023-11-29 00:55:39,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:55:39,912 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:39,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 152 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:55:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-29 00:55:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2023-11-29 00:55:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 125 states have (on average 1.248) internal successors, (156), 137 states have internal predecessors, (156), 93 states have call successors, (93), 8 states have call predecessors, (93), 8 states have return successors, (92), 81 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-29 00:55:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 341 transitions. [2023-11-29 00:55:39,972 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 341 transitions. Word has length 47 [2023-11-29 00:55:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:39,972 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 341 transitions. [2023-11-29 00:55:39,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 00:55:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 341 transitions. [2023-11-29 00:55:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:55:39,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:39,974 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:39,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:55:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:40,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:40,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1560107220, now seen corresponding path program 1 times [2023-11-29 00:55:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562620044] [2023-11-29 00:55:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:40,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:40,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167929614] [2023-11-29 00:55:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:40,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:40,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:55:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:40,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:55:40,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:55:40,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:44,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562620044] [2023-11-29 00:55:44,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:44,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167929614] [2023-11-29 00:55:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167929614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:44,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:55:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 00:55:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451259215] [2023-11-29 00:55:44,721 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:55:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:55:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2023-11-29 00:55:44,723 INFO L87 Difference]: Start difference. First operand 227 states and 341 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:55:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:45,649 INFO L93 Difference]: Finished difference Result 306 states and 464 transitions. [2023-11-29 00:55:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:55:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2023-11-29 00:55:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:45,654 INFO L225 Difference]: With dead ends: 306 [2023-11-29 00:55:45,654 INFO L226 Difference]: Without dead ends: 304 [2023-11-29 00:55:45,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2023-11-29 00:55:45,656 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:45,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 307 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:55:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-29 00:55:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 268. [2023-11-29 00:55:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 155 states have internal predecessors, (174), 117 states have call successors, (117), 10 states have call predecessors, (117), 10 states have return successors, (116), 102 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-29 00:55:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 407 transitions. [2023-11-29 00:55:45,712 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 407 transitions. Word has length 47 [2023-11-29 00:55:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:45,713 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 407 transitions. [2023-11-29 00:55:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:55:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 407 transitions. [2023-11-29 00:55:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:55:45,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:45,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:45,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:55:45,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:55:45,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:45,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash -860263338, now seen corresponding path program 2 times [2023-11-29 00:55:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:45,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135344552] [2023-11-29 00:55:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:45,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:45,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:45,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374404851] [2023-11-29 00:55:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:55:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:45,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:45,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:45,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:55:45,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:55:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:45,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:55:45,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:55:45,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:45,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:45,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135344552] [2023-11-29 00:55:45,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:45,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374404851] [2023-11-29 00:55:45,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374404851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:45,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:45,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:55:45,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469852034] [2023-11-29 00:55:45,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:45,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:55:45,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:45,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:55:45,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:55:45,999 INFO L87 Difference]: Start difference. First operand 268 states and 407 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:46,112 INFO L93 Difference]: Finished difference Result 364 states and 551 transitions. [2023-11-29 00:55:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:55:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-11-29 00:55:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:46,115 INFO L225 Difference]: With dead ends: 364 [2023-11-29 00:55:46,115 INFO L226 Difference]: Without dead ends: 199 [2023-11-29 00:55:46,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:46,118 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:46,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 155 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:55:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-29 00:55:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 173. [2023-11-29 00:55:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 103 states have internal predecessors, (112), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 00:55:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 249 transitions. [2023-11-29 00:55:46,188 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 249 transitions. Word has length 47 [2023-11-29 00:55:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:46,188 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 249 transitions. [2023-11-29 00:55:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 00:55:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 249 transitions. [2023-11-29 00:55:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 00:55:46,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:46,190 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:46,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:55:46,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:55:46,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:46,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:46,391 INFO L85 PathProgramCache]: Analyzing trace with hash 371933676, now seen corresponding path program 1 times [2023-11-29 00:55:46,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:46,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520072940] [2023-11-29 00:55:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:46,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:46,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:46,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314599218] [2023-11-29 00:55:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:46,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:46,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:55:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:46,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 00:55:46,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 00:55:47,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 00:55:48,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520072940] [2023-11-29 00:55:48,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314599218] [2023-11-29 00:55:48,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314599218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:48,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:48,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-29 00:55:48,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346714671] [2023-11-29 00:55:48,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:55:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:55:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:55:48,053 INFO L87 Difference]: Start difference. First operand 173 states and 249 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 00:55:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:59,667 INFO L93 Difference]: Finished difference Result 402 states and 590 transitions. [2023-11-29 00:55:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 00:55:59,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 59 [2023-11-29 00:55:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:59,670 INFO L225 Difference]: With dead ends: 402 [2023-11-29 00:55:59,670 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 00:55:59,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:55:59,673 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 186 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:59,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 399 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 00:55:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 00:55:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 259. [2023-11-29 00:55:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 157 states have (on average 1.197452229299363) internal successors, (188), 165 states have internal predecessors, (188), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (88), 81 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-29 00:55:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 365 transitions. [2023-11-29 00:55:59,783 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 365 transitions. Word has length 59 [2023-11-29 00:55:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:59,784 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 365 transitions. [2023-11-29 00:55:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 00:55:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 365 transitions. [2023-11-29 00:55:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 00:55:59,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:59,785 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:59,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:55:59,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:55:59,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:59,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1835197705, now seen corresponding path program 1 times [2023-11-29 00:55:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:59,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419016106] [2023-11-29 00:55:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:59,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:59,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33996387] [2023-11-29 00:55:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:59,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:59,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:59,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:56:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:00,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:56:00,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 00:56:00,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 00:56:00,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419016106] [2023-11-29 00:56:00,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33996387] [2023-11-29 00:56:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33996387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:00,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 15 [2023-11-29 00:56:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212499086] [2023-11-29 00:56:00,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:56:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:56:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:56:00,271 INFO L87 Difference]: Start difference. First operand 259 states and 365 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-29 00:56:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:00,678 INFO L93 Difference]: Finished difference Result 281 states and 397 transitions. [2023-11-29 00:56:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:56:00,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 69 [2023-11-29 00:56:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:00,681 INFO L225 Difference]: With dead ends: 281 [2023-11-29 00:56:00,681 INFO L226 Difference]: Without dead ends: 279 [2023-11-29 00:56:00,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:56:00,682 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:00,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 190 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:56:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-29 00:56:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 263. [2023-11-29 00:56:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 160 states have (on average 1.19375) internal successors, (191), 168 states have internal predecessors, (191), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (88), 81 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-29 00:56:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2023-11-29 00:56:00,803 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 69 [2023-11-29 00:56:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:00,804 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2023-11-29 00:56:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-29 00:56:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2023-11-29 00:56:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 00:56:00,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:00,805 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:00,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:56:01,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:56:01,006 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:01,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1365578820, now seen corresponding path program 1 times [2023-11-29 00:56:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:01,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603580457] [2023-11-29 00:56:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:01,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:01,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177485192] [2023-11-29 00:56:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:01,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:01,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:56:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:01,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:56:01,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 00:56:01,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:56:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:01,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603580457] [2023-11-29 00:56:01,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:01,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177485192] [2023-11-29 00:56:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177485192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:56:01,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:56:01,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:56:01,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711465542] [2023-11-29 00:56:01,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:56:01,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:56:01,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:56:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:56:01,118 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 00:56:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:01,298 INFO L93 Difference]: Finished difference Result 463 states and 657 transitions. [2023-11-29 00:56:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:56:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 72 [2023-11-29 00:56:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:01,300 INFO L225 Difference]: With dead ends: 463 [2023-11-29 00:56:01,300 INFO L226 Difference]: Without dead ends: 288 [2023-11-29 00:56:01,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:56:01,301 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:01,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:56:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-29 00:56:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 279. [2023-11-29 00:56:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 176 states have (on average 1.1931818181818181) internal successors, (210), 177 states have internal predecessors, (210), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-29 00:56:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 387 transitions. [2023-11-29 00:56:01,406 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 387 transitions. Word has length 72 [2023-11-29 00:56:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:01,406 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 387 transitions. [2023-11-29 00:56:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 00:56:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 387 transitions. [2023-11-29 00:56:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 00:56:01,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:01,407 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:01,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:56:01,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:56:01,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:01,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1987179952, now seen corresponding path program 2 times [2023-11-29 00:56:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:01,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837166032] [2023-11-29 00:56:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:01,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:01,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:01,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148420906] [2023-11-29 00:56:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:56:01,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:01,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:01,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:56:01,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:56:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:01,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:56:01,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 00:56:01,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-29 00:56:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837166032] [2023-11-29 00:56:01,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148420906] [2023-11-29 00:56:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148420906] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:01,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:56:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2023-11-29 00:56:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099151335] [2023-11-29 00:56:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:56:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:56:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:56:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:56:01,895 INFO L87 Difference]: Start difference. First operand 279 states and 387 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 00:56:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:02,100 INFO L93 Difference]: Finished difference Result 319 states and 445 transitions. [2023-11-29 00:56:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:56:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 72 [2023-11-29 00:56:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:02,103 INFO L225 Difference]: With dead ends: 319 [2023-11-29 00:56:02,103 INFO L226 Difference]: Without dead ends: 317 [2023-11-29 00:56:02,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:56:02,104 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:02,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:56:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-29 00:56:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 311. [2023-11-29 00:56:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 190 states have (on average 1.2) internal successors, (228), 191 states have internal predecessors, (228), 105 states have call successors, (105), 15 states have call predecessors, (105), 15 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-29 00:56:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 437 transitions. [2023-11-29 00:56:02,272 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 437 transitions. Word has length 72 [2023-11-29 00:56:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:02,272 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 437 transitions. [2023-11-29 00:56:02,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 00:56:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 437 transitions. [2023-11-29 00:56:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 00:56:02,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:02,274 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:02,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:56:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:56:02,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:02,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1054791738, now seen corresponding path program 3 times [2023-11-29 00:56:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456671341] [2023-11-29 00:56:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:02,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057226537] [2023-11-29 00:56:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:56:02,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:02,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:02,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:02,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:56:02,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:56:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:02,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 00:56:02,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 00:56:03,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 00:56:04,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:04,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456671341] [2023-11-29 00:56:04,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:04,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057226537] [2023-11-29 00:56:04,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057226537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:04,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:04,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2023-11-29 00:56:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045945350] [2023-11-29 00:56:04,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:04,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:56:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:56:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:56:04,372 INFO L87 Difference]: Start difference. First operand 311 states and 437 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 00:56:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:12,980 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2023-11-29 00:56:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:56:12,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 72 [2023-11-29 00:56:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:12,984 INFO L225 Difference]: With dead ends: 418 [2023-11-29 00:56:12,984 INFO L226 Difference]: Without dead ends: 416 [2023-11-29 00:56:12,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=625, Invalid=2455, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:56:12,987 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:12,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 531 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 00:56:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-29 00:56:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 355. [2023-11-29 00:56:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 222 states have (on average 1.1846846846846846) internal successors, (263), 223 states have internal predecessors, (263), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-29 00:56:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2023-11-29 00:56:13,192 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 72 [2023-11-29 00:56:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:13,192 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2023-11-29 00:56:13,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 00:56:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2023-11-29 00:56:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 00:56:13,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:13,194 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:13,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:56:13,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:56:13,394 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:13,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash 807741843, now seen corresponding path program 1 times [2023-11-29 00:56:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:13,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435063532] [2023-11-29 00:56:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:13,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:13,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087452642] [2023-11-29 00:56:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:13,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:13,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:13,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:56:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:13,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 00:56:13,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-29 00:56:14,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-29 00:56:22,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:22,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435063532] [2023-11-29 00:56:22,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:22,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087452642] [2023-11-29 00:56:22,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087452642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:22,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:22,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-11-29 00:56:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127391214] [2023-11-29 00:56:22,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:56:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:56:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:56:22,435 INFO L87 Difference]: Start difference. First operand 355 states and 488 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-29 00:56:47,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:56:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:50,002 INFO L93 Difference]: Finished difference Result 538 states and 761 transitions. [2023-11-29 00:56:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 00:56:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 86 [2023-11-29 00:56:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:50,005 INFO L225 Difference]: With dead ends: 538 [2023-11-29 00:56:50,005 INFO L226 Difference]: Without dead ends: 534 [2023-11-29 00:56:50,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1290, Invalid=5516, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 00:56:50,008 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 277 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:50,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 896 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-11-29 00:56:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-29 00:56:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 506. [2023-11-29 00:56:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 313 states have (on average 1.207667731629393) internal successors, (378), 314 states have internal predecessors, (378), 169 states have call successors, (169), 23 states have call predecessors, (169), 23 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-29 00:56:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 715 transitions. [2023-11-29 00:56:50,601 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 715 transitions. Word has length 86 [2023-11-29 00:56:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:50,601 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 715 transitions. [2023-11-29 00:56:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-29 00:56:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 715 transitions. [2023-11-29 00:56:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 00:56:50,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:50,603 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:50,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:56:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:56:50,804 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:50,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash -945949089, now seen corresponding path program 1 times [2023-11-29 00:56:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:50,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504118887] [2023-11-29 00:56:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:50,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877538640] [2023-11-29 00:56:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:50,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:50,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:50,813 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:50,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:56:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:50,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:56:50,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-11-29 00:56:51,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 00:56:52,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:52,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504118887] [2023-11-29 00:56:52,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:56:52,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877538640] [2023-11-29 00:56:52,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877538640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:52,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-29 00:56:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524854298] [2023-11-29 00:56:52,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:56:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:56:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:56:52,156 INFO L87 Difference]: Start difference. First operand 506 states and 715 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-29 00:56:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:56,018 INFO L93 Difference]: Finished difference Result 1062 states and 1638 transitions. [2023-11-29 00:56:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:56:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 89 [2023-11-29 00:56:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:56,026 INFO L225 Difference]: With dead ends: 1062 [2023-11-29 00:56:56,026 INFO L226 Difference]: Without dead ends: 1060 [2023-11-29 00:56:56,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=579, Invalid=2073, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:56:56,028 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 139 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:56,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 471 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:56:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-11-29 00:56:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 899. [2023-11-29 00:56:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 485 states have (on average 1.2721649484536082) internal successors, (617), 486 states have internal predecessors, (617), 385 states have call successors, (385), 28 states have call predecessors, (385), 28 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-11-29 00:56:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1386 transitions. [2023-11-29 00:56:57,106 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1386 transitions. Word has length 89 [2023-11-29 00:56:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:57,106 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1386 transitions. [2023-11-29 00:56:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-29 00:56:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1386 transitions. [2023-11-29 00:56:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 00:56:57,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:57,108 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:57,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:56:57,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:56:57,308 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 263580550, now seen corresponding path program 4 times [2023-11-29 00:56:57,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:57,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096112866] [2023-11-29 00:56:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:57,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:56:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086814400] [2023-11-29 00:56:57,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:56:57,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:57,320 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:57,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:56:57,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:56:57,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:57,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:56:57,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-29 00:57:00,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-29 00:57:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096112866] [2023-11-29 00:57:01,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:57:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086814400] [2023-11-29 00:57:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086814400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:01,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:57:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 25 [2023-11-29 00:57:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722309125] [2023-11-29 00:57:01,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:57:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:57:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:57:01,486 INFO L87 Difference]: Start difference. First operand 899 states and 1386 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-29 00:57:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:57:33,048 INFO L93 Difference]: Finished difference Result 991 states and 1520 transitions. [2023-11-29 00:57:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:57:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 92 [2023-11-29 00:57:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:57:33,055 INFO L225 Difference]: With dead ends: 991 [2023-11-29 00:57:33,055 INFO L226 Difference]: Without dead ends: 989 [2023-11-29 00:57:33,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:57:33,057 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:57:33,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 645 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2023-11-29 00:57:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2023-11-29 00:57:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 919. [2023-11-29 00:57:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 500 states have (on average 1.264) internal successors, (632), 501 states have internal predecessors, (632), 385 states have call successors, (385), 33 states have call predecessors, (385), 33 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-11-29 00:57:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1401 transitions. [2023-11-29 00:57:34,141 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1401 transitions. Word has length 92 [2023-11-29 00:57:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:57:34,141 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1401 transitions. [2023-11-29 00:57:34,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-29 00:57:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1401 transitions. [2023-11-29 00:57:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 00:57:34,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:57:34,143 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:57:34,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:57:34,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:34,344 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:57:34,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:57:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -842150628, now seen corresponding path program 2 times [2023-11-29 00:57:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:57:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871531711] [2023-11-29 00:57:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:57:34,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:57:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074147248] [2023-11-29 00:57:34,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:57:34,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:34,354 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:34,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:57:34,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:57:34,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:57:34,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:57:34,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 00:57:34,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 00:57:34,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871531711] [2023-11-29 00:57:34,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:57:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074147248] [2023-11-29 00:57:34,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074147248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:34,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:57:34,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-11-29 00:57:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415646844] [2023-11-29 00:57:34,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:57:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:57:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:57:34,610 INFO L87 Difference]: Start difference. First operand 919 states and 1401 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-29 00:57:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:57:36,322 INFO L93 Difference]: Finished difference Result 1110 states and 1703 transitions. [2023-11-29 00:57:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:57:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 94 [2023-11-29 00:57:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:57:36,328 INFO L225 Difference]: With dead ends: 1110 [2023-11-29 00:57:36,329 INFO L226 Difference]: Without dead ends: 1103 [2023-11-29 00:57:36,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:57:36,330 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:57:36,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 380 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:57:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-11-29 00:57:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 882. [2023-11-29 00:57:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 471 states have (on average 1.2696390658174097) internal successors, (598), 472 states have internal predecessors, (598), 377 states have call successors, (377), 33 states have call predecessors, (377), 33 states have return successors, (376), 376 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 00:57:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1351 transitions. [2023-11-29 00:57:37,605 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1351 transitions. Word has length 94 [2023-11-29 00:57:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:57:37,605 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1351 transitions. [2023-11-29 00:57:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-29 00:57:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1351 transitions. [2023-11-29 00:57:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-29 00:57:37,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:57:37,607 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:57:37,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:57:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:37,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:57:37,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:57:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1341117113, now seen corresponding path program 2 times [2023-11-29 00:57:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:57:37,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895765944] [2023-11-29 00:57:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:57:37,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:57:37,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786157245] [2023-11-29 00:57:37,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:57:37,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:37,818 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:57:37,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:57:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:57:37,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 00:57:37,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-29 00:57:39,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-11-29 00:57:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895765944] [2023-11-29 00:57:49,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:57:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786157245] [2023-11-29 00:57:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786157245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:49,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:57:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-11-29 00:57:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520390432] [2023-11-29 00:57:49,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:57:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:57:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:57:49,591 INFO L87 Difference]: Start difference. First operand 882 states and 1351 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-11-29 00:58:14,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:58:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:58:50,899 INFO L93 Difference]: Finished difference Result 1435 states and 2189 transitions. [2023-11-29 00:58:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 00:58:50,900 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 106 [2023-11-29 00:58:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:58:50,906 INFO L225 Difference]: With dead ends: 1435 [2023-11-29 00:58:50,906 INFO L226 Difference]: Without dead ends: 1159 [2023-11-29 00:58:50,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=1503, Invalid=6686, Unknown=1, NotChecked=0, Total=8190 [2023-11-29 00:58:50,912 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:58:50,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 563 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2023-11-29 00:58:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2023-11-29 00:58:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1059. [2023-11-29 00:58:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 570 states have (on average 1.2614035087719297) internal successors, (719), 571 states have internal predecessors, (719), 449 states have call successors, (449), 39 states have call predecessors, (449), 39 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-29 00:58:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1616 transitions. [2023-11-29 00:58:52,433 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1616 transitions. Word has length 106 [2023-11-29 00:58:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:58:52,434 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1616 transitions. [2023-11-29 00:58:52,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-11-29 00:58:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1616 transitions. [2023-11-29 00:58:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 00:58:52,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:58:52,436 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:52,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:58:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:52,637 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:58:52,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1510458229, now seen corresponding path program 1 times [2023-11-29 00:58:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:52,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751925713] [2023-11-29 00:58:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:52,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:58:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944675612] [2023-11-29 00:58:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:52,648 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:52,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:58:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:52,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 00:58:52,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:58:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 67 proven. 59 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-11-29 00:58:54,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 62 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-29 00:59:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751925713] [2023-11-29 00:59:04,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:59:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944675612] [2023-11-29 00:59:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944675612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:04,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:59:04,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2023-11-29 00:59:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568651362] [2023-11-29 00:59:04,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:59:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:59:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1097, Unknown=1, NotChecked=0, Total=1332 [2023-11-29 00:59:04,652 INFO L87 Difference]: Start difference. First operand 1059 states and 1616 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 33 states have internal predecessors, (77), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-11-29 00:59:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:25,970 INFO L93 Difference]: Finished difference Result 1266 states and 1897 transitions. [2023-11-29 00:59:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:59:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 33 states have internal predecessors, (77), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 119 [2023-11-29 00:59:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:25,977 INFO L225 Difference]: With dead ends: 1266 [2023-11-29 00:59:25,978 INFO L226 Difference]: Without dead ends: 1264 [2023-11-29 00:59:25,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1204, Invalid=4801, Unknown=1, NotChecked=0, Total=6006 [2023-11-29 00:59:25,980 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 327 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:25,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 783 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 00:59:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-11-29 00:59:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1212. [2023-11-29 00:59:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 663 states have (on average 1.2473604826546003) internal successors, (827), 668 states have internal predecessors, (827), 501 states have call successors, (501), 47 states have call predecessors, (501), 47 states have return successors, (500), 496 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-29 00:59:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1828 transitions. [2023-11-29 00:59:28,013 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1828 transitions. Word has length 119 [2023-11-29 00:59:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:28,014 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1828 transitions. [2023-11-29 00:59:28,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 33 states have internal predecessors, (77), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-11-29 00:59:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1828 transitions. [2023-11-29 00:59:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 00:59:28,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:28,017 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:28,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:59:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:28,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:59:28,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1949761216, now seen corresponding path program 3 times [2023-11-29 00:59:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323092870] [2023-11-29 00:59:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:28,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:59:28,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699969017] [2023-11-29 00:59:28,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:59:28,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:28,227 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:28,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:59:28,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 00:59:28,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:59:28,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 00:59:28,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 85 proven. 54 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2023-11-29 00:59:30,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323092870] [2023-11-29 00:59:32,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:59:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699969017] [2023-11-29 00:59:32,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699969017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:32,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:59:32,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 00:59:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149451743] [2023-11-29 00:59:32,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:32,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:59:32,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:59:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:59:32,856 INFO L87 Difference]: Start difference. First operand 1212 states and 1828 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-29 00:59:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:37,450 INFO L93 Difference]: Finished difference Result 1373 states and 2069 transitions. [2023-11-29 00:59:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:59:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 133 [2023-11-29 00:59:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:37,459 INFO L225 Difference]: With dead ends: 1373 [2023-11-29 00:59:37,460 INFO L226 Difference]: Without dead ends: 1366 [2023-11-29 00:59:37,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:59:37,461 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:37,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 499 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:59:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-29 00:59:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1309. [2023-11-29 00:59:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 710 states have (on average 1.2549295774647888) internal successors, (891), 714 states have internal predecessors, (891), 547 states have call successors, (547), 51 states have call predecessors, (547), 51 states have return successors, (546), 543 states have call predecessors, (546), 546 states have call successors, (546) [2023-11-29 00:59:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 1984 transitions. [2023-11-29 00:59:39,610 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 1984 transitions. Word has length 133 [2023-11-29 00:59:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:39,610 INFO L495 AbstractCegarLoop]: Abstraction has 1309 states and 1984 transitions. [2023-11-29 00:59:39,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-29 00:59:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 1984 transitions. [2023-11-29 00:59:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 00:59:39,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:39,614 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:39,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:59:39,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:39,814 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:59:39,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1696464488, now seen corresponding path program 4 times [2023-11-29 00:59:39,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:39,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428049359] [2023-11-29 00:59:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:39,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:39,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:59:39,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053914447] [2023-11-29 00:59:39,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:59:39,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:39,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:39,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:39,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:59:39,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:59:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:59:39,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 00:59:39,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-29 00:59:41,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:44,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428049359] [2023-11-29 00:59:44,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:59:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053914447] [2023-11-29 00:59:44,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053914447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:44,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:59:44,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 00:59:44,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263577322] [2023-11-29 00:59:44,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:44,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:59:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:59:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:59:44,267 INFO L87 Difference]: Start difference. First operand 1309 states and 1984 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 00:59:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:49,057 INFO L93 Difference]: Finished difference Result 1474 states and 2215 transitions. [2023-11-29 00:59:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:59:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 133 [2023-11-29 00:59:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:49,065 INFO L225 Difference]: With dead ends: 1474 [2023-11-29 00:59:49,065 INFO L226 Difference]: Without dead ends: 1467 [2023-11-29 00:59:49,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:59:49,066 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:49,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 704 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:59:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2023-11-29 00:59:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1442. [2023-11-29 00:59:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 779 states have (on average 1.2554557124518613) internal successors, (978), 783 states have internal predecessors, (978), 603 states have call successors, (603), 59 states have call predecessors, (603), 59 states have return successors, (602), 599 states have call predecessors, (602), 602 states have call successors, (602) [2023-11-29 00:59:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2183 transitions. [2023-11-29 00:59:51,597 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2183 transitions. Word has length 133 [2023-11-29 00:59:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:51,598 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 2183 transitions. [2023-11-29 00:59:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 00:59:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2183 transitions. [2023-11-29 00:59:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:59:51,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:51,602 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:51,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:59:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:51,802 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:59:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1628825447, now seen corresponding path program 2 times [2023-11-29 00:59:51,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:51,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094198861] [2023-11-29 00:59:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:51,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:59:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538780904] [2023-11-29 00:59:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:59:51,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:51,813 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:51,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:59:51,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:59:51,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:59:51,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 00:59:51,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 45 proven. 63 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2023-11-29 00:59:52,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 40 proven. 54 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2023-11-29 00:59:54,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:54,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094198861] [2023-11-29 00:59:54,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:59:54,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538780904] [2023-11-29 00:59:54,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538780904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:54,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:59:54,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2023-11-29 00:59:54,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467517300] [2023-11-29 00:59:54,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:54,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:59:54,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:54,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:59:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:59:54,284 INFO L87 Difference]: Start difference. First operand 1442 states and 2183 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 12 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 12 states have call successors, (43) [2023-11-29 01:00:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:00:09,396 INFO L93 Difference]: Finished difference Result 2661 states and 4223 transitions. [2023-11-29 01:00:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 01:00:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 12 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 12 states have call successors, (43) Word has length 138 [2023-11-29 01:00:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:00:09,410 INFO L225 Difference]: With dead ends: 2661 [2023-11-29 01:00:09,410 INFO L226 Difference]: Without dead ends: 2659 [2023-11-29 01:00:09,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1286, Invalid=4566, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 01:00:09,413 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 411 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:00:09,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1001 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 01:00:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2023-11-29 01:00:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2436. [2023-11-29 01:00:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 1174 states have (on average 1.317717206132879) internal successors, (1547), 1178 states have internal predecessors, (1547), 1195 states have call successors, (1195), 66 states have call predecessors, (1195), 66 states have return successors, (1194), 1191 states have call predecessors, (1194), 1194 states have call successors, (1194) [2023-11-29 01:00:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3936 transitions. [2023-11-29 01:00:14,160 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3936 transitions. Word has length 138 [2023-11-29 01:00:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:00:14,160 INFO L495 AbstractCegarLoop]: Abstraction has 2436 states and 3936 transitions. [2023-11-29 01:00:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 12 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 12 states have call successors, (43) [2023-11-29 01:00:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3936 transitions. [2023-11-29 01:00:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 01:00:14,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:00:14,165 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:14,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:00:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:00:14,366 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:00:14,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash 649151390, now seen corresponding path program 5 times [2023-11-29 01:00:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:00:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597436479] [2023-11-29 01:00:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:14,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:00:14,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:00:14,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428326197] [2023-11-29 01:00:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:00:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:00:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:00:14,378 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:00:14,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:00:14,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:00:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:00:14,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 01:00:14,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 42 proven. 146 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 01:00:18,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:00:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:00:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597436479] [2023-11-29 01:00:36,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:00:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428326197] [2023-11-29 01:00:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428326197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:00:36,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:00:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 01:00:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102703062] [2023-11-29 01:00:36,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:00:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:00:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:00:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:00:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:00:36,311 INFO L87 Difference]: Start difference. First operand 2436 states and 3936 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 01:00:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:00:47,485 INFO L93 Difference]: Finished difference Result 2824 states and 4569 transitions. [2023-11-29 01:00:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:00:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 138 [2023-11-29 01:00:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:00:47,500 INFO L225 Difference]: With dead ends: 2824 [2023-11-29 01:00:47,500 INFO L226 Difference]: Without dead ends: 2817 [2023-11-29 01:00:47,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=316, Invalid=2336, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 01:00:47,502 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 85 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:00:47,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1041 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:00:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2023-11-29 01:00:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2683. [2023-11-29 01:00:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 1287 states have (on average 1.3193473193473193) internal successors, (1698), 1291 states have internal predecessors, (1698), 1323 states have call successors, (1323), 72 states have call predecessors, (1323), 72 states have return successors, (1322), 1319 states have call predecessors, (1322), 1322 states have call successors, (1322) [2023-11-29 01:00:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4343 transitions. [2023-11-29 01:00:52,893 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4343 transitions. Word has length 138 [2023-11-29 01:00:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:00:52,893 INFO L495 AbstractCegarLoop]: Abstraction has 2683 states and 4343 transitions. [2023-11-29 01:00:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 01:00:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4343 transitions. [2023-11-29 01:00:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 01:00:52,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:00:52,898 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:00:52,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:00:53,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:00:53,098 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:00:53,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:00:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1678810135, now seen corresponding path program 6 times [2023-11-29 01:00:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:00:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890019340] [2023-11-29 01:00:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:00:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:00:53,107 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:00:53,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882832230] [2023-11-29 01:00:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:00:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:00:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:00:53,109 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:00:53,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:00:53,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 01:00:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:00:53,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-29 01:00:53,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 55 proven. 115 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-29 01:00:55,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:13,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:13,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890019340] [2023-11-29 01:01:13,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:01:13,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882832230] [2023-11-29 01:01:13,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882832230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:01:13,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:01:13,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-11-29 01:01:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975129793] [2023-11-29 01:01:13,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:13,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:01:13,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:01:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1579, Unknown=1, NotChecked=0, Total=1806 [2023-11-29 01:01:13,216 INFO L87 Difference]: Start difference. First operand 2683 states and 4343 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:01:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:01:21,576 INFO L93 Difference]: Finished difference Result 3312 states and 5340 transitions. [2023-11-29 01:01:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:01:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 141 [2023-11-29 01:01:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:01:21,598 INFO L225 Difference]: With dead ends: 3312 [2023-11-29 01:01:21,599 INFO L226 Difference]: Without dead ends: 3000 [2023-11-29 01:01:21,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=443, Invalid=2978, Unknown=1, NotChecked=0, Total=3422 [2023-11-29 01:01:21,602 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:01:21,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 891 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:01:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2023-11-29 01:01:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2823. [2023-11-29 01:01:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 1354 states have (on average 1.3190546528803544) internal successors, (1786), 1358 states have internal predecessors, (1786), 1391 states have call successors, (1391), 77 states have call predecessors, (1391), 77 states have return successors, (1390), 1387 states have call predecessors, (1390), 1390 states have call successors, (1390) [2023-11-29 01:01:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 4567 transitions. [2023-11-29 01:01:27,191 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 4567 transitions. Word has length 141 [2023-11-29 01:01:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:01:27,191 INFO L495 AbstractCegarLoop]: Abstraction has 2823 states and 4567 transitions. [2023-11-29 01:01:27,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:01:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 4567 transitions. [2023-11-29 01:01:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 01:01:27,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:01:27,195 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:27,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:01:27,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:01:27,395 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:01:27,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1313831839, now seen corresponding path program 7 times [2023-11-29 01:01:27,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:27,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904435070] [2023-11-29 01:01:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:27,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:27,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:01:27,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197804128] [2023-11-29 01:01:27,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:01:27,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:27,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:27,408 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:01:27,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0349c45-0d73-4ad4-97c2-c929ad71e3ce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:01:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:27,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-29 01:01:27,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 73 proven. 100 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-11-29 01:01:29,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 70 proven. 91 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-11-29 01:01:42,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:42,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904435070] [2023-11-29 01:01:42,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:01:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197804128] [2023-11-29 01:01:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197804128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:42,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:01:42,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 47 [2023-11-29 01:01:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445162048] [2023-11-29 01:01:42,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:42,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 01:01:42,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 01:01:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:01:42,056 INFO L87 Difference]: Start difference. First operand 2823 states and 4567 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2023-11-29 01:02:02,114 WARN L293 SmtUtils]: Spent 15.86s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:02:17,644 WARN L293 SmtUtils]: Spent 11.39s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:02:36,484 WARN L293 SmtUtils]: Spent 13.53s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:02:39,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:02:42,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:02:54,049 WARN L293 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:02:58,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:03:02,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:03:06,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:03:11,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:04:07,140 WARN L293 SmtUtils]: Spent 30.87s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:04:11,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:04:15,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:04:20,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:04:24,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:04:36,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:05:17,584 WARN L293 SmtUtils]: Spent 18.36s on a formula simplification that was a NOOP. DAG size: 162 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:05:23,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:05:29,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:05:34,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:05:38,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:18,592 WARN L293 SmtUtils]: Spent 23.70s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:06:26,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:28,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:32,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:36,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:40,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:44,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:06:59,797 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:04,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:07:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:07:15,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:07:35,609 WARN L293 SmtUtils]: Spent 8.50s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:56,418 WARN L293 SmtUtils]: Spent 17.43s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:07:59,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:10,673 WARN L293 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:08:14,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:18,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:22,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:26,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:30,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:32,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:36,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:50,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:08:53,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:09:08,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:09:15,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:09:28,496 WARN L293 SmtUtils]: Spent 9.96s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:09:51,740 WARN L293 SmtUtils]: Spent 15.97s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:09:58,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:10:02,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:10:06,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:10:13,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:10:18,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []