./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i --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_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/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_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/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_606b8ca6-2990-499a-9a70-6dfb5820fcec/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 f3b875613fa5f97f08f3833527f8e0ee0d41bb6c604e635f1323b904ed09bfde --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:09:59,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:09:59,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:09:59,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:09:59,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:09:59,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:09:59,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:09:59,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:09:59,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:09:59,209 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:09:59,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:09:59,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:09:59,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:09:59,211 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:09:59,212 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:09:59,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:09:59,213 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:09:59,213 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:09:59,214 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:09:59,214 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:09:59,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:09:59,215 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:09:59,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:09:59,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:09:59,217 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:09:59,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:09:59,217 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:09:59,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:09:59,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:09:59,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:09:59,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:09:59,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:09:59,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:09:59,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:09:59,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:09:59,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:09:59,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:09:59,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:09:59,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:09:59,222 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:09:59,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:09:59,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:09:59,222 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_606b8ca6-2990-499a-9a70-6dfb5820fcec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3b875613fa5f97f08f3833527f8e0ee0d41bb6c604e635f1323b904ed09bfde [2023-11-29 06:09:59,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:09:59,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:09:59,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:09:59,453 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:09:59,453 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:09:59,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i [2023-11-29 06:10:02,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:10:02,480 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:10:02,481 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i [2023-11-29 06:10:02,497 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/data/140af862e/8bf9a0a8fa9f40f890161097302ca47a/FLAG7bf56b58b [2023-11-29 06:10:02,511 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/data/140af862e/8bf9a0a8fa9f40f890161097302ca47a [2023-11-29 06:10:02,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:10:02,515 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:10:02,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:10:02,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:10:02,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:10:02,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:10:02" (1/1) ... [2023-11-29 06:10:02,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6510c43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:02, skipping insertion in model container [2023-11-29 06:10:02,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:10:02" (1/1) ... [2023-11-29 06:10:02,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:10:02,727 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_606b8ca6-2990-499a-9a70-6dfb5820fcec/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i[916,929] [2023-11-29 06:10:02,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:10:02,965 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:10:02,977 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_606b8ca6-2990-499a-9a70-6dfb5820fcec/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-85.i[916,929] [2023-11-29 06:10:03,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:10:03,118 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:10:03,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03 WrapperNode [2023-11-29 06:10:03,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:10:03,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:10:03,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:10:03,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:10:03,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,278 INFO L138 Inliner]: procedures = 26, calls = 78, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 676 [2023-11-29 06:10:03,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:10:03,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:10:03,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:10:03,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:10:03,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,306 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,360 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 06:10:03,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:10:03,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:10:03,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:10:03,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:10:03,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (1/1) ... [2023-11-29 06:10:03,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:10:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:03,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:10:03,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:10:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:10:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:10:03,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:10:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:10:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:10:03,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:10:03,606 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:10:03,608 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:10:04,576 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:10:04,613 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:10:04,613 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:10:04,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:10:04 BoogieIcfgContainer [2023-11-29 06:10:04,614 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:10:04,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:10:04,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:10:04,620 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:10:04,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:10:02" (1/3) ... [2023-11-29 06:10:04,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2043b74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:10:04, skipping insertion in model container [2023-11-29 06:10:04,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:10:03" (2/3) ... [2023-11-29 06:10:04,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2043b74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:10:04, skipping insertion in model container [2023-11-29 06:10:04,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:10:04" (3/3) ... [2023-11-29 06:10:04,622 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-85.i [2023-11-29 06:10:04,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:10:04,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:10:04,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:10:04,706 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;@5d8769c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:10:04,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:10:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 188 states have (on average 1.5904255319148937) internal successors, (299), 189 states have internal predecessors, (299), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-29 06:10:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:04,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:04,759 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:04,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:04,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1858856777, now seen corresponding path program 1 times [2023-11-29 06:10:04,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:04,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098102433] [2023-11-29 06:10:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:05,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098102433] [2023-11-29 06:10:05,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:10:05,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752525727] [2023-11-29 06:10:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:05,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:05,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:05,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:10:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:05,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:10:05,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2023-11-29 06:10:05,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752525727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:05,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:10:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24822513] [2023-11-29 06:10:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:10:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:10:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:10:05,712 INFO L87 Difference]: Start difference. First operand has 256 states, 188 states have (on average 1.5904255319148937) internal successors, (299), 189 states have internal predecessors, (299), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 06:10:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:05,785 INFO L93 Difference]: Finished difference Result 509 states and 921 transitions. [2023-11-29 06:10:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:10:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) Word has length 451 [2023-11-29 06:10:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:05,800 INFO L225 Difference]: With dead ends: 509 [2023-11-29 06:10:05,800 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 06:10:05,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 450 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 06:10:05,810 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:05,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 419 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:10:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 06:10:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2023-11-29 06:10:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 187 states have (on average 1.5614973262032086) internal successors, (292), 187 states have internal predecessors, (292), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-29 06:10:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 422 transitions. [2023-11-29 06:10:05,886 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 422 transitions. Word has length 451 [2023-11-29 06:10:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:05,886 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 422 transitions. [2023-11-29 06:10:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 06:10:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 422 transitions. [2023-11-29 06:10:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:05,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:05,901 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:05,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:10:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:10:06,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:06,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash 521055879, now seen corresponding path program 1 times [2023-11-29 06:10:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446940017] [2023-11-29 06:10:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:06,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:06,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291511583] [2023-11-29 06:10:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:06,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:06,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:10:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:06,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:10:06,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:06,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446940017] [2023-11-29 06:10:06,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291511583] [2023-11-29 06:10:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291511583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:06,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:10:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058214629] [2023-11-29 06:10:06,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:10:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:10:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:06,724 INFO L87 Difference]: Start difference. First operand 254 states and 422 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:06,862 INFO L93 Difference]: Finished difference Result 671 states and 1118 transitions. [2023-11-29 06:10:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:10:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 451 [2023-11-29 06:10:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:06,869 INFO L225 Difference]: With dead ends: 671 [2023-11-29 06:10:06,869 INFO L226 Difference]: Without dead ends: 418 [2023-11-29 06:10:06,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:06,872 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 235 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:06,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 853 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:10:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-11-29 06:10:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2023-11-29 06:10:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 329 states have (on average 1.6048632218844985) internal successors, (528), 330 states have internal predecessors, (528), 83 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (83), 82 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-29 06:10:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 694 transitions. [2023-11-29 06:10:06,917 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 694 transitions. Word has length 451 [2023-11-29 06:10:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:06,919 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 694 transitions. [2023-11-29 06:10:06,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 694 transitions. [2023-11-29 06:10:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:06,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:06,924 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:06,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:10:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:07,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1763402047, now seen corresponding path program 1 times [2023-11-29 06:10:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532282861] [2023-11-29 06:10:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:07,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:07,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066676525] [2023-11-29 06:10:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:07,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:07,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:10:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:07,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:10:07,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:09,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:09,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:09,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532282861] [2023-11-29 06:10:09,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:09,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066676525] [2023-11-29 06:10:09,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066676525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:09,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:09,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:10:09,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904516512] [2023-11-29 06:10:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:09,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:10:09,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:09,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:10:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:10:09,013 INFO L87 Difference]: Start difference. First operand 415 states and 694 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:09,727 INFO L93 Difference]: Finished difference Result 1454 states and 2439 transitions. [2023-11-29 06:10:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:10:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 451 [2023-11-29 06:10:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:09,739 INFO L225 Difference]: With dead ends: 1454 [2023-11-29 06:10:09,739 INFO L226 Difference]: Without dead ends: 1040 [2023-11-29 06:10:09,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:10:09,742 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 714 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:09,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1766 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:10:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2023-11-29 06:10:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 781. [2023-11-29 06:10:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 629 states have (on average 1.6104928457869634) internal successors, (1013), 630 states have internal predecessors, (1013), 148 states have call successors, (148), 3 states have call predecessors, (148), 3 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-29 06:10:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1309 transitions. [2023-11-29 06:10:09,838 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1309 transitions. Word has length 451 [2023-11-29 06:10:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:09,839 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1309 transitions. [2023-11-29 06:10:09,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1309 transitions. [2023-11-29 06:10:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:09,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:09,845 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:09,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:10:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:10,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:10,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash 547248321, now seen corresponding path program 1 times [2023-11-29 06:10:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:10,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646854290] [2023-11-29 06:10:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:10,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:10,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:10,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103577636] [2023-11-29 06:10:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:10,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:10:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:10,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:10:10,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:10,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646854290] [2023-11-29 06:10:10,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:10,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103577636] [2023-11-29 06:10:10,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103577636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:10,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:10,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:10:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352374939] [2023-11-29 06:10:10,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:10,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:10:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:10:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:10,562 INFO L87 Difference]: Start difference. First operand 781 states and 1309 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:10,713 INFO L93 Difference]: Finished difference Result 1953 states and 3293 transitions. [2023-11-29 06:10:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:10:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 451 [2023-11-29 06:10:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:10,723 INFO L225 Difference]: With dead ends: 1953 [2023-11-29 06:10:10,723 INFO L226 Difference]: Without dead ends: 1360 [2023-11-29 06:10:10,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:10,726 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 398 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:10,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1043 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:10:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2023-11-29 06:10:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 849. [2023-11-29 06:10:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 697 states have (on average 1.6169296987087518) internal successors, (1127), 698 states have internal predecessors, (1127), 148 states have call successors, (148), 3 states have call predecessors, (148), 3 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-29 06:10:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1423 transitions. [2023-11-29 06:10:10,799 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1423 transitions. Word has length 451 [2023-11-29 06:10:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:10,800 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1423 transitions. [2023-11-29 06:10:10,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1423 transitions. [2023-11-29 06:10:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:10,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:10,805 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:10,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:10:11,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:11,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:11,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1849231679, now seen corresponding path program 1 times [2023-11-29 06:10:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792421331] [2023-11-29 06:10:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:11,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:11,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109579080] [2023-11-29 06:10:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:11,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:11,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:11,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:10:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:11,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:10:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:11,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792421331] [2023-11-29 06:10:11,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:11,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109579080] [2023-11-29 06:10:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109579080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:11,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:10:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882198205] [2023-11-29 06:10:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:11,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:10:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:11,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:10:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:11,538 INFO L87 Difference]: Start difference. First operand 849 states and 1423 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:11,773 INFO L93 Difference]: Finished difference Result 2119 states and 3555 transitions. [2023-11-29 06:10:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:10:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 451 [2023-11-29 06:10:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:11,785 INFO L225 Difference]: With dead ends: 2119 [2023-11-29 06:10:11,786 INFO L226 Difference]: Without dead ends: 1472 [2023-11-29 06:10:11,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:11,789 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 402 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:11,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 806 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:10:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-11-29 06:10:11,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1470. [2023-11-29 06:10:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1233 states have (on average 1.59448499594485) internal successors, (1966), 1235 states have internal predecessors, (1966), 231 states have call successors, (231), 5 states have call predecessors, (231), 5 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2428 transitions. [2023-11-29 06:10:11,914 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2428 transitions. Word has length 451 [2023-11-29 06:10:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:11,915 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 2428 transitions. [2023-11-29 06:10:11,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2428 transitions. [2023-11-29 06:10:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 06:10:11,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:11,921 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:10:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:12,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:12,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -973212673, now seen corresponding path program 1 times [2023-11-29 06:10:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786986033] [2023-11-29 06:10:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:12,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:12,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477512995] [2023-11-29 06:10:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:12,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:12,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:12,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:10:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:12,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:10:12,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:12,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:12,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:12,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786986033] [2023-11-29 06:10:12,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:12,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477512995] [2023-11-29 06:10:12,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477512995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:12,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:12,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:10:12,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493466210] [2023-11-29 06:10:12,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:12,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:10:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:10:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:12,605 INFO L87 Difference]: Start difference. First operand 1470 states and 2428 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:12,838 INFO L93 Difference]: Finished difference Result 2529 states and 4172 transitions. [2023-11-29 06:10:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:10:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 451 [2023-11-29 06:10:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:12,850 INFO L225 Difference]: With dead ends: 2529 [2023-11-29 06:10:12,850 INFO L226 Difference]: Without dead ends: 1476 [2023-11-29 06:10:12,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:12,854 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 401 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:12,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1108 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:10:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2023-11-29 06:10:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1474. [2023-11-29 06:10:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1237 states have (on average 1.5683104284559417) internal successors, (1940), 1239 states have internal predecessors, (1940), 231 states have call successors, (231), 5 states have call predecessors, (231), 5 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2402 transitions. [2023-11-29 06:10:12,996 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2402 transitions. Word has length 451 [2023-11-29 06:10:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:12,997 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 2402 transitions. [2023-11-29 06:10:12,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2402 transitions. [2023-11-29 06:10:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 06:10:13,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:13,003 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:13,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:10:13,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:13,204 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash -354320559, now seen corresponding path program 1 times [2023-11-29 06:10:13,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:13,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727519618] [2023-11-29 06:10:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:13,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:13,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293390187] [2023-11-29 06:10:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:13,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:13,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:13,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:10:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:13,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:10:13,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:13,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:13,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727519618] [2023-11-29 06:10:13,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293390187] [2023-11-29 06:10:13,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293390187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:13,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:13,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:10:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517796170] [2023-11-29 06:10:13,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:10:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:10:13,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:13,731 INFO L87 Difference]: Start difference. First operand 1474 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:13,847 INFO L93 Difference]: Finished difference Result 3754 states and 6136 transitions. [2023-11-29 06:10:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:10:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 452 [2023-11-29 06:10:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:13,862 INFO L225 Difference]: With dead ends: 3754 [2023-11-29 06:10:13,862 INFO L226 Difference]: Without dead ends: 2596 [2023-11-29 06:10:13,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:10:13,866 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 398 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:13,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1202 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:10:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2023-11-29 06:10:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1578. [2023-11-29 06:10:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1341 states have (on average 1.5659955257270695) internal successors, (2100), 1343 states have internal predecessors, (2100), 231 states have call successors, (231), 5 states have call predecessors, (231), 5 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2562 transitions. [2023-11-29 06:10:13,997 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2562 transitions. Word has length 452 [2023-11-29 06:10:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:13,998 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2562 transitions. [2023-11-29 06:10:13,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2562 transitions. [2023-11-29 06:10:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 06:10:14,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:14,002 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:14,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:10:14,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:14,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:14,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 69326163, now seen corresponding path program 1 times [2023-11-29 06:10:14,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:14,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487737708] [2023-11-29 06:10:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:14,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:14,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119518967] [2023-11-29 06:10:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:14,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:10:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:14,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:10:14,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:15,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487737708] [2023-11-29 06:10:15,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119518967] [2023-11-29 06:10:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119518967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:15,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:15,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:10:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890576585] [2023-11-29 06:10:15,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:15,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:10:15,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:15,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:10:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:10:15,162 INFO L87 Difference]: Start difference. First operand 1578 states and 2562 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:16,004 INFO L93 Difference]: Finished difference Result 5440 states and 8885 transitions. [2023-11-29 06:10:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:10:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 452 [2023-11-29 06:10:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:16,030 INFO L225 Difference]: With dead ends: 5440 [2023-11-29 06:10:16,030 INFO L226 Difference]: Without dead ends: 3973 [2023-11-29 06:10:16,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:10:16,036 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1435 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:16,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 2300 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:10:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2023-11-29 06:10:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 1584. [2023-11-29 06:10:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1347 states have (on average 1.562731997030438) internal successors, (2105), 1349 states have internal predecessors, (2105), 231 states have call successors, (231), 5 states have call predecessors, (231), 5 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2567 transitions. [2023-11-29 06:10:16,291 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2567 transitions. Word has length 452 [2023-11-29 06:10:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:16,292 INFO L495 AbstractCegarLoop]: Abstraction has 1584 states and 2567 transitions. [2023-11-29 06:10:16,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2567 transitions. [2023-11-29 06:10:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 06:10:16,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:16,298 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:16,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:10:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:16,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 962812501, now seen corresponding path program 1 times [2023-11-29 06:10:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957582339] [2023-11-29 06:10:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:16,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:16,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305261069] [2023-11-29 06:10:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:16,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:16,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:16,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:16,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:10:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:16,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:10:16,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3574 proven. 57 refuted. 0 times theorem prover too weak. 4689 trivial. 0 not checked. [2023-11-29 06:10:17,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 135 proven. 57 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:10:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957582339] [2023-11-29 06:10:18,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305261069] [2023-11-29 06:10:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305261069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:18,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 06:10:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237321503] [2023-11-29 06:10:18,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:10:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:10:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:10:18,075 INFO L87 Difference]: Start difference. First operand 1584 states and 2567 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:10:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:19,655 INFO L93 Difference]: Finished difference Result 4651 states and 7535 transitions. [2023-11-29 06:10:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:10:19,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 452 [2023-11-29 06:10:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:19,671 INFO L225 Difference]: With dead ends: 4651 [2023-11-29 06:10:19,671 INFO L226 Difference]: Without dead ends: 3201 [2023-11-29 06:10:19,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:10:19,674 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 2843 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2907 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:19,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2907 Valid, 2543 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 06:10:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2023-11-29 06:10:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2923. [2023-11-29 06:10:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2513 states have (on average 1.5662554715479506) internal successors, (3936), 2517 states have internal predecessors, (3936), 397 states have call successors, (397), 12 states have call predecessors, (397), 12 states have return successors, (397), 393 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 06:10:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 4730 transitions. [2023-11-29 06:10:19,879 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 4730 transitions. Word has length 452 [2023-11-29 06:10:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:19,880 INFO L495 AbstractCegarLoop]: Abstraction has 2923 states and 4730 transitions. [2023-11-29 06:10:19,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:10:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 4730 transitions. [2023-11-29 06:10:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 06:10:19,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:19,902 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:19,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:10:20,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:20,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:20,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1304827230, now seen corresponding path program 1 times [2023-11-29 06:10:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461623101] [2023-11-29 06:10:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:20,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236353670] [2023-11-29 06:10:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:20,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:20,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:10:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:20,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:10:20,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2584 proven. 156 refuted. 0 times theorem prover too weak. 5580 trivial. 0 not checked. [2023-11-29 06:10:20,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:10:21,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:21,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461623101] [2023-11-29 06:10:21,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:21,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236353670] [2023-11-29 06:10:21,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236353670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:21,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:21,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 06:10:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371759116] [2023-11-29 06:10:21,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:10:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:10:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:10:21,327 INFO L87 Difference]: Start difference. First operand 2923 states and 4730 transitions. Second operand has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-29 06:10:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:21,908 INFO L93 Difference]: Finished difference Result 5579 states and 9006 transitions. [2023-11-29 06:10:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:10:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 453 [2023-11-29 06:10:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:21,928 INFO L225 Difference]: With dead ends: 5579 [2023-11-29 06:10:21,928 INFO L226 Difference]: Without dead ends: 2977 [2023-11-29 06:10:21,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:10:21,934 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 529 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:21,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1350 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:10:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2023-11-29 06:10:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2959. [2023-11-29 06:10:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2540 states have (on average 1.5555118110236221) internal successors, (3951), 2544 states have internal predecessors, (3951), 397 states have call successors, (397), 21 states have call predecessors, (397), 21 states have return successors, (397), 393 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 06:10:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4745 transitions. [2023-11-29 06:10:22,192 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4745 transitions. Word has length 453 [2023-11-29 06:10:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:22,193 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4745 transitions. [2023-11-29 06:10:22,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-29 06:10:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4745 transitions. [2023-11-29 06:10:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 06:10:22,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:22,200 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:22,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:10:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:10:22,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:22,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 581983287, now seen corresponding path program 1 times [2023-11-29 06:10:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774776949] [2023-11-29 06:10:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:22,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964473085] [2023-11-29 06:10:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:22,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:22,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:22,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:22,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:10:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:22,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:10:22,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4092 proven. 78 refuted. 0 times theorem prover too weak. 4150 trivial. 0 not checked. [2023-11-29 06:10:23,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 114 proven. 78 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:10:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774776949] [2023-11-29 06:10:23,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964473085] [2023-11-29 06:10:23,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964473085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:23,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:23,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:10:23,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543866946] [2023-11-29 06:10:23,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:23,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:10:23,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:10:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:10:23,272 INFO L87 Difference]: Start difference. First operand 2959 states and 4745 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 06:10:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:24,062 INFO L93 Difference]: Finished difference Result 5824 states and 9311 transitions. [2023-11-29 06:10:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:10:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 454 [2023-11-29 06:10:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:24,079 INFO L225 Difference]: With dead ends: 5824 [2023-11-29 06:10:24,079 INFO L226 Difference]: Without dead ends: 3007 [2023-11-29 06:10:24,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 900 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:10:24,083 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 559 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:24,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 877 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:10:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2023-11-29 06:10:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2979. [2023-11-29 06:10:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2555 states have (on average 1.540508806262231) internal successors, (3936), 2559 states have internal predecessors, (3936), 397 states have call successors, (397), 26 states have call predecessors, (397), 26 states have return successors, (397), 393 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 06:10:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4730 transitions. [2023-11-29 06:10:24,243 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4730 transitions. Word has length 454 [2023-11-29 06:10:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:24,243 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 4730 transitions. [2023-11-29 06:10:24,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 06:10:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4730 transitions. [2023-11-29 06:10:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 06:10:24,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:24,250 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:24,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:10:24,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:10:24,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:24,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 741317969, now seen corresponding path program 1 times [2023-11-29 06:10:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25565564] [2023-11-29 06:10:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:24,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:24,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013035443] [2023-11-29 06:10:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:24,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:24,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:24,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:24,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:10:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:24,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:10:24,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 918 proven. 9 refuted. 0 times theorem prover too weak. 7393 trivial. 0 not checked. [2023-11-29 06:10:25,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 183 proven. 9 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:10:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25565564] [2023-11-29 06:10:25,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013035443] [2023-11-29 06:10:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013035443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:25,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 06:10:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915183619] [2023-11-29 06:10:25,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:25,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:10:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:10:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:10:25,245 INFO L87 Difference]: Start difference. First operand 2979 states and 4730 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 06:10:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:26,200 INFO L93 Difference]: Finished difference Result 4449 states and 7044 transitions. [2023-11-29 06:10:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:10:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 455 [2023-11-29 06:10:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:26,209 INFO L225 Difference]: With dead ends: 4449 [2023-11-29 06:10:26,209 INFO L226 Difference]: Without dead ends: 1660 [2023-11-29 06:10:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 901 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:10:26,214 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 583 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:26,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1358 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:10:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2023-11-29 06:10:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1604. [2023-11-29 06:10:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1354 states have (on average 1.5073855243722305) internal successors, (2041), 1356 states have internal predecessors, (2041), 231 states have call successors, (231), 18 states have call predecessors, (231), 18 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2503 transitions. [2023-11-29 06:10:26,401 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2503 transitions. Word has length 455 [2023-11-29 06:10:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:26,401 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2503 transitions. [2023-11-29 06:10:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 06:10:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2503 transitions. [2023-11-29 06:10:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 06:10:26,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:26,407 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:26,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:10:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:10:26,608 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:26,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1854319309, now seen corresponding path program 1 times [2023-11-29 06:10:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957852557] [2023-11-29 06:10:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:26,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:26,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457121508] [2023-11-29 06:10:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:26,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:26,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:26,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:10:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:27,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:10:27,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:27,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957852557] [2023-11-29 06:10:27,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457121508] [2023-11-29 06:10:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457121508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:27,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:10:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469947697] [2023-11-29 06:10:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:27,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:10:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:10:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:10:27,547 INFO L87 Difference]: Start difference. First operand 1604 states and 2503 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:29,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:10:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:29,405 INFO L93 Difference]: Finished difference Result 5130 states and 8063 transitions. [2023-11-29 06:10:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:10:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 455 [2023-11-29 06:10:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:29,415 INFO L225 Difference]: With dead ends: 5130 [2023-11-29 06:10:29,415 INFO L226 Difference]: Without dead ends: 3759 [2023-11-29 06:10:29,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:10:29,419 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 829 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:29,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 2085 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 06:10:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2023-11-29 06:10:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 2443. [2023-11-29 06:10:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2014 states have (on average 1.4960278053624627) internal successors, (3013), 2018 states have internal predecessors, (3013), 397 states have call successors, (397), 31 states have call predecessors, (397), 31 states have return successors, (397), 393 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 06:10:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3807 transitions. [2023-11-29 06:10:29,667 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3807 transitions. Word has length 455 [2023-11-29 06:10:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:29,667 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 3807 transitions. [2023-11-29 06:10:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3807 transitions. [2023-11-29 06:10:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 06:10:29,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:29,671 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:29,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:10:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:10:29,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:29,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash 915795089, now seen corresponding path program 1 times [2023-11-29 06:10:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911862302] [2023-11-29 06:10:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:29,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:29,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451711221] [2023-11-29 06:10:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:29,938 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:29,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:10:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:30,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:10:30,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4092 proven. 78 refuted. 0 times theorem prover too weak. 4150 trivial. 0 not checked. [2023-11-29 06:10:31,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 114 proven. 78 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:10:31,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:31,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911862302] [2023-11-29 06:10:31,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451711221] [2023-11-29 06:10:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451711221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:31,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:31,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 06:10:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028533589] [2023-11-29 06:10:31,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:10:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:10:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:10:31,705 INFO L87 Difference]: Start difference. First operand 2443 states and 3807 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:10:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:32,543 INFO L93 Difference]: Finished difference Result 4591 states and 7160 transitions. [2023-11-29 06:10:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:10:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 455 [2023-11-29 06:10:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:32,550 INFO L225 Difference]: With dead ends: 4591 [2023-11-29 06:10:32,550 INFO L226 Difference]: Without dead ends: 2407 [2023-11-29 06:10:32,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 897 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:10:32,554 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1096 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:32,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1019 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:10:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2023-11-29 06:10:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1493. [2023-11-29 06:10:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1243 states have (on average 1.4931617055510862) internal successors, (1856), 1245 states have internal predecessors, (1856), 231 states have call successors, (231), 18 states have call predecessors, (231), 18 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2318 transitions. [2023-11-29 06:10:32,695 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2318 transitions. Word has length 455 [2023-11-29 06:10:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:32,695 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2318 transitions. [2023-11-29 06:10:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:10:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2318 transitions. [2023-11-29 06:10:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-29 06:10:32,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:32,699 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:32,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:10:32,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:10:32,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1468201763, now seen corresponding path program 1 times [2023-11-29 06:10:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557157721] [2023-11-29 06:10:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:32,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:32,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234036586] [2023-11-29 06:10:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:32,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:32,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:32,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:32,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:10:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:33,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:10:33,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4304 proven. 159 refuted. 0 times theorem prover too weak. 3857 trivial. 0 not checked. [2023-11-29 06:10:34,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 219 proven. 162 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-29 06:10:35,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557157721] [2023-11-29 06:10:35,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234036586] [2023-11-29 06:10:35,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234036586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:35,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:35,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 06:10:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553940707] [2023-11-29 06:10:35,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:35,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:10:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:10:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:10:35,555 INFO L87 Difference]: Start difference. First operand 1493 states and 2318 transitions. Second operand has 18 states, 18 states have (on average 13.0) internal successors, (234), 18 states have internal predecessors, (234), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-29 06:10:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:37,670 INFO L93 Difference]: Finished difference Result 3920 states and 6063 transitions. [2023-11-29 06:10:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 06:10:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.0) internal successors, (234), 18 states have internal predecessors, (234), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) Word has length 456 [2023-11-29 06:10:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:37,676 INFO L225 Difference]: With dead ends: 3920 [2023-11-29 06:10:37,676 INFO L226 Difference]: Without dead ends: 2643 [2023-11-29 06:10:37,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 897 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 06:10:37,679 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 1334 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:37,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 2683 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:10:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2023-11-29 06:10:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 1532. [2023-11-29 06:10:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1279 states have (on average 1.4612978889757624) internal successors, (1869), 1281 states have internal predecessors, (1869), 231 states have call successors, (231), 21 states have call predecessors, (231), 21 states have return successors, (231), 229 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 06:10:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2331 transitions. [2023-11-29 06:10:37,831 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2331 transitions. Word has length 456 [2023-11-29 06:10:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:37,832 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 2331 transitions. [2023-11-29 06:10:37,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.0) internal successors, (234), 18 states have internal predecessors, (234), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-29 06:10:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2331 transitions. [2023-11-29 06:10:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-29 06:10:37,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:37,837 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:37,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 06:10:38,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:10:38,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:38,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -887603487, now seen corresponding path program 1 times [2023-11-29 06:10:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:38,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354923305] [2023-11-29 06:10:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:38,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:38,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803612259] [2023-11-29 06:10:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:38,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:38,086 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:38,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:10:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:38,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:10:38,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:10:38,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:10:38,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:38,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354923305] [2023-11-29 06:10:38,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803612259] [2023-11-29 06:10:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803612259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:10:38,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:10:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:10:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474424704] [2023-11-29 06:10:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:10:38,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:10:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:38,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:10:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:10:38,995 INFO L87 Difference]: Start difference. First operand 1532 states and 2331 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:39,373 INFO L93 Difference]: Finished difference Result 2301 states and 3507 transitions. [2023-11-29 06:10:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:10:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 456 [2023-11-29 06:10:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:39,377 INFO L225 Difference]: With dead ends: 2301 [2023-11-29 06:10:39,377 INFO L226 Difference]: Without dead ends: 1012 [2023-11-29 06:10:39,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:10:39,379 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 451 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:39,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 544 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:10:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-11-29 06:10:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1012. [2023-11-29 06:10:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 850 states have (on average 1.448235294117647) internal successors, (1231), 851 states have internal predecessors, (1231), 148 states have call successors, (148), 13 states have call predecessors, (148), 13 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-29 06:10:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1527 transitions. [2023-11-29 06:10:39,453 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1527 transitions. Word has length 456 [2023-11-29 06:10:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:39,454 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1527 transitions. [2023-11-29 06:10:39,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:10:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1527 transitions. [2023-11-29 06:10:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 06:10:39,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:39,458 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:10:39,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:10:39,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:10:39,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 814630566, now seen corresponding path program 1 times [2023-11-29 06:10:39,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:39,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360238898] [2023-11-29 06:10:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:39,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:39,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996382141] [2023-11-29 06:10:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:39,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:39,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:39,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:10:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:40,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:10:40,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4388 proven. 156 refuted. 0 times theorem prover too weak. 3776 trivial. 0 not checked. [2023-11-29 06:10:41,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:46,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:46,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360238898] [2023-11-29 06:10:46,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996382141] [2023-11-29 06:10:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996382141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:10:46,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:10:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-29 06:10:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044980507] [2023-11-29 06:10:46,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:46,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:10:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:10:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:10:46,069 INFO L87 Difference]: Start difference. First operand 1012 states and 1527 transitions. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 11 states have internal predecessors, (144), 3 states have call successors, (65), 3 states have call predecessors, (65), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-29 06:10:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:10:48,906 INFO L93 Difference]: Finished difference Result 3493 states and 5253 transitions. [2023-11-29 06:10:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:10:48,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 11 states have internal predecessors, (144), 3 states have call successors, (65), 3 states have call predecessors, (65), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) Word has length 457 [2023-11-29 06:10:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:10:48,914 INFO L225 Difference]: With dead ends: 3493 [2023-11-29 06:10:48,914 INFO L226 Difference]: Without dead ends: 2917 [2023-11-29 06:10:48,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 06:10:48,918 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 1437 mSDsluCounter, 2914 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:10:48,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 3367 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 06:10:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2023-11-29 06:10:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2387. [2023-11-29 06:10:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2096 states have (on average 1.4556297709923665) internal successors, (3051), 2102 states have internal predecessors, (3051), 263 states have call successors, (263), 27 states have call predecessors, (263), 27 states have return successors, (263), 257 states have call predecessors, (263), 263 states have call successors, (263) [2023-11-29 06:10:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 3577 transitions. [2023-11-29 06:10:49,133 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 3577 transitions. Word has length 457 [2023-11-29 06:10:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:10:49,134 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 3577 transitions. [2023-11-29 06:10:49,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 11 states have internal predecessors, (144), 3 states have call successors, (65), 3 states have call predecessors, (65), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-29 06:10:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 3577 transitions. [2023-11-29 06:10:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 06:10:49,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:10:49,138 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:10:49,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:10:49,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:10:49,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:10:49,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash 420263780, now seen corresponding path program 1 times [2023-11-29 06:10:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:49,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216388321] [2023-11-29 06:10:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:49,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:10:49,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476548655] [2023-11-29 06:10:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:49,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:49,387 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:49,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:10:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:49,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:10:49,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4343 proven. 318 refuted. 0 times theorem prover too weak. 3659 trivial. 0 not checked. [2023-11-29 06:10:53,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 60 proven. 321 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-29 06:10:57,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216388321] [2023-11-29 06:10:57,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:10:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476548655] [2023-11-29 06:10:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476548655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:10:57,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:10:57,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2023-11-29 06:10:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496959588] [2023-11-29 06:10:57,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:10:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:10:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:10:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:10:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:10:57,441 INFO L87 Difference]: Start difference. First operand 2387 states and 3577 transitions. Second operand has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 27 states have internal predecessors, (279), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:11:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:08,847 INFO L93 Difference]: Finished difference Result 8254 states and 12410 transitions. [2023-11-29 06:11:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 06:11:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 27 states have internal predecessors, (279), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) Word has length 457 [2023-11-29 06:11:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:08,859 INFO L225 Difference]: With dead ends: 8254 [2023-11-29 06:11:08,859 INFO L226 Difference]: Without dead ends: 6685 [2023-11-29 06:11:08,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3089, Invalid=7011, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 06:11:08,865 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 6243 mSDsluCounter, 6126 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 1418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6262 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1418 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:08,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6262 Valid, 6628 Invalid, 6864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1418 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-29 06:11:08,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2023-11-29 06:11:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 4457. [2023-11-29 06:11:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 3898 states have (on average 1.4604925602873269) internal successors, (5693), 3913 states have internal predecessors, (5693), 493 states have call successors, (493), 65 states have call predecessors, (493), 65 states have return successors, (493), 478 states have call predecessors, (493), 493 states have call successors, (493) [2023-11-29 06:11:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 6679 transitions. [2023-11-29 06:11:09,278 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 6679 transitions. Word has length 457 [2023-11-29 06:11:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:09,279 INFO L495 AbstractCegarLoop]: Abstraction has 4457 states and 6679 transitions. [2023-11-29 06:11:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 27 states have internal predecessors, (279), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:11:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 6679 transitions. [2023-11-29 06:11:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 06:11:09,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:09,286 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:09,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:11:09,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:11:09,486 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:09,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -980805780, now seen corresponding path program 1 times [2023-11-29 06:11:09,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:09,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081505630] [2023-11-29 06:11:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:09,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:09,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494135885] [2023-11-29 06:11:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:09,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:09,539 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:09,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:11:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:11:09,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2584 proven. 156 refuted. 0 times theorem prover too weak. 5580 trivial. 0 not checked. [2023-11-29 06:11:11,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:11:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081505630] [2023-11-29 06:11:13,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494135885] [2023-11-29 06:11:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494135885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:11:13,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:11:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-29 06:11:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105296912] [2023-11-29 06:11:13,747 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:11:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:11:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:11:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:11:13,749 INFO L87 Difference]: Start difference. First operand 4457 states and 6679 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 06:11:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:16,126 INFO L93 Difference]: Finished difference Result 7275 states and 10866 transitions. [2023-11-29 06:11:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:11:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 457 [2023-11-29 06:11:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:16,136 INFO L225 Difference]: With dead ends: 7275 [2023-11-29 06:11:16,136 INFO L226 Difference]: Without dead ends: 5177 [2023-11-29 06:11:16,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:11:16,140 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 334 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:16,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1553 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 06:11:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5177 states. [2023-11-29 06:11:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5177 to 4693. [2023-11-29 06:11:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4090 states have (on average 1.4618581907090464) internal successors, (5979), 4109 states have internal predecessors, (5979), 533 states have call successors, (533), 69 states have call predecessors, (533), 69 states have return successors, (533), 514 states have call predecessors, (533), 533 states have call successors, (533) [2023-11-29 06:11:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7045 transitions. [2023-11-29 06:11:16,704 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7045 transitions. Word has length 457 [2023-11-29 06:11:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:16,704 INFO L495 AbstractCegarLoop]: Abstraction has 4693 states and 7045 transitions. [2023-11-29 06:11:16,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 06:11:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7045 transitions. [2023-11-29 06:11:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 06:11:16,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:16,708 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:16,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:11:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:16,909 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:16,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1375172566, now seen corresponding path program 1 times [2023-11-29 06:11:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116002131] [2023-11-29 06:11:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:16,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:16,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:16,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325428438] [2023-11-29 06:11:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:16,961 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:16,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:11:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:17,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:11:17,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2584 proven. 156 refuted. 0 times theorem prover too weak. 5580 trivial. 0 not checked. [2023-11-29 06:11:18,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:11:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:11:18,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116002131] [2023-11-29 06:11:18,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325428438] [2023-11-29 06:11:18,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325428438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:11:18,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:11:18,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 06:11:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877012311] [2023-11-29 06:11:18,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:11:18,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:11:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:11:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:11:18,970 INFO L87 Difference]: Start difference. First operand 4693 states and 7045 transitions. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:11:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:21,380 INFO L93 Difference]: Finished difference Result 8956 states and 13418 transitions. [2023-11-29 06:11:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:11:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 457 [2023-11-29 06:11:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:21,398 INFO L225 Difference]: With dead ends: 8956 [2023-11-29 06:11:21,399 INFO L226 Difference]: Without dead ends: 6456 [2023-11-29 06:11:21,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:11:21,404 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1192 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:21,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2178 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 06:11:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2023-11-29 06:11:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 4549. [2023-11-29 06:11:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 3946 states have (on average 1.4523568170299037) internal successors, (5731), 3965 states have internal predecessors, (5731), 533 states have call successors, (533), 69 states have call predecessors, (533), 69 states have return successors, (533), 514 states have call predecessors, (533), 533 states have call successors, (533) [2023-11-29 06:11:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6797 transitions. [2023-11-29 06:11:21,940 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6797 transitions. Word has length 457 [2023-11-29 06:11:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:21,940 INFO L495 AbstractCegarLoop]: Abstraction has 4549 states and 6797 transitions. [2023-11-29 06:11:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:11:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6797 transitions. [2023-11-29 06:11:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-29 06:11:21,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:21,944 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:21,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:11:22,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-29 06:11:22,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:22,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1202749167, now seen corresponding path program 1 times [2023-11-29 06:11:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:22,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900736636] [2023-11-29 06:11:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:22,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:22,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615239489] [2023-11-29 06:11:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:22,198 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:22,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:11:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:22,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:11:22,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:11:22,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:22,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:22,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900736636] [2023-11-29 06:11:22,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:22,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615239489] [2023-11-29 06:11:22,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615239489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:22,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:22,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:11:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533505092] [2023-11-29 06:11:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:11:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:11:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:11:23,001 INFO L87 Difference]: Start difference. First operand 4549 states and 6797 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:23,833 INFO L93 Difference]: Finished difference Result 7895 states and 11807 transitions. [2023-11-29 06:11:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:11:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 458 [2023-11-29 06:11:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:23,840 INFO L225 Difference]: With dead ends: 7895 [2023-11-29 06:11:23,841 INFO L226 Difference]: Without dead ends: 4083 [2023-11-29 06:11:23,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:11:23,846 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 372 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:23,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1132 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:11:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2023-11-29 06:11:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 3990. [2023-11-29 06:11:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3387 states have (on average 1.4446412754650133) internal successors, (4893), 3406 states have internal predecessors, (4893), 533 states have call successors, (533), 69 states have call predecessors, (533), 69 states have return successors, (533), 514 states have call predecessors, (533), 533 states have call successors, (533) [2023-11-29 06:11:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 5959 transitions. [2023-11-29 06:11:24,330 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 5959 transitions. Word has length 458 [2023-11-29 06:11:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:24,331 INFO L495 AbstractCegarLoop]: Abstraction has 3990 states and 5959 transitions. [2023-11-29 06:11:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 5959 transitions. [2023-11-29 06:11:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 06:11:24,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:24,334 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:24,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:11:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:24,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:24,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1716550265, now seen corresponding path program 1 times [2023-11-29 06:11:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:24,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836269249] [2023-11-29 06:11:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:24,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:24,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256359385] [2023-11-29 06:11:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:24,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:24,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:11:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:25,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:11:25,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:11:25,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:25,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836269249] [2023-11-29 06:11:25,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256359385] [2023-11-29 06:11:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256359385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:25,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:25,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:11:25,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331157267] [2023-11-29 06:11:25,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:25,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:11:25,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:11:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:11:25,356 INFO L87 Difference]: Start difference. First operand 3990 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:27,169 INFO L93 Difference]: Finished difference Result 15986 states and 24013 transitions. [2023-11-29 06:11:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:11:27,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 459 [2023-11-29 06:11:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:27,184 INFO L225 Difference]: With dead ends: 15986 [2023-11-29 06:11:27,184 INFO L226 Difference]: Without dead ends: 12174 [2023-11-29 06:11:27,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:11:27,191 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 659 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:27,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 1509 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:11:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12174 states. [2023-11-29 06:11:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12174 to 11892. [2023-11-29 06:11:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11892 states, 10762 states have (on average 1.4744471287864709) internal successors, (15868), 10800 states have internal predecessors, (15868), 1001 states have call successors, (1001), 128 states have call predecessors, (1001), 128 states have return successors, (1001), 963 states have call predecessors, (1001), 1001 states have call successors, (1001) [2023-11-29 06:11:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11892 states to 11892 states and 17870 transitions. [2023-11-29 06:11:28,315 INFO L78 Accepts]: Start accepts. Automaton has 11892 states and 17870 transitions. Word has length 459 [2023-11-29 06:11:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:28,315 INFO L495 AbstractCegarLoop]: Abstraction has 11892 states and 17870 transitions. [2023-11-29 06:11:28,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11892 states and 17870 transitions. [2023-11-29 06:11:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:11:28,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:28,319 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:28,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:11:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:28,520 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:28,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1587364564, now seen corresponding path program 1 times [2023-11-29 06:11:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499618669] [2023-11-29 06:11:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:28,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220681478] [2023-11-29 06:11:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:28,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:28,568 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:28,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:11:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:29,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:11:29,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2062 proven. 165 refuted. 0 times theorem prover too weak. 6093 trivial. 0 not checked. [2023-11-29 06:11:31,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:11:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:11:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499618669] [2023-11-29 06:11:33,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220681478] [2023-11-29 06:11:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220681478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:11:33,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:11:33,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 06:11:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057646574] [2023-11-29 06:11:33,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:11:33,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:11:33,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:11:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:11:33,465 INFO L87 Difference]: Start difference. First operand 11892 states and 17870 transitions. Second operand has 20 states, 20 states have (on average 13.7) internal successors, (274), 20 states have internal predecessors, (274), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:11:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:43,138 INFO L93 Difference]: Finished difference Result 46354 states and 69763 transitions. [2023-11-29 06:11:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 06:11:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.7) internal successors, (274), 20 states have internal predecessors, (274), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 460 [2023-11-29 06:11:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:43,189 INFO L225 Difference]: With dead ends: 46354 [2023-11-29 06:11:43,189 INFO L226 Difference]: Without dead ends: 40836 [2023-11-29 06:11:43,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=647, Invalid=2215, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 06:11:43,202 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 2996 mSDsluCounter, 4532 mSDsCounter, 0 mSdLazyCounter, 3340 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 5086 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 3340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:43,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3075 Valid, 5086 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 3340 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 06:11:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40836 states. [2023-11-29 06:11:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40836 to 18574. [2023-11-29 06:11:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 17136 states have (on average 1.4784080298786182) internal successors, (25334), 17168 states have internal predecessors, (25334), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:11:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 27840 transitions. [2023-11-29 06:11:44,981 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 27840 transitions. Word has length 460 [2023-11-29 06:11:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:44,982 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 27840 transitions. [2023-11-29 06:11:44,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.7) internal successors, (274), 20 states have internal predecessors, (274), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:11:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 27840 transitions. [2023-11-29 06:11:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:11:44,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:44,987 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:44,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:11:45,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:45,187 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:45,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1869265116, now seen corresponding path program 1 times [2023-11-29 06:11:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:45,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983779072] [2023-11-29 06:11:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:45,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:45,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7655673] [2023-11-29 06:11:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:45,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:45,237 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:45,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:11:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:45,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:11:45,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:11:46,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983779072] [2023-11-29 06:11:46,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7655673] [2023-11-29 06:11:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7655673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:46,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:11:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424340006] [2023-11-29 06:11:46,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:11:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:11:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:11:46,161 INFO L87 Difference]: Start difference. First operand 18574 states and 27840 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:48,107 INFO L93 Difference]: Finished difference Result 36026 states and 53970 transitions. [2023-11-29 06:11:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:11:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 460 [2023-11-29 06:11:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:48,134 INFO L225 Difference]: With dead ends: 36026 [2023-11-29 06:11:48,134 INFO L226 Difference]: Without dead ends: 18800 [2023-11-29 06:11:48,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:11:48,153 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 309 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:48,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1150 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:11:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18800 states. [2023-11-29 06:11:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18800 to 18574. [2023-11-29 06:11:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 17136 states have (on average 1.4783496732026145) internal successors, (25333), 17168 states have internal predecessors, (25333), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:11:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 27839 transitions. [2023-11-29 06:11:49,722 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 27839 transitions. Word has length 460 [2023-11-29 06:11:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:49,723 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 27839 transitions. [2023-11-29 06:11:49,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 27839 transitions. [2023-11-29 06:11:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:11:49,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:49,730 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:49,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:11:49,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:49,931 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:49,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1644825814, now seen corresponding path program 1 times [2023-11-29 06:11:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:49,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513711522] [2023-11-29 06:11:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:50,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:50,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815289494] [2023-11-29 06:11:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:50,004 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:50,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:11:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:50,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:11:50,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:11:51,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513711522] [2023-11-29 06:11:51,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815289494] [2023-11-29 06:11:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815289494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:51,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:51,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:11:51,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012919053] [2023-11-29 06:11:51,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:51,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:11:51,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:11:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:11:51,398 INFO L87 Difference]: Start difference. First operand 18574 states and 27839 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:11:54,146 INFO L93 Difference]: Finished difference Result 36026 states and 53969 transitions. [2023-11-29 06:11:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:11:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 460 [2023-11-29 06:11:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:11:54,168 INFO L225 Difference]: With dead ends: 36026 [2023-11-29 06:11:54,168 INFO L226 Difference]: Without dead ends: 18800 [2023-11-29 06:11:54,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:11:54,186 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 304 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:11:54,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1114 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 06:11:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18800 states. [2023-11-29 06:11:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18800 to 18574. [2023-11-29 06:11:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 17136 states have (on average 1.4782913165266107) internal successors, (25332), 17168 states have internal predecessors, (25332), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:11:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 27838 transitions. [2023-11-29 06:11:55,897 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 27838 transitions. Word has length 460 [2023-11-29 06:11:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:11:55,898 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 27838 transitions. [2023-11-29 06:11:55,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:11:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 27838 transitions. [2023-11-29 06:11:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:11:55,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:11:55,903 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:11:55,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:11:56,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:56,104 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:11:56,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:11:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1766632492, now seen corresponding path program 1 times [2023-11-29 06:11:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:11:56,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388896470] [2023-11-29 06:11:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:56,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:11:56,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:11:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184612900] [2023-11-29 06:11:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:11:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:11:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:11:56,154 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:11:56,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:11:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:11:56,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:11:56,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:11:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:11:58,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:11:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:11:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388896470] [2023-11-29 06:11:58,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:11:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184612900] [2023-11-29 06:11:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184612900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:11:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:11:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:11:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767952079] [2023-11-29 06:11:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:11:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:11:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:11:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:11:58,424 INFO L87 Difference]: Start difference. First operand 18574 states and 27838 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:00,711 INFO L93 Difference]: Finished difference Result 39676 states and 59363 transitions. [2023-11-29 06:12:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:12:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 460 [2023-11-29 06:12:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:00,734 INFO L225 Difference]: With dead ends: 39676 [2023-11-29 06:12:00,734 INFO L226 Difference]: Without dead ends: 21366 [2023-11-29 06:12:00,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:12:00,747 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 870 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:00,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1564 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:12:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21366 states. [2023-11-29 06:12:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21366 to 20978. [2023-11-29 06:12:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 19540 states have (on average 1.4781985670419653) internal successors, (28884), 19572 states have internal predecessors, (28884), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:12:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 31390 transitions. [2023-11-29 06:12:02,270 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 31390 transitions. Word has length 460 [2023-11-29 06:12:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:02,271 INFO L495 AbstractCegarLoop]: Abstraction has 20978 states and 31390 transitions. [2023-11-29 06:12:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 31390 transitions. [2023-11-29 06:12:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:12:02,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:02,278 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:02,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 06:12:02,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:02,481 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:02,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash 617292246, now seen corresponding path program 1 times [2023-11-29 06:12:02,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:02,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143121939] [2023-11-29 06:12:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:02,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:02,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127152493] [2023-11-29 06:12:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:02,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:02,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:02,533 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:02,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:12:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:03,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:12:03,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:12:03,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:12:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143121939] [2023-11-29 06:12:03,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127152493] [2023-11-29 06:12:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127152493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:12:03,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:12:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:12:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744220556] [2023-11-29 06:12:03,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:12:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:12:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:12:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:12:03,954 INFO L87 Difference]: Start difference. First operand 20978 states and 31390 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:06,050 INFO L93 Difference]: Finished difference Result 37234 states and 55734 transitions. [2023-11-29 06:12:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:12:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 460 [2023-11-29 06:12:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:06,070 INFO L225 Difference]: With dead ends: 37234 [2023-11-29 06:12:06,070 INFO L226 Difference]: Without dead ends: 18800 [2023-11-29 06:12:06,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:12:06,083 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 463 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:06,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1107 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:12:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18800 states. [2023-11-29 06:12:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18800 to 18638. [2023-11-29 06:12:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18638 states, 17200 states have (on average 1.476279069767442) internal successors, (25392), 17232 states have internal predecessors, (25392), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:12:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18638 states to 18638 states and 27898 transitions. [2023-11-29 06:12:07,578 INFO L78 Accepts]: Start accepts. Automaton has 18638 states and 27898 transitions. Word has length 460 [2023-11-29 06:12:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:07,579 INFO L495 AbstractCegarLoop]: Abstraction has 18638 states and 27898 transitions. [2023-11-29 06:12:07,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 18638 states and 27898 transitions. [2023-11-29 06:12:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:12:07,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:07,586 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:07,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 06:12:07,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:12:07,787 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:07,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash -441776298, now seen corresponding path program 1 times [2023-11-29 06:12:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746631724] [2023-11-29 06:12:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:07,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:07,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377470724] [2023-11-29 06:12:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:07,843 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:12:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:08,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:12:08,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:12:09,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:12:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746631724] [2023-11-29 06:12:09,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377470724] [2023-11-29 06:12:09,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377470724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:12:09,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:12:09,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:12:09,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388286097] [2023-11-29 06:12:09,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:12:09,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:12:09,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:12:09,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:12:09,926 INFO L87 Difference]: Start difference. First operand 18638 states and 27898 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:12,066 INFO L93 Difference]: Finished difference Result 37174 states and 55606 transitions. [2023-11-29 06:12:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:12:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 460 [2023-11-29 06:12:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:12,085 INFO L225 Difference]: With dead ends: 37174 [2023-11-29 06:12:12,085 INFO L226 Difference]: Without dead ends: 18800 [2023-11-29 06:12:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:12:12,095 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 402 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:12,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1360 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:12:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18800 states. [2023-11-29 06:12:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18800 to 18638. [2023-11-29 06:12:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18638 states, 17200 states have (on average 1.475813953488372) internal successors, (25384), 17232 states have internal predecessors, (25384), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:12:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18638 states to 18638 states and 27890 transitions. [2023-11-29 06:12:13,583 INFO L78 Accepts]: Start accepts. Automaton has 18638 states and 27890 transitions. Word has length 460 [2023-11-29 06:12:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:13,583 INFO L495 AbstractCegarLoop]: Abstraction has 18638 states and 27890 transitions. [2023-11-29 06:12:13,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:12:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 18638 states and 27890 transitions. [2023-11-29 06:12:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 06:12:13,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:13,590 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:13,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:12:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:13,791 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:13,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1942148440, now seen corresponding path program 1 times [2023-11-29 06:12:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630174752] [2023-11-29 06:12:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:13,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607851001] [2023-11-29 06:12:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:13,842 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:13,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:12:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:14,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:12:14,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2062 proven. 165 refuted. 0 times theorem prover too weak. 6093 trivial. 0 not checked. [2023-11-29 06:12:15,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:12:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:12:15,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630174752] [2023-11-29 06:12:15,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607851001] [2023-11-29 06:12:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607851001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:12:15,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:12:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 06:12:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026377447] [2023-11-29 06:12:15,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:12:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:12:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:12:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:12:15,689 INFO L87 Difference]: Start difference. First operand 18638 states and 27890 transitions. Second operand has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:12:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:19,382 INFO L93 Difference]: Finished difference Result 47454 states and 70870 transitions. [2023-11-29 06:12:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:12:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 460 [2023-11-29 06:12:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:19,417 INFO L225 Difference]: With dead ends: 47454 [2023-11-29 06:12:19,417 INFO L226 Difference]: Without dead ends: 29104 [2023-11-29 06:12:19,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:12:19,432 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 1944 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:19,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2007 Valid, 1872 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 06:12:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29104 states. [2023-11-29 06:12:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29104 to 18638. [2023-11-29 06:12:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18638 states, 17200 states have (on average 1.4753488372093024) internal successors, (25376), 17232 states have internal predecessors, (25376), 1253 states have call successors, (1253), 184 states have call predecessors, (1253), 184 states have return successors, (1253), 1221 states have call predecessors, (1253), 1253 states have call successors, (1253) [2023-11-29 06:12:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18638 states to 18638 states and 27882 transitions. [2023-11-29 06:12:21,026 INFO L78 Accepts]: Start accepts. Automaton has 18638 states and 27882 transitions. Word has length 460 [2023-11-29 06:12:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:21,026 INFO L495 AbstractCegarLoop]: Abstraction has 18638 states and 27882 transitions. [2023-11-29 06:12:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:12:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18638 states and 27882 transitions. [2023-11-29 06:12:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:12:21,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:21,031 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:21,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:12:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:12:21,232 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:21,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1434638936, now seen corresponding path program 1 times [2023-11-29 06:12:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:21,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260232164] [2023-11-29 06:12:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:21,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:21,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156112915] [2023-11-29 06:12:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:21,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:21,272 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:21,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:12:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:21,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:12:21,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1468 proven. 174 refuted. 0 times theorem prover too weak. 6678 trivial. 0 not checked. [2023-11-29 06:12:22,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:12:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 18 proven. 174 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-29 06:12:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260232164] [2023-11-29 06:12:23,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156112915] [2023-11-29 06:12:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156112915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:12:23,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:12:23,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 06:12:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185280324] [2023-11-29 06:12:23,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:12:23,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:12:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:12:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:12:23,215 INFO L87 Difference]: Start difference. First operand 18638 states and 27882 transitions. Second operand has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:12:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:30,006 INFO L93 Difference]: Finished difference Result 76788 states and 114991 transitions. [2023-11-29 06:12:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:12:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 461 [2023-11-29 06:12:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:30,062 INFO L225 Difference]: With dead ends: 76788 [2023-11-29 06:12:30,062 INFO L226 Difference]: Without dead ends: 58438 [2023-11-29 06:12:30,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:12:30,076 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 3805 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3869 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:30,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3869 Valid, 3930 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 06:12:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58438 states. [2023-11-29 06:12:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58438 to 29850. [2023-11-29 06:12:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29850 states, 27422 states have (on average 1.4755305958719276) internal successors, (40462), 27514 states have internal predecessors, (40462), 2111 states have call successors, (2111), 316 states have call predecessors, (2111), 316 states have return successors, (2111), 2019 states have call predecessors, (2111), 2111 states have call successors, (2111) [2023-11-29 06:12:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29850 states to 29850 states and 44684 transitions. [2023-11-29 06:12:33,357 INFO L78 Accepts]: Start accepts. Automaton has 29850 states and 44684 transitions. Word has length 461 [2023-11-29 06:12:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:33,358 INFO L495 AbstractCegarLoop]: Abstraction has 29850 states and 44684 transitions. [2023-11-29 06:12:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-29 06:12:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29850 states and 44684 transitions. [2023-11-29 06:12:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:12:33,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:33,364 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:33,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:12:33,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:33,565 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:33,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1892977706, now seen corresponding path program 1 times [2023-11-29 06:12:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:33,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167172684] [2023-11-29 06:12:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:33,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:33,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954344536] [2023-11-29 06:12:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:33,609 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:33,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:12:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:34,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:12:34,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2232 proven. 495 refuted. 0 times theorem prover too weak. 5593 trivial. 0 not checked. [2023-11-29 06:12:36,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:12:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-29 06:12:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167172684] [2023-11-29 06:12:38,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954344536] [2023-11-29 06:12:38,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954344536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:12:38,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:12:38,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-11-29 06:12:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781430547] [2023-11-29 06:12:38,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:12:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:12:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:12:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:12:38,400 INFO L87 Difference]: Start difference. First operand 29850 states and 44684 transitions. Second operand has 23 states, 23 states have (on average 10.478260869565217) internal successors, (241), 22 states have internal predecessors, (241), 6 states have call successors, (123), 4 states have call predecessors, (123), 8 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-29 06:12:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:12:46,737 INFO L93 Difference]: Finished difference Result 79053 states and 117479 transitions. [2023-11-29 06:12:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 06:12:46,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.478260869565217) internal successors, (241), 22 states have internal predecessors, (241), 6 states have call successors, (123), 4 states have call predecessors, (123), 8 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) Word has length 461 [2023-11-29 06:12:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:12:46,793 INFO L225 Difference]: With dead ends: 79053 [2023-11-29 06:12:46,793 INFO L226 Difference]: Without dead ends: 51975 [2023-11-29 06:12:46,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 900 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=841, Invalid=2581, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 06:12:46,813 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 2065 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:12:46,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 2189 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 06:12:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51975 states. [2023-11-29 06:12:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51975 to 36845. [2023-11-29 06:12:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36845 states, 34706 states have (on average 1.4722814498933903) internal successors, (51097), 34748 states have internal predecessors, (51097), 1763 states have call successors, (1763), 375 states have call predecessors, (1763), 375 states have return successors, (1763), 1721 states have call predecessors, (1763), 1763 states have call successors, (1763) [2023-11-29 06:12:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36845 states to 36845 states and 54623 transitions. [2023-11-29 06:12:50,016 INFO L78 Accepts]: Start accepts. Automaton has 36845 states and 54623 transitions. Word has length 461 [2023-11-29 06:12:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:12:50,016 INFO L495 AbstractCegarLoop]: Abstraction has 36845 states and 54623 transitions. [2023-11-29 06:12:50,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.478260869565217) internal successors, (241), 22 states have internal predecessors, (241), 6 states have call successors, (123), 4 states have call predecessors, (123), 8 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-29 06:12:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 36845 states and 54623 transitions. [2023-11-29 06:12:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:12:50,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:12:50,023 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:12:50,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:12:50,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:50,224 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:12:50,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash -636538228, now seen corresponding path program 1 times [2023-11-29 06:12:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:50,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966333039] [2023-11-29 06:12:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:50,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:12:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059624352] [2023-11-29 06:12:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:50,273 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:50,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:12:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:50,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:12:50,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4983 proven. 279 refuted. 0 times theorem prover too weak. 3058 trivial. 0 not checked. [2023-11-29 06:12:53,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:12:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 279 proven. 288 refuted. 0 times theorem prover too weak. 7753 trivial. 0 not checked. [2023-11-29 06:12:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966333039] [2023-11-29 06:12:55,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:12:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059624352] [2023-11-29 06:12:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059624352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:12:55,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:12:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-11-29 06:12:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896294082] [2023-11-29 06:12:55,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:12:55,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:12:55,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:12:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:12:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:12:55,611 INFO L87 Difference]: Start difference. First operand 36845 states and 54623 transitions. Second operand has 30 states, 29 states have (on average 10.0) internal successors, (290), 28 states have internal predecessors, (290), 8 states have call successors, (130), 5 states have call predecessors, (130), 10 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:13:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:13:13,762 INFO L93 Difference]: Finished difference Result 129493 states and 191050 transitions. [2023-11-29 06:13:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 06:13:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 10.0) internal successors, (290), 28 states have internal predecessors, (290), 8 states have call successors, (130), 5 states have call predecessors, (130), 10 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) Word has length 461 [2023-11-29 06:13:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:13:13,856 INFO L225 Difference]: With dead ends: 129493 [2023-11-29 06:13:13,857 INFO L226 Difference]: Without dead ends: 95934 [2023-11-29 06:13:13,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2392, Invalid=6350, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 06:13:13,879 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 4775 mSDsluCounter, 4599 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 1246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4816 SdHoareTripleChecker+Valid, 4976 SdHoareTripleChecker+Invalid, 5140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1246 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:13:13,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4816 Valid, 4976 Invalid, 5140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1246 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 06:13:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95934 states. [2023-11-29 06:13:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95934 to 49718. [2023-11-29 06:13:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49718 states, 47558 states have (on average 1.4564952268808613) internal successors, (69268), 47597 states have internal predecessors, (69268), 1745 states have call successors, (1745), 414 states have call predecessors, (1745), 414 states have return successors, (1745), 1706 states have call predecessors, (1745), 1745 states have call successors, (1745) [2023-11-29 06:13:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49718 states to 49718 states and 72758 transitions. [2023-11-29 06:13:17,316 INFO L78 Accepts]: Start accepts. Automaton has 49718 states and 72758 transitions. Word has length 461 [2023-11-29 06:13:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:13:17,316 INFO L495 AbstractCegarLoop]: Abstraction has 49718 states and 72758 transitions. [2023-11-29 06:13:17,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 10.0) internal successors, (290), 28 states have internal predecessors, (290), 8 states have call successors, (130), 5 states have call predecessors, (130), 10 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:13:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49718 states and 72758 transitions. [2023-11-29 06:13:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:13:17,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:13:17,324 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:13:17,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:13:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 06:13:17,524 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:13:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash -354637676, now seen corresponding path program 1 times [2023-11-29 06:13:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:17,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13659378] [2023-11-29 06:13:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:17,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:17,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:13:17,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606381646] [2023-11-29 06:13:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:17,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:17,573 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:17,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:13:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:18,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:13:18,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2232 proven. 495 refuted. 0 times theorem prover too weak. 5593 trivial. 0 not checked. [2023-11-29 06:13:20,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 36 proven. 345 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-29 06:13:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13659378] [2023-11-29 06:13:26,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:13:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606381646] [2023-11-29 06:13:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606381646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:26,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:13:26,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2023-11-29 06:13:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62107057] [2023-11-29 06:13:26,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:13:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:13:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:13:26,638 INFO L87 Difference]: Start difference. First operand 49718 states and 72758 transitions. Second operand has 28 states, 27 states have (on average 9.925925925925926) internal successors, (268), 26 states have internal predecessors, (268), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:13:30,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:13:33,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:14:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:14:08,710 INFO L93 Difference]: Finished difference Result 305808 states and 453587 transitions. [2023-11-29 06:14:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 06:14:08,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 9.925925925925926) internal successors, (268), 26 states have internal predecessors, (268), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) Word has length 461 [2023-11-29 06:14:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:14:09,135 INFO L225 Difference]: With dead ends: 305808 [2023-11-29 06:14:09,135 INFO L226 Difference]: Without dead ends: 259208 [2023-11-29 06:14:09,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4788 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2586, Invalid=9846, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 06:14:09,172 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 4989 mSDsluCounter, 8160 mSDsCounter, 0 mSdLazyCounter, 6384 mSolverCounterSat, 1482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4998 SdHoareTripleChecker+Valid, 8998 SdHoareTripleChecker+Invalid, 7866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1482 IncrementalHoareTripleChecker+Valid, 6384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:14:09,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4998 Valid, 8998 Invalid, 7866 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1482 Valid, 6384 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2023-11-29 06:14:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259208 states. [2023-11-29 06:14:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259208 to 96775. [2023-11-29 06:14:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96775 states, 91579 states have (on average 1.45115146485548) internal successors, (132895), 91667 states have internal predecessors, (132895), 4192 states have call successors, (4192), 1003 states have call predecessors, (4192), 1003 states have return successors, (4192), 4104 states have call predecessors, (4192), 4192 states have call successors, (4192) [2023-11-29 06:14:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96775 states to 96775 states and 141279 transitions. [2023-11-29 06:14:19,365 INFO L78 Accepts]: Start accepts. Automaton has 96775 states and 141279 transitions. Word has length 461 [2023-11-29 06:14:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:14:19,366 INFO L495 AbstractCegarLoop]: Abstraction has 96775 states and 141279 transitions. [2023-11-29 06:14:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 9.925925925925926) internal successors, (268), 26 states have internal predecessors, (268), 8 states have call successors, (130), 5 states have call predecessors, (130), 9 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 06:14:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 96775 states and 141279 transitions. [2023-11-29 06:14:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:14:19,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:14:19,377 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:14:19,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:14:19,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 06:14:19,578 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:14:19,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1921395626, now seen corresponding path program 1 times [2023-11-29 06:14:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:19,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824776458] [2023-11-29 06:14:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:19,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:19,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:14:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193388174] [2023-11-29 06:14:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:19,622 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:19,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:14:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:14:20,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:14:20,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4222 proven. 93 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2023-11-29 06:14:21,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:14:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 06:14:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:14:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824776458] [2023-11-29 06:14:21,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:14:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193388174] [2023-11-29 06:14:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193388174] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:14:21,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:14:21,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-29 06:14:21,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938122586] [2023-11-29 06:14:21,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:14:21,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:14:21,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:14:21,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:14:21,317 INFO L87 Difference]: Start difference. First operand 96775 states and 141279 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:14:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:14:36,028 INFO L93 Difference]: Finished difference Result 282034 states and 417115 transitions. [2023-11-29 06:14:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:14:36,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 461 [2023-11-29 06:14:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:14:36,228 INFO L225 Difference]: With dead ends: 282034 [2023-11-29 06:14:36,229 INFO L226 Difference]: Without dead ends: 192906 [2023-11-29 06:14:36,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:14:36,270 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 285 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:14:36,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1395 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:14:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192906 states. [2023-11-29 06:14:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192906 to 165281. [2023-11-29 06:14:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165281 states, 156628 states have (on average 1.4443394539929004) internal successors, (226224), 156846 states have internal predecessors, (226224), 6879 states have call successors, (6879), 1773 states have call predecessors, (6879), 1773 states have return successors, (6879), 6661 states have call predecessors, (6879), 6879 states have call successors, (6879) [2023-11-29 06:14:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165281 states to 165281 states and 239982 transitions. [2023-11-29 06:14:52,868 INFO L78 Accepts]: Start accepts. Automaton has 165281 states and 239982 transitions. Word has length 461 [2023-11-29 06:14:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:14:52,869 INFO L495 AbstractCegarLoop]: Abstraction has 165281 states and 239982 transitions. [2023-11-29 06:14:52,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-29 06:14:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 165281 states and 239982 transitions. [2023-11-29 06:14:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:14:52,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:14:52,892 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:14:52,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 06:14:53,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 06:14:53,093 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:14:53,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:14:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1702540908, now seen corresponding path program 1 times [2023-11-29 06:14:53,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:14:53,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525738719] [2023-11-29 06:14:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:14:53,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:14:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226455143] [2023-11-29 06:14:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:14:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:14:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:14:53,138 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:14:53,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:14:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:14:54,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:14:54,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:14:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1528 proven. 342 refuted. 0 times theorem prover too weak. 6450 trivial. 0 not checked. [2023-11-29 06:14:59,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 36 proven. 345 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-29 06:15:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525738719] [2023-11-29 06:15:00,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:15:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226455143] [2023-11-29 06:15:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226455143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:00,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:15:00,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 06:15:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581442344] [2023-11-29 06:15:00,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:00,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:15:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:15:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:15:00,829 INFO L87 Difference]: Start difference. First operand 165281 states and 239982 transitions. Second operand has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 6 states have call successors, (130), 4 states have call predecessors, (130), 7 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-29 06:15:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:15:26,704 INFO L93 Difference]: Finished difference Result 358530 states and 524711 transitions. [2023-11-29 06:15:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:15:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 6 states have call successors, (130), 4 states have call predecessors, (130), 7 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) Word has length 461 [2023-11-29 06:15:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:15:26,956 INFO L225 Difference]: With dead ends: 358530 [2023-11-29 06:15:26,956 INFO L226 Difference]: Without dead ends: 200696 [2023-11-29 06:15:27,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:15:27,050 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1483 mSDsluCounter, 2567 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:15:27,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 2886 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 06:15:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200696 states. [2023-11-29 06:15:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200696 to 155721. [2023-11-29 06:15:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155721 states, 147068 states have (on average 1.4457121875594963) internal successors, (212618), 147286 states have internal predecessors, (212618), 6879 states have call successors, (6879), 1773 states have call predecessors, (6879), 1773 states have return successors, (6879), 6661 states have call predecessors, (6879), 6879 states have call successors, (6879) [2023-11-29 06:15:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155721 states to 155721 states and 226376 transitions. [2023-11-29 06:15:45,325 INFO L78 Accepts]: Start accepts. Automaton has 155721 states and 226376 transitions. Word has length 461 [2023-11-29 06:15:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:15:45,326 INFO L495 AbstractCegarLoop]: Abstraction has 155721 states and 226376 transitions. [2023-11-29 06:15:45,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 16 states have internal predecessors, (218), 6 states have call successors, (130), 4 states have call predecessors, (130), 7 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-29 06:15:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 155721 states and 226376 transitions. [2023-11-29 06:15:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:15:45,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:15:45,347 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:15:45,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:15:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 06:15:45,548 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:15:45,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 233188938, now seen corresponding path program 1 times [2023-11-29 06:15:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256470838] [2023-11-29 06:15:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:45,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:15:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507910369] [2023-11-29 06:15:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:45,589 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:45,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:15:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:46,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:15:46,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 5974 proven. 399 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2023-11-29 06:15:48,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 333 proven. 417 refuted. 0 times theorem prover too weak. 7570 trivial. 0 not checked. [2023-11-29 06:15:51,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:51,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256470838] [2023-11-29 06:15:51,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:15:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507910369] [2023-11-29 06:15:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507910369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:51,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:15:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2023-11-29 06:15:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548179961] [2023-11-29 06:15:51,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:15:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:15:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:15:51,941 INFO L87 Difference]: Start difference. First operand 155721 states and 226376 transitions. Second operand has 38 states, 37 states have (on average 8.08108108108108) internal successors, (299), 36 states have internal predecessors, (299), 10 states have call successors, (130), 6 states have call predecessors, (130), 13 states have return successors, (130), 10 states have call predecessors, (130), 10 states have call successors, (130) [2023-11-29 06:17:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:17:12,758 INFO L93 Difference]: Finished difference Result 498203 states and 727392 transitions. [2023-11-29 06:17:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 06:17:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 8.08108108108108) internal successors, (299), 36 states have internal predecessors, (299), 10 states have call successors, (130), 6 states have call predecessors, (130), 13 states have return successors, (130), 10 states have call predecessors, (130), 10 states have call successors, (130) Word has length 461 [2023-11-29 06:17:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:17:13,401 INFO L225 Difference]: With dead ends: 498203 [2023-11-29 06:17:13,401 INFO L226 Difference]: Without dead ends: 354563 [2023-11-29 06:17:13,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4056, Invalid=11946, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 06:17:13,491 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 4128 mSDsluCounter, 5926 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 1103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4158 SdHoareTripleChecker+Valid, 6309 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1103 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:17:13,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4158 Valid, 6309 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1103 Valid, 5420 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-11-29 06:17:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354563 states. [2023-11-29 06:17:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354563 to 148981. [2023-11-29 06:17:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148981 states, 140242 states have (on average 1.4512485560673694) internal successors, (203526), 140460 states have internal predecessors, (203526), 6879 states have call successors, (6879), 1859 states have call predecessors, (6879), 1859 states have return successors, (6879), 6661 states have call predecessors, (6879), 6879 states have call successors, (6879) [2023-11-29 06:17:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148981 states to 148981 states and 217284 transitions. [2023-11-29 06:17:34,580 INFO L78 Accepts]: Start accepts. Automaton has 148981 states and 217284 transitions. Word has length 461 [2023-11-29 06:17:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:17:34,581 INFO L495 AbstractCegarLoop]: Abstraction has 148981 states and 217284 transitions. [2023-11-29 06:17:34,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 8.08108108108108) internal successors, (299), 36 states have internal predecessors, (299), 10 states have call successors, (130), 6 states have call predecessors, (130), 13 states have return successors, (130), 10 states have call predecessors, (130), 10 states have call successors, (130) [2023-11-29 06:17:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 148981 states and 217284 transitions. [2023-11-29 06:17:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 06:17:34,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:17:34,595 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 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, 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, 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, 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, 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, 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, 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, 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, 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 06:17:34,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 06:17:34,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 06:17:34,796 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:17:34,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:17:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 515089490, now seen corresponding path program 1 times [2023-11-29 06:17:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:17:34,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758110220] [2023-11-29 06:17:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:17:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:17:34,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:17:34,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290863491] [2023-11-29 06:17:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:17:34,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:17:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:17:34,840 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:17:34,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606b8ca6-2990-499a-9a70-6dfb5820fcec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:22:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:01,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:22:01,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 5019 proven. 555 refuted. 0 times theorem prover too weak. 2746 trivial. 0 not checked. [2023-11-29 06:22:04,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:13,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758110220] [2023-11-29 06:22:13,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:22:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290863491] [2023-11-29 06:22:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290863491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:13,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:22:13,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 06:22:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970374664] [2023-11-29 06:22:13,588 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:13,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:22:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:22:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:22:13,590 INFO L87 Difference]: Start difference. First operand 148981 states and 217284 transitions. Second operand has 16 states, 16 states have (on average 10.0) internal successors, (160), 14 states have internal predecessors, (160), 5 states have call successors, (65), 5 states have call predecessors, (65), 8 states have return successors, (65), 5 states have call predecessors, (65), 5 states have call successors, (65) [2023-11-29 06:22:55,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:23:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:23:04,724 INFO L93 Difference]: Finished difference Result 491803 states and 716295 transitions. [2023-11-29 06:23:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:23:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.0) internal successors, (160), 14 states have internal predecessors, (160), 5 states have call successors, (65), 5 states have call predecessors, (65), 8 states have return successors, (65), 5 states have call predecessors, (65), 5 states have call successors, (65) Word has length 461 [2023-11-29 06:23:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:23:05,203 INFO L225 Difference]: With dead ends: 491803 [2023-11-29 06:23:05,203 INFO L226 Difference]: Without dead ends: 350825 [2023-11-29 06:23:05,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:23:05,300 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1174 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:23:05,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 2319 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 06:23:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350825 states.