./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.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_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/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_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/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_19393d65-4e26-4a13-a2cc-7eed90404ef0/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 a38816720abe2c19fbd70680349ed59f349bca0e0acac641469a31f37cd07bb9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:07:19,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:07:19,188 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:07:19,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:07:19,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:07:19,214 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:07:19,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:07:19,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:07:19,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:07:19,216 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:07:19,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:07:19,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:07:19,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:07:19,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:07:19,219 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:07:19,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:07:19,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:07:19,220 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:07:19,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:07:19,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:07:19,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:07:19,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:07:19,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:07:19,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:07:19,224 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:07:19,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:07:19,225 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:07:19,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:07:19,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:07:19,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:07:19,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:07:19,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:07:19,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:07:19,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:07:19,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:07:19,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:07:19,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:07:19,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:07:19,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:07:19,228 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:07:19,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:07:19,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:07:19,229 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_19393d65-4e26-4a13-a2cc-7eed90404ef0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a38816720abe2c19fbd70680349ed59f349bca0e0acac641469a31f37cd07bb9 [2023-11-29 00:07:19,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:07:19,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:07:19,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:07:19,470 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:07:19,470 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:07:19,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i [2023-11-29 00:07:22,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:07:22,447 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:07:22,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i [2023-11-29 00:07:22,465 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/data/1e913a501/65a78f7ac5fb45328cd44b349558cac1/FLAGb32003367 [2023-11-29 00:07:22,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/data/1e913a501/65a78f7ac5fb45328cd44b349558cac1 [2023-11-29 00:07:22,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:07:22,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:07:22,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:07:22,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:07:22,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:07:22,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:07:22" (1/1) ... [2023-11-29 00:07:22,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e56ef0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:22, skipping insertion in model container [2023-11-29 00:07:22,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:07:22" (1/1) ... [2023-11-29 00:07:22,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:07:22,704 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_19393d65-4e26-4a13-a2cc-7eed90404ef0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i[916,929] [2023-11-29 00:07:22,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:07:22,942 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:07:22,954 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_19393d65-4e26-4a13-a2cc-7eed90404ef0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i[916,929] [2023-11-29 00:07:23,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:07:23,090 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:07:23,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23 WrapperNode [2023-11-29 00:07:23,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:07:23,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:07:23,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:07:23,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:07:23,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,298 INFO L138 Inliner]: procedures = 26, calls = 90, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 682 [2023-11-29 00:07:23,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:07:23,299 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:07:23,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:07:23,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:07:23,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,379 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:07:23,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,411 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:07:23,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:07:23,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:07:23,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:07:23,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (1/1) ... [2023-11-29 00:07:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:07:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:23,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:07:23,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:07:23,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:07:23,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:07:23,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:07:23,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:07:23,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:07:23,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:07:23,699 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:07:23,701 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:07:24,727 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:07:24,773 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:07:24,773 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:07:24,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:07:24 BoogieIcfgContainer [2023-11-29 00:07:24,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:07:24,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:07:24,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:07:24,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:07:24,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:07:22" (1/3) ... [2023-11-29 00:07:24,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b84e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:07:24, skipping insertion in model container [2023-11-29 00:07:24,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:07:23" (2/3) ... [2023-11-29 00:07:24,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b84e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:07:24, skipping insertion in model container [2023-11-29 00:07:24,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:07:24" (3/3) ... [2023-11-29 00:07:24,782 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-84.i [2023-11-29 00:07:24,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:07:24,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:07:24,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:07:24,848 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;@109be20c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:07:24,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:07:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 268 states, 188 states have (on average 1.6063829787234043) internal successors, (302), 189 states have internal predecessors, (302), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:07:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:24,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:24,883 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:24,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:24,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash -605701111, now seen corresponding path program 1 times [2023-11-29 00:07:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:24,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568964062] [2023-11-29 00:07:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:25,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568964062] [2023-11-29 00:07:25,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:07:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764089033] [2023-11-29 00:07:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:25,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:25,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:25,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:07:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:25,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:07:25,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2023-11-29 00:07:25,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764089033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:07:25,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:07:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970430604] [2023-11-29 00:07:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:07:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:07:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:07:25,814 INFO L87 Difference]: Start difference. First operand has 268 states, 188 states have (on average 1.6063829787234043) internal successors, (302), 189 states have internal predecessors, (302), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) Second operand has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:07:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:25,890 INFO L93 Difference]: Finished difference Result 529 states and 979 transitions. [2023-11-29 00:07:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:07:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) Word has length 508 [2023-11-29 00:07:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:25,905 INFO L225 Difference]: With dead ends: 529 [2023-11-29 00:07:25,906 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 00:07:25,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:07:25,916 INFO L413 NwaCegarLoop]: 438 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, 438 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 00:07:25,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 438 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:07:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 00:07:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-11-29 00:07:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 183 states have (on average 1.5683060109289617) internal successors, (287), 183 states have internal predecessors, (287), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:07:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 441 transitions. [2023-11-29 00:07:25,997 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 441 transitions. Word has length 508 [2023-11-29 00:07:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:25,998 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 441 transitions. [2023-11-29 00:07:25,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:07:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 441 transitions. [2023-11-29 00:07:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:26,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:26,016 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:26,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:07:26,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:26,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:26,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1522665041, now seen corresponding path program 1 times [2023-11-29 00:07:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701452528] [2023-11-29 00:07:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:26,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:26,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384947485] [2023-11-29 00:07:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:26,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:26,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:26,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:07:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:26,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:07:26,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:07:26,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:26,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701452528] [2023-11-29 00:07:26,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384947485] [2023-11-29 00:07:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384947485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:26,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:07:26,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:07:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285401982] [2023-11-29 00:07:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:07:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:07:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:07:26,873 INFO L87 Difference]: Start difference. First operand 262 states and 441 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:27,021 INFO L93 Difference]: Finished difference Result 782 states and 1317 transitions. [2023-11-29 00:07:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:07:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 508 [2023-11-29 00:07:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:27,030 INFO L225 Difference]: With dead ends: 782 [2023-11-29 00:07:27,030 INFO L226 Difference]: Without dead ends: 521 [2023-11-29 00:07:27,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 00:07:27,033 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 426 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:27,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1036 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:07:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-29 00:07:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 320. [2023-11-29 00:07:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 241 states have (on average 1.6141078838174274) internal successors, (389), 241 states have internal predecessors, (389), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:07:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 543 transitions. [2023-11-29 00:07:27,085 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 543 transitions. Word has length 508 [2023-11-29 00:07:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:27,088 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 543 transitions. [2023-11-29 00:07:27,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 543 transitions. [2023-11-29 00:07:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:27,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:27,101 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:27,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:07:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:27,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:27,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -790697615, now seen corresponding path program 1 times [2023-11-29 00:07:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767212856] [2023-11-29 00:07:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:27,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836034442] [2023-11-29 00:07:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:27,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:27,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:27,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:07:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:27,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:07:27,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:07:27,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:27,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767212856] [2023-11-29 00:07:27,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836034442] [2023-11-29 00:07:27,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836034442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:27,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:07:27,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:07:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027798693] [2023-11-29 00:07:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:27,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:07:27,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:07:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:07:27,975 INFO L87 Difference]: Start difference. First operand 320 states and 543 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:28,093 INFO L93 Difference]: Finished difference Result 957 states and 1625 transitions. [2023-11-29 00:07:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:07:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 508 [2023-11-29 00:07:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:28,102 INFO L225 Difference]: With dead ends: 957 [2023-11-29 00:07:28,102 INFO L226 Difference]: Without dead ends: 638 [2023-11-29 00:07:28,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 00:07:28,104 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 376 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:28,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1060 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:07:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-11-29 00:07:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2023-11-29 00:07:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 479 states have (on average 1.605427974947808) internal successors, (769), 479 states have internal predecessors, (769), 154 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:07:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1077 transitions. [2023-11-29 00:07:28,163 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1077 transitions. Word has length 508 [2023-11-29 00:07:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:28,165 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1077 transitions. [2023-11-29 00:07:28,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1077 transitions. [2023-11-29 00:07:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:28,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:28,170 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:28,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:07:28,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:28,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:28,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -367995789, now seen corresponding path program 1 times [2023-11-29 00:07:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:28,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900900397] [2023-11-29 00:07:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:28,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:28,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076329128] [2023-11-29 00:07:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:28,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:28,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:28,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:07:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:28,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:07:28,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3378 proven. 189 refuted. 0 times theorem prover too weak. 8137 trivial. 0 not checked. [2023-11-29 00:07:30,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 39 proven. 189 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:31,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900900397] [2023-11-29 00:07:31,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076329128] [2023-11-29 00:07:31,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076329128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:31,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 00:07:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552205015] [2023-11-29 00:07:31,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:07:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:07:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:07:31,154 INFO L87 Difference]: Start difference. First operand 636 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 13.928571428571429) internal successors, (195), 14 states have internal predecessors, (195), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:07:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:33,096 INFO L93 Difference]: Finished difference Result 2307 states and 3914 transitions. [2023-11-29 00:07:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:07:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.928571428571429) internal successors, (195), 14 states have internal predecessors, (195), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 508 [2023-11-29 00:07:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:33,109 INFO L225 Difference]: With dead ends: 2307 [2023-11-29 00:07:33,110 INFO L226 Difference]: Without dead ends: 1672 [2023-11-29 00:07:33,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:07:33,113 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 1716 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:33,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1792 Valid, 3400 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:07:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-11-29 00:07:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1286. [2023-11-29 00:07:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 971 states have (on average 1.5983522142121525) internal successors, (1552), 971 states have internal predecessors, (1552), 308 states have call successors, (308), 6 states have call predecessors, (308), 6 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-29 00:07:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 2168 transitions. [2023-11-29 00:07:33,323 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 2168 transitions. Word has length 508 [2023-11-29 00:07:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:33,324 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 2168 transitions. [2023-11-29 00:07:33,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.928571428571429) internal successors, (195), 14 states have internal predecessors, (195), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:07:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 2168 transitions. [2023-11-29 00:07:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:33,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:33,330 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:33,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:07:33,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:33,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:33,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1584149515, now seen corresponding path program 1 times [2023-11-29 00:07:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:33,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783348734] [2023-11-29 00:07:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:33,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:33,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:33,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033010527] [2023-11-29 00:07:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:33,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:33,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:33,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:07:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:33,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:07:33,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2848 proven. 30 refuted. 0 times theorem prover too weak. 8826 trivial. 0 not checked. [2023-11-29 00:07:34,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 198 proven. 30 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783348734] [2023-11-29 00:07:34,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033010527] [2023-11-29 00:07:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033010527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:34,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:07:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539345075] [2023-11-29 00:07:34,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:07:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:07:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:07:34,369 INFO L87 Difference]: Start difference. First operand 1286 states and 2168 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 00:07:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:34,966 INFO L93 Difference]: Finished difference Result 2471 states and 4154 transitions. [2023-11-29 00:07:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:07:34,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 508 [2023-11-29 00:07:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:34,978 INFO L225 Difference]: With dead ends: 2471 [2023-11-29 00:07:34,978 INFO L226 Difference]: Without dead ends: 1318 [2023-11-29 00:07:34,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1008 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 00:07:34,983 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 841 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:34,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 883 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2023-11-29 00:07:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1302. [2023-11-29 00:07:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 983 states have (on average 1.5584944048830112) internal successors, (1532), 983 states have internal predecessors, (1532), 308 states have call successors, (308), 10 states have call predecessors, (308), 10 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-29 00:07:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2148 transitions. [2023-11-29 00:07:35,218 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2148 transitions. Word has length 508 [2023-11-29 00:07:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:35,220 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2148 transitions. [2023-11-29 00:07:35,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 00:07:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2148 transitions. [2023-11-29 00:07:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:35,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:35,228 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:35,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:07:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:35,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:35,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1290784711, now seen corresponding path program 1 times [2023-11-29 00:07:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494994565] [2023-11-29 00:07:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:35,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248096901] [2023-11-29 00:07:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:35,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:07:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:35,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:07:35,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:07:35,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494994565] [2023-11-29 00:07:35,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248096901] [2023-11-29 00:07:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248096901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:35,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:07:35,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:07:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423569301] [2023-11-29 00:07:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:35,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:07:35,872 INFO L87 Difference]: Start difference. First operand 1302 states and 2148 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:36,369 INFO L93 Difference]: Finished difference Result 3652 states and 6023 transitions. [2023-11-29 00:07:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:07:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 508 [2023-11-29 00:07:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:36,388 INFO L225 Difference]: With dead ends: 3652 [2023-11-29 00:07:36,388 INFO L226 Difference]: Without dead ends: 2487 [2023-11-29 00:07:36,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 506 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 00:07:36,392 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 736 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:36,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1049 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:07:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2023-11-29 00:07:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1822. [2023-11-29 00:07:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1499 states have (on average 1.620413609072715) internal successors, (2429), 1499 states have internal predecessors, (2429), 308 states have call successors, (308), 14 states have call predecessors, (308), 14 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-29 00:07:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3045 transitions. [2023-11-29 00:07:36,635 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3045 transitions. Word has length 508 [2023-11-29 00:07:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:36,636 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 3045 transitions. [2023-11-29 00:07:36,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3045 transitions. [2023-11-29 00:07:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-29 00:07:36,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:36,642 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:36,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:07:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:07:36,843 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:36,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash -29867461, now seen corresponding path program 1 times [2023-11-29 00:07:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:36,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922212553] [2023-11-29 00:07:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:36,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116788688] [2023-11-29 00:07:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:36,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:36,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:36,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:07:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:37,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:07:37,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3276 proven. 36 refuted. 0 times theorem prover too weak. 8392 trivial. 0 not checked. [2023-11-29 00:07:37,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 192 proven. 36 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:37,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922212553] [2023-11-29 00:07:37,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116788688] [2023-11-29 00:07:37,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116788688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:37,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:37,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 00:07:37,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110927549] [2023-11-29 00:07:37,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:07:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:07:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:07:37,668 INFO L87 Difference]: Start difference. First operand 1822 states and 3045 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 00:07:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:38,319 INFO L93 Difference]: Finished difference Result 3055 states and 5028 transitions. [2023-11-29 00:07:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:07:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 508 [2023-11-29 00:07:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:38,331 INFO L225 Difference]: With dead ends: 3055 [2023-11-29 00:07:38,331 INFO L226 Difference]: Without dead ends: 1374 [2023-11-29 00:07:38,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1007 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:07:38,336 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1030 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:38,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 873 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2023-11-29 00:07:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1334. [2023-11-29 00:07:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1007 states have (on average 1.5243296921549156) internal successors, (1535), 1007 states have internal predecessors, (1535), 308 states have call successors, (308), 18 states have call predecessors, (308), 18 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-29 00:07:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 2151 transitions. [2023-11-29 00:07:38,542 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 2151 transitions. Word has length 508 [2023-11-29 00:07:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:38,543 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 2151 transitions. [2023-11-29 00:07:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 00:07:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 2151 transitions. [2023-11-29 00:07:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-29 00:07:38,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:38,548 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:38,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:07:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:38,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:38,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 673513789, now seen corresponding path program 1 times [2023-11-29 00:07:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872928867] [2023-11-29 00:07:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:38,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:38,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540104836] [2023-11-29 00:07:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:38,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:38,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:38,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:38,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:07:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:39,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:07:39,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2388 proven. 24 refuted. 0 times theorem prover too weak. 9292 trivial. 0 not checked. [2023-11-29 00:07:39,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 204 proven. 24 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:39,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872928867] [2023-11-29 00:07:39,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540104836] [2023-11-29 00:07:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540104836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:39,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:07:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471647734] [2023-11-29 00:07:39,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:39,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:07:39,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:07:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:07:39,482 INFO L87 Difference]: Start difference. First operand 1334 states and 2151 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-29 00:07:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:39,996 INFO L93 Difference]: Finished difference Result 2555 states and 4099 transitions. [2023-11-29 00:07:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:07:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 509 [2023-11-29 00:07:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:40,006 INFO L225 Difference]: With dead ends: 2555 [2023-11-29 00:07:40,006 INFO L226 Difference]: Without dead ends: 1366 [2023-11-29 00:07:40,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 1010 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 00:07:40,010 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 803 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:40,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 864 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:07:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-29 00:07:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1266. [2023-11-29 00:07:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 935 states have (on average 1.4663101604278075) internal successors, (1371), 935 states have internal predecessors, (1371), 308 states have call successors, (308), 22 states have call predecessors, (308), 22 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-29 00:07:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1987 transitions. [2023-11-29 00:07:40,136 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1987 transitions. Word has length 509 [2023-11-29 00:07:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:40,137 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1987 transitions. [2023-11-29 00:07:40,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-29 00:07:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1987 transitions. [2023-11-29 00:07:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-29 00:07:40,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:40,142 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:40,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:07:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:40,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:40,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1107242875, now seen corresponding path program 1 times [2023-11-29 00:07:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:40,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355236760] [2023-11-29 00:07:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:40,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:40,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933971631] [2023-11-29 00:07:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:40,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:40,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:07:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:40,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:07:40,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5545 proven. 348 refuted. 0 times theorem prover too weak. 5811 trivial. 0 not checked. [2023-11-29 00:07:41,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 102 proven. 351 refuted. 0 times theorem prover too weak. 11251 trivial. 0 not checked. [2023-11-29 00:07:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355236760] [2023-11-29 00:07:42,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933971631] [2023-11-29 00:07:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933971631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:42,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:42,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 00:07:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558110331] [2023-11-29 00:07:42,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:07:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:42,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:07:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:42,411 INFO L87 Difference]: Start difference. First operand 1266 states and 1987 transitions. Second operand has 16 states, 16 states have (on average 13.125) internal successors, (210), 16 states have internal predecessors, (210), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-29 00:07:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:44,040 INFO L93 Difference]: Finished difference Result 3605 states and 5639 transitions. [2023-11-29 00:07:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:07:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.125) internal successors, (210), 16 states have internal predecessors, (210), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) Word has length 509 [2023-11-29 00:07:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:44,054 INFO L225 Difference]: With dead ends: 3605 [2023-11-29 00:07:44,054 INFO L226 Difference]: Without dead ends: 2488 [2023-11-29 00:07:44,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1006 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:07:44,059 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1794 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:44,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 1465 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:07:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2023-11-29 00:07:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2406. [2023-11-29 00:07:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1912 states have (on average 1.5135983263598327) internal successors, (2894), 1918 states have internal predecessors, (2894), 446 states have call successors, (446), 47 states have call predecessors, (446), 47 states have return successors, (446), 440 states have call predecessors, (446), 446 states have call successors, (446) [2023-11-29 00:07:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3786 transitions. [2023-11-29 00:07:44,371 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3786 transitions. Word has length 509 [2023-11-29 00:07:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:44,372 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3786 transitions. [2023-11-29 00:07:44,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.125) internal successors, (210), 16 states have internal predecessors, (210), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-29 00:07:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3786 transitions. [2023-11-29 00:07:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-29 00:07:44,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:44,378 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:44,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:07:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:44,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:44,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash 626162617, now seen corresponding path program 1 times [2023-11-29 00:07:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344543383] [2023-11-29 00:07:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:44,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322167983] [2023-11-29 00:07:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:44,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:44,648 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:07:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:45,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:45,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5922 proven. 117 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2023-11-29 00:07:45,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 111 proven. 117 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:45,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344543383] [2023-11-29 00:07:45,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322167983] [2023-11-29 00:07:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322167983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:45,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:45,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 00:07:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780440146] [2023-11-29 00:07:45,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:07:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:07:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:07:45,580 INFO L87 Difference]: Start difference. First operand 2406 states and 3786 transitions. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-29 00:07:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:46,375 INFO L93 Difference]: Finished difference Result 4255 states and 6744 transitions. [2023-11-29 00:07:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:07:46,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 509 [2023-11-29 00:07:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:46,388 INFO L225 Difference]: With dead ends: 4255 [2023-11-29 00:07:46,388 INFO L226 Difference]: Without dead ends: 2006 [2023-11-29 00:07:46,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 1009 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:07:46,392 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 797 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 1088 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:07:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2023-11-29 00:07:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1965. [2023-11-29 00:07:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1650 states have (on average 1.5454545454545454) internal successors, (2550), 1655 states have internal predecessors, (2550), 283 states have call successors, (283), 31 states have call predecessors, (283), 31 states have return successors, (283), 278 states have call predecessors, (283), 283 states have call successors, (283) [2023-11-29 00:07:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3116 transitions. [2023-11-29 00:07:46,512 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3116 transitions. Word has length 509 [2023-11-29 00:07:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:46,512 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 3116 transitions. [2023-11-29 00:07:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-29 00:07:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3116 transitions. [2023-11-29 00:07:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-29 00:07:46,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:46,518 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:46,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:07:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:46,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2102866245, now seen corresponding path program 1 times [2023-11-29 00:07:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985850731] [2023-11-29 00:07:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:46,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:46,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002647324] [2023-11-29 00:07:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:46,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:46,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:07:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:47,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:07:47,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:07:47,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:47,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985850731] [2023-11-29 00:07:47,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002647324] [2023-11-29 00:07:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002647324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:47,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:07:47,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:07:47,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941904187] [2023-11-29 00:07:47,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:47,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:07:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:07:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:07:47,321 INFO L87 Difference]: Start difference. First operand 1965 states and 3116 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:48,076 INFO L93 Difference]: Finished difference Result 3901 states and 6150 transitions. [2023-11-29 00:07:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:07:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 509 [2023-11-29 00:07:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:48,094 INFO L225 Difference]: With dead ends: 3901 [2023-11-29 00:07:48,094 INFO L226 Difference]: Without dead ends: 2481 [2023-11-29 00:07:48,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:07:48,098 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 2055 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:48,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 1233 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2023-11-29 00:07:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 980. [2023-11-29 00:07:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 755 states have (on average 1.4887417218543046) internal successors, (1124), 757 states have internal predecessors, (1124), 200 states have call successors, (200), 24 states have call predecessors, (200), 24 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2023-11-29 00:07:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1524 transitions. [2023-11-29 00:07:48,280 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1524 transitions. Word has length 509 [2023-11-29 00:07:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:48,281 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1524 transitions. [2023-11-29 00:07:48,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:07:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1524 transitions. [2023-11-29 00:07:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-29 00:07:48,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:48,285 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:48,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:07:48,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:48,486 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:48,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1468663002, now seen corresponding path program 1 times [2023-11-29 00:07:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607306260] [2023-11-29 00:07:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:48,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668669327] [2023-11-29 00:07:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:48,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:48,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:07:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:48,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:07:48,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5922 proven. 117 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2023-11-29 00:07:49,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:07:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607306260] [2023-11-29 00:07:50,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668669327] [2023-11-29 00:07:50,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668669327] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:50,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:07:50,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-29 00:07:50,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558318223] [2023-11-29 00:07:50,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:07:50,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:07:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:07:50,224 INFO L87 Difference]: Start difference. First operand 980 states and 1524 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:07:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:50,861 INFO L93 Difference]: Finished difference Result 2485 states and 3915 transitions. [2023-11-29 00:07:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:07:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 510 [2023-11-29 00:07:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:50,870 INFO L225 Difference]: With dead ends: 2485 [2023-11-29 00:07:50,870 INFO L226 Difference]: Without dead ends: 1676 [2023-11-29 00:07:50,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1007 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:50,872 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1221 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:50,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 2618 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2023-11-29 00:07:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1218. [2023-11-29 00:07:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 906 states have (on average 1.4613686534216335) internal successors, (1324), 908 states have internal predecessors, (1324), 277 states have call successors, (277), 34 states have call predecessors, (277), 34 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2023-11-29 00:07:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1878 transitions. [2023-11-29 00:07:51,002 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1878 transitions. Word has length 510 [2023-11-29 00:07:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:51,002 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 1878 transitions. [2023-11-29 00:07:51,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:07:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1878 transitions. [2023-11-29 00:07:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-29 00:07:51,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:51,007 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:51,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:07:51,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:07:51,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:51,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2123351821, now seen corresponding path program 1 times [2023-11-29 00:07:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:51,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677123136] [2023-11-29 00:07:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:51,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141357316] [2023-11-29 00:07:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:51,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:07:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:51,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:07:51,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5449 proven. 147 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2023-11-29 00:07:53,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677123136] [2023-11-29 00:07:54,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141357316] [2023-11-29 00:07:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141357316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:54,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 00:07:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713913431] [2023-11-29 00:07:54,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:07:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:07:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:54,072 INFO L87 Difference]: Start difference. First operand 1218 states and 1878 transitions. Second operand has 16 states, 15 states have (on average 15.6) internal successors, (234), 16 states have internal predecessors, (234), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) [2023-11-29 00:07:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:54,958 INFO L93 Difference]: Finished difference Result 2243 states and 3448 transitions. [2023-11-29 00:07:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:07:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 15.6) internal successors, (234), 16 states have internal predecessors, (234), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) Word has length 512 [2023-11-29 00:07:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:54,966 INFO L225 Difference]: With dead ends: 2243 [2023-11-29 00:07:54,966 INFO L226 Difference]: Without dead ends: 1272 [2023-11-29 00:07:54,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:07:54,969 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1439 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:54,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 792 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:07:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2023-11-29 00:07:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1230. [2023-11-29 00:07:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 915 states have (on average 1.4306010928961748) internal successors, (1309), 917 states have internal predecessors, (1309), 277 states have call successors, (277), 37 states have call predecessors, (277), 37 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2023-11-29 00:07:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1863 transitions. [2023-11-29 00:07:55,106 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1863 transitions. Word has length 512 [2023-11-29 00:07:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:55,107 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1863 transitions. [2023-11-29 00:07:55,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 15.6) internal successors, (234), 16 states have internal predecessors, (234), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) [2023-11-29 00:07:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1863 transitions. [2023-11-29 00:07:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-29 00:07:55,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:55,111 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:55,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:07:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:07:55,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:55,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash 719259636, now seen corresponding path program 1 times [2023-11-29 00:07:55,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:55,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543533651] [2023-11-29 00:07:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:55,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:07:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944262811] [2023-11-29 00:07:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:55,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:55,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:55,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:55,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:07:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:55,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:55,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3378 proven. 189 refuted. 0 times theorem prover too weak. 8137 trivial. 0 not checked. [2023-11-29 00:07:56,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 39 proven. 189 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:07:57,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:57,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543533651] [2023-11-29 00:07:57,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:07:57,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944262811] [2023-11-29 00:07:57,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944262811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:57,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:57,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 00:07:57,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070837814] [2023-11-29 00:07:57,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:07:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:07:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:07:57,899 INFO L87 Difference]: Start difference. First operand 1230 states and 1863 transitions. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:08:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:00,243 INFO L93 Difference]: Finished difference Result 3610 states and 5527 transitions. [2023-11-29 00:08:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:08:00,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 513 [2023-11-29 00:08:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:00,256 INFO L225 Difference]: With dead ends: 3610 [2023-11-29 00:08:00,256 INFO L226 Difference]: Without dead ends: 2679 [2023-11-29 00:08:00,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 1015 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:08:00,259 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 1688 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:00,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1764 Valid, 2690 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:08:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2023-11-29 00:08:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2221. [2023-11-29 00:08:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 1756 states have (on average 1.4766514806378133) internal successors, (2593), 1762 states have internal predecessors, (2593), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-29 00:08:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 3405 transitions. [2023-11-29 00:08:00,534 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 3405 transitions. Word has length 513 [2023-11-29 00:08:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:00,535 INFO L495 AbstractCegarLoop]: Abstraction has 2221 states and 3405 transitions. [2023-11-29 00:08:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:08:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 3405 transitions. [2023-11-29 00:08:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-29 00:08:00,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:00,538 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:00,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:08:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:08:00,739 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:00,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1309326474, now seen corresponding path program 1 times [2023-11-29 00:08:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245416899] [2023-11-29 00:08:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:00,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:08:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209616676] [2023-11-29 00:08:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:00,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:00,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:08:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:01,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:08:01,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:08:02,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:08:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245416899] [2023-11-29 00:08:02,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209616676] [2023-11-29 00:08:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209616676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:02,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:02,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:08:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834942615] [2023-11-29 00:08:02,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:02,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:08:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:08:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:08:02,213 INFO L87 Difference]: Start difference. First operand 2221 states and 3405 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:08:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:02,999 INFO L93 Difference]: Finished difference Result 3633 states and 5556 transitions. [2023-11-29 00:08:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:08:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 513 [2023-11-29 00:08:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:03,012 INFO L225 Difference]: With dead ends: 3633 [2023-11-29 00:08:03,012 INFO L226 Difference]: Without dead ends: 2203 [2023-11-29 00:08:03,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 509 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 00:08:03,015 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 656 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1439 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:08:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2023-11-29 00:08:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2086. [2023-11-29 00:08:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 1621 states have (on average 1.458975940777298) internal successors, (2365), 1627 states have internal predecessors, (2365), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-29 00:08:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 3177 transitions. [2023-11-29 00:08:03,234 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 3177 transitions. Word has length 513 [2023-11-29 00:08:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:03,235 INFO L495 AbstractCegarLoop]: Abstraction has 2086 states and 3177 transitions. [2023-11-29 00:08:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:08:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 3177 transitions. [2023-11-29 00:08:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:08:03,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:03,237 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:03,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:08:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:08:03,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:03,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1438714394, now seen corresponding path program 1 times [2023-11-29 00:08:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542393682] [2023-11-29 00:08:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:03,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:08:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367727715] [2023-11-29 00:08:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:03,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:03,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:08:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:03,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:08:03,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:08:04,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:08:04,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542393682] [2023-11-29 00:08:04,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:04,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367727715] [2023-11-29 00:08:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367727715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:04,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:08:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73100456] [2023-11-29 00:08:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:08:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:08:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:08:04,402 INFO L87 Difference]: Start difference. First operand 2086 states and 3177 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:08:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:04,629 INFO L93 Difference]: Finished difference Result 3986 states and 6092 transitions. [2023-11-29 00:08:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:08:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 514 [2023-11-29 00:08:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:04,638 INFO L225 Difference]: With dead ends: 3986 [2023-11-29 00:08:04,638 INFO L226 Difference]: Without dead ends: 2086 [2023-11-29 00:08:04,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 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 00:08:04,643 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 159 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:04,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 412 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:08:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-11-29 00:08:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2086. [2023-11-29 00:08:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 1621 states have (on average 1.4509561998766194) internal successors, (2352), 1627 states have internal predecessors, (2352), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-29 00:08:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 3164 transitions. [2023-11-29 00:08:04,908 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 3164 transitions. Word has length 514 [2023-11-29 00:08:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:04,909 INFO L495 AbstractCegarLoop]: Abstraction has 2086 states and 3164 transitions. [2023-11-29 00:08:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:08:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 3164 transitions. [2023-11-29 00:08:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:08:04,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:04,913 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:04,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 00:08:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:08:05,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:05,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 929241304, now seen corresponding path program 1 times [2023-11-29 00:08:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440844691] [2023-11-29 00:08:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:05,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:08:05,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035746217] [2023-11-29 00:08:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:05,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:05,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:05,171 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:05,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:08:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:05,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:08:05,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2837 proven. 393 refuted. 0 times theorem prover too weak. 8474 trivial. 0 not checked. [2023-11-29 00:08:07,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:07,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:07,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440844691] [2023-11-29 00:08:07,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:07,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035746217] [2023-11-29 00:08:07,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035746217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:07,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:08:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 00:08:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70770861] [2023-11-29 00:08:07,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:08:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:08:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:08:07,561 INFO L87 Difference]: Start difference. First operand 2086 states and 3164 transitions. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 00:08:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:10,296 INFO L93 Difference]: Finished difference Result 5543 states and 8382 transitions. [2023-11-29 00:08:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:08:10,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 514 [2023-11-29 00:08:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:10,305 INFO L225 Difference]: With dead ends: 5543 [2023-11-29 00:08:10,306 INFO L226 Difference]: Without dead ends: 3643 [2023-11-29 00:08:10,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:08:10,310 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1084 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:10,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 1897 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:08:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2023-11-29 00:08:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 3554. [2023-11-29 00:08:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2952 states have (on average 1.477981029810298) internal successors, (4363), 2967 states have internal predecessors, (4363), 505 states have call successors, (505), 96 states have call predecessors, (505), 96 states have return successors, (505), 490 states have call predecessors, (505), 505 states have call successors, (505) [2023-11-29 00:08:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5373 transitions. [2023-11-29 00:08:10,759 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5373 transitions. Word has length 514 [2023-11-29 00:08:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:10,760 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5373 transitions. [2023-11-29 00:08:10,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 00:08:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5373 transitions. [2023-11-29 00:08:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:08:10,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:10,764 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:10,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:08:10,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:08:10,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:10,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:10,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1373141978, now seen corresponding path program 1 times [2023-11-29 00:08:10,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:10,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200399930] [2023-11-29 00:08:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:10,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:11,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:08:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247385831] [2023-11-29 00:08:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:11,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:11,031 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:08:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:11,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:08:11,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5422 proven. 147 refuted. 0 times theorem prover too weak. 6135 trivial. 0 not checked. [2023-11-29 00:08:11,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:08:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200399930] [2023-11-29 00:08:12,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247385831] [2023-11-29 00:08:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247385831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:12,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:12,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:08:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563160144] [2023-11-29 00:08:12,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:12,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:08:12,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:08:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:08:12,247 INFO L87 Difference]: Start difference. First operand 3554 states and 5373 transitions. Second operand has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 3 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 3 states have call predecessors, (127), 3 states have call successors, (127) [2023-11-29 00:08:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:13,756 INFO L93 Difference]: Finished difference Result 9667 states and 14662 transitions. [2023-11-29 00:08:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:08:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 3 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 3 states have call predecessors, (127), 3 states have call successors, (127) Word has length 514 [2023-11-29 00:08:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:13,773 INFO L225 Difference]: With dead ends: 9667 [2023-11-29 00:08:13,773 INFO L226 Difference]: Without dead ends: 6309 [2023-11-29 00:08:13,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1016 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:08:13,780 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1071 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:13,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1618 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:08:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6309 states. [2023-11-29 00:08:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6309 to 6184. [2023-11-29 00:08:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 5241 states have (on average 1.4964701392863957) internal successors, (7843), 5274 states have internal predecessors, (7843), 783 states have call successors, (783), 159 states have call predecessors, (783), 159 states have return successors, (783), 750 states have call predecessors, (783), 783 states have call successors, (783) [2023-11-29 00:08:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 9409 transitions. [2023-11-29 00:08:14,363 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 9409 transitions. Word has length 514 [2023-11-29 00:08:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:14,364 INFO L495 AbstractCegarLoop]: Abstraction has 6184 states and 9409 transitions. [2023-11-29 00:08:14,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 3 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 3 states have call predecessors, (127), 3 states have call successors, (127) [2023-11-29 00:08:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 9409 transitions. [2023-11-29 00:08:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:08:14,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:14,369 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:14,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:08:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:08:14,569 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:14,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 529136476, now seen corresponding path program 1 times [2023-11-29 00:08:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206181036] [2023-11-29 00:08:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:14,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:08:14,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858446390] [2023-11-29 00:08:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:14,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:14,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:14,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:08:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:15,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:08:15,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5200 proven. 1197 refuted. 0 times theorem prover too weak. 5307 trivial. 0 not checked. [2023-11-29 00:08:24,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 228 proven. 666 refuted. 0 times theorem prover too weak. 10810 trivial. 0 not checked. [2023-11-29 00:08:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206181036] [2023-11-29 00:08:40,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858446390] [2023-11-29 00:08:40,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858446390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:40,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2023-11-29 00:08:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53998137] [2023-11-29 00:08:40,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:08:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:40,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:08:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1902, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:08:40,832 INFO L87 Difference]: Start difference. First operand 6184 states and 9409 transitions. Second operand has 50 states, 48 states have (on average 5.75) internal successors, (276), 46 states have internal predecessors, (276), 14 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 14 states have call successors, (154) [2023-11-29 00:09:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:09:29,916 INFO L93 Difference]: Finished difference Result 87812 states and 137031 transitions. [2023-11-29 00:09:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2023-11-29 00:09:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 5.75) internal successors, (276), 46 states have internal predecessors, (276), 14 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 14 states have call successors, (154) Word has length 514 [2023-11-29 00:09:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:09:30,081 INFO L225 Difference]: With dead ends: 87812 [2023-11-29 00:09:30,081 INFO L226 Difference]: Without dead ends: 81828 [2023-11-29 00:09:30,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26810 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=13627, Invalid=45179, Unknown=0, NotChecked=0, Total=58806 [2023-11-29 00:09:30,113 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 9474 mSDsluCounter, 7714 mSDsCounter, 0 mSdLazyCounter, 10718 mSolverCounterSat, 3487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9483 SdHoareTripleChecker+Valid, 8148 SdHoareTripleChecker+Invalid, 14205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3487 IncrementalHoareTripleChecker+Valid, 10718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:09:30,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9483 Valid, 8148 Invalid, 14205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3487 Valid, 10718 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-11-29 00:09:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81828 states. [2023-11-29 00:09:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81828 to 21546. [2023-11-29 00:09:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21546 states, 19316 states have (on average 1.5212259266928971) internal successors, (29384), 19382 states have internal predecessors, (29384), 1760 states have call successors, (1760), 469 states have call predecessors, (1760), 469 states have return successors, (1760), 1694 states have call predecessors, (1760), 1760 states have call successors, (1760) [2023-11-29 00:09:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 32904 transitions. [2023-11-29 00:09:32,764 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 32904 transitions. Word has length 514 [2023-11-29 00:09:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:09:32,765 INFO L495 AbstractCegarLoop]: Abstraction has 21546 states and 32904 transitions. [2023-11-29 00:09:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 5.75) internal successors, (276), 46 states have internal predecessors, (276), 14 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 14 states have call successors, (154) [2023-11-29 00:09:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 32904 transitions. [2023-11-29 00:09:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:09:32,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:09:32,770 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:32,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:09:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:32,970 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:09:32,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash -993552616, now seen corresponding path program 1 times [2023-11-29 00:09:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:32,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640407730] [2023-11-29 00:09:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:33,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:09:33,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346294047] [2023-11-29 00:09:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:33,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:33,026 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:33,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:09:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:33,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:09:33,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5422 proven. 147 refuted. 0 times theorem prover too weak. 6135 trivial. 0 not checked. [2023-11-29 00:09:34,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:09:34,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:34,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640407730] [2023-11-29 00:09:34,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:09:34,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346294047] [2023-11-29 00:09:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346294047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:34,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:09:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 00:09:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545638221] [2023-11-29 00:09:34,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:09:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:09:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:09:34,709 INFO L87 Difference]: Start difference. First operand 21546 states and 32904 transitions. Second operand has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:09:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:09:43,356 INFO L93 Difference]: Finished difference Result 81644 states and 124992 transitions. [2023-11-29 00:09:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:09:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 514 [2023-11-29 00:09:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:09:43,480 INFO L225 Difference]: With dead ends: 81644 [2023-11-29 00:09:43,480 INFO L226 Difference]: Without dead ends: 60330 [2023-11-29 00:09:43,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:09:43,511 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 1145 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:09:43,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 3296 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:09:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60330 states. [2023-11-29 00:09:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60330 to 31464. [2023-11-29 00:09:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31464 states, 27963 states have (on average 1.5092801201587813) internal successors, (42204), 28055 states have internal predecessors, (42204), 2788 states have call successors, (2788), 712 states have call predecessors, (2788), 712 states have return successors, (2788), 2696 states have call predecessors, (2788), 2788 states have call successors, (2788) [2023-11-29 00:09:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31464 states to 31464 states and 47780 transitions. [2023-11-29 00:09:47,928 INFO L78 Accepts]: Start accepts. Automaton has 31464 states and 47780 transitions. Word has length 514 [2023-11-29 00:09:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:09:47,928 INFO L495 AbstractCegarLoop]: Abstraction has 31464 states and 47780 transitions. [2023-11-29 00:09:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:09:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31464 states and 47780 transitions. [2023-11-29 00:09:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:09:47,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:09:47,936 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:47,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:09:48,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:48,137 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:09:48,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -916055334, now seen corresponding path program 1 times [2023-11-29 00:09:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:48,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132086589] [2023-11-29 00:09:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:48,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:09:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901515996] [2023-11-29 00:09:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:48,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:48,194 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:48,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:09:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:48,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 00:09:48,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7747 proven. 1050 refuted. 0 times theorem prover too weak. 2907 trivial. 0 not checked. [2023-11-29 00:09:58,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 183 proven. 45 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:10:00,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:00,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132086589] [2023-11-29 00:10:00,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:10:00,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901515996] [2023-11-29 00:10:00,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901515996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:10:00,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:10:00,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 41 [2023-11-29 00:10:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028243624] [2023-11-29 00:10:00,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 00:10:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 00:10:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 00:10:00,072 INFO L87 Difference]: Start difference. First operand 31464 states and 47780 transitions. Second operand has 41 states, 41 states have (on average 6.341463414634147) internal successors, (260), 39 states have internal predecessors, (260), 11 states have call successors, (154), 10 states have call predecessors, (154), 16 states have return successors, (154), 11 states have call predecessors, (154), 11 states have call successors, (154) [2023-11-29 00:10:13,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:10:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:10:24,620 INFO L93 Difference]: Finished difference Result 114553 states and 176350 transitions. [2023-11-29 00:10:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 00:10:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.341463414634147) internal successors, (260), 39 states have internal predecessors, (260), 11 states have call successors, (154), 10 states have call predecessors, (154), 16 states have return successors, (154), 11 states have call predecessors, (154), 11 states have call successors, (154) Word has length 514 [2023-11-29 00:10:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:10:24,723 INFO L225 Difference]: With dead ends: 114553 [2023-11-29 00:10:24,723 INFO L226 Difference]: Without dead ends: 83321 [2023-11-29 00:10:24,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2125, Invalid=8587, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 00:10:24,746 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 5486 mSDsluCounter, 5997 mSDsCounter, 0 mSdLazyCounter, 5580 mSolverCounterSat, 1799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5560 SdHoareTripleChecker+Valid, 6323 SdHoareTripleChecker+Invalid, 7379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1799 IncrementalHoareTripleChecker+Valid, 5580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:10:24,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5560 Valid, 6323 Invalid, 7379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1799 Valid, 5580 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-11-29 00:10:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2023-11-29 00:10:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 37764. [2023-11-29 00:10:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37764 states, 33846 states have (on average 1.5117591443597471) internal successors, (51167), 33966 states have internal predecessors, (51167), 3114 states have call successors, (3114), 803 states have call predecessors, (3114), 803 states have return successors, (3114), 2994 states have call predecessors, (3114), 3114 states have call successors, (3114) [2023-11-29 00:10:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37764 states to 37764 states and 57395 transitions. [2023-11-29 00:10:29,892 INFO L78 Accepts]: Start accepts. Automaton has 37764 states and 57395 transitions. Word has length 514 [2023-11-29 00:10:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:10:29,892 INFO L495 AbstractCegarLoop]: Abstraction has 37764 states and 57395 transitions. [2023-11-29 00:10:29,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.341463414634147) internal successors, (260), 39 states have internal predecessors, (260), 11 states have call successors, (154), 10 states have call predecessors, (154), 16 states have return successors, (154), 11 states have call predecessors, (154), 11 states have call successors, (154) [2023-11-29 00:10:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37764 states and 57395 transitions. [2023-11-29 00:10:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-29 00:10:29,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:10:29,896 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:29,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:10:30,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:10:30,097 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:10:30,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -998295396, now seen corresponding path program 1 times [2023-11-29 00:10:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466530402] [2023-11-29 00:10:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:30,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:30,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:10:30,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938931551] [2023-11-29 00:10:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:30,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:30,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:30,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:10:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:30,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:10:30,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7922 proven. 411 refuted. 0 times theorem prover too weak. 3371 trivial. 0 not checked. [2023-11-29 00:10:33,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:37,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:37,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466530402] [2023-11-29 00:10:37,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:10:37,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938931551] [2023-11-29 00:10:37,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938931551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:10:37,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:10:37,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 00:10:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819378786] [2023-11-29 00:10:37,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:37,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:10:37,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:37,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:10:37,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:10:37,992 INFO L87 Difference]: Start difference. First operand 37764 states and 57395 transitions. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 14 states have internal predecessors, (151), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-29 00:10:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:10:44,481 INFO L93 Difference]: Finished difference Result 76274 states and 115674 transitions. [2023-11-29 00:10:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:10:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 14 states have internal predecessors, (151), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 515 [2023-11-29 00:10:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:10:44,529 INFO L225 Difference]: With dead ends: 76274 [2023-11-29 00:10:44,529 INFO L226 Difference]: Without dead ends: 39214 [2023-11-29 00:10:44,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:10:44,552 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 544 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:10:44,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 2728 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:10:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39214 states. [2023-11-29 00:10:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39214 to 38882. [2023-11-29 00:10:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38882 states, 34697 states have (on average 1.5057785975732771) internal successors, (52246), 34827 states have internal predecessors, (52246), 3304 states have call successors, (3304), 880 states have call predecessors, (3304), 880 states have return successors, (3304), 3174 states have call predecessors, (3304), 3304 states have call successors, (3304) [2023-11-29 00:10:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38882 states to 38882 states and 58854 transitions. [2023-11-29 00:10:49,727 INFO L78 Accepts]: Start accepts. Automaton has 38882 states and 58854 transitions. Word has length 515 [2023-11-29 00:10:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:10:49,728 INFO L495 AbstractCegarLoop]: Abstraction has 38882 states and 58854 transitions. [2023-11-29 00:10:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 14 states have internal predecessors, (151), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-29 00:10:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 38882 states and 58854 transitions. [2023-11-29 00:10:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-29 00:10:49,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:10:49,735 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:49,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 00:10:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:10:49,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:10:49,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1607728158, now seen corresponding path program 1 times [2023-11-29 00:10:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164580799] [2023-11-29 00:10:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:49,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:10:49,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966883430] [2023-11-29 00:10:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:49,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:49,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:49,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:49,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:10:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:50,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:10:50,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7365 proven. 237 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2023-11-29 00:10:51,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:10,291 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~var_1_20~0 65536)) (.cse11 (mod c_~var_1_62~0 4294967296))) (let ((.cse0 (< .cse11 1)) (.cse1 (mod (div .cse2 .cse11) 4294967296))) (and (or .cse0 (forall ((v_z_101 Int) (v_z_99 Int)) (or (< v_z_101 0) (< .cse1 (+ (mod (div v_z_99 v_z_101) 4294967296) 1)) (< v_z_99 0) (< 255 v_z_99) (< 255 v_z_101)))) (or .cse0 (and (forall ((v_z_113 Int)) (or (< v_z_113 0) (forall ((v_z_112 Int)) (or (< .cse1 (+ (mod (div v_z_113 v_z_112) 4294967296) 1)) (< 255 v_z_112) (< v_z_112 0))) (< 254 v_z_113))) (forall ((v_z_113 Int)) (or (< v_z_113 0) (forall ((v_z_112 Int)) (or (< .cse1 (+ (mod (div v_z_113 v_z_112) 4294967296) 1)) (forall ((v_z_105 Int)) (or (< 255 v_z_105) (< v_z_105 0) (< .cse1 (+ (mod (div v_z_105 v_z_112) 4294967296) 1)))) (< 255 v_z_112) (< v_z_112 0))) (< 65535 v_z_113))))) (forall ((v_z_70 Int) (v_z_86 Int) (v_z_88 Int)) (let ((.cse3 (+ (mod (div v_z_88 v_z_86) 4294967296) 1))) (or (< 255 v_z_86) (< v_z_70 0) (< (mod (div .cse2 v_z_70) 4294967296) .cse3) (< v_z_86 0) (< 255 v_z_88) (< 255 v_z_70) (< v_z_88 0) (< .cse1 .cse3)))) (forall ((v_z_113 Int)) (or (< v_z_113 0) (< 254 v_z_113) (forall ((v_z_112 Int) (v_z_71 Int)) (let ((.cse4 (+ (mod (div v_z_113 v_z_112) 4294967296) 1))) (or (< .cse1 .cse4) (< (mod (div .cse2 v_z_71) 4294967296) .cse4) (< 255 v_z_71) (< 255 v_z_112) (< v_z_71 0) (< v_z_112 0)))))) (forall ((v_z_92 Int) (v_z_70 Int) (v_z_81 Int) (v_z_96 Int)) (let ((.cse5 (mod (div .cse2 v_z_70) 4294967296)) (.cse6 (+ (mod (div v_z_92 v_z_96) 4294967296) 1))) (or (< v_z_70 0) (< .cse5 .cse6) (< 65535 v_z_81) (< 255 v_z_96) (< 255 v_z_92) (< v_z_96 0) (< 255 v_z_70) (< v_z_81 v_z_92) (< .cse5 (+ (mod (div v_z_81 v_z_96) 4294967296) 1)) (< .cse1 .cse6) (< v_z_92 0)))) (forall ((v_z_113 Int)) (or (< v_z_113 0) (< 65535 v_z_113) (forall ((v_z_112 Int)) (let ((.cse7 (+ (mod (div v_z_113 v_z_112) 4294967296) 1))) (or (< .cse1 .cse7) (< 255 v_z_112) (< v_z_112 0) (forall ((v_z_70 Int)) (let ((.cse8 (mod (div .cse2 v_z_70) 4294967296))) (or (< v_z_70 0) (< .cse8 .cse7) (< 255 v_z_70) (forall ((v_z_110 Int)) (let ((.cse9 (+ (mod (div v_z_110 v_z_112) 4294967296) 1))) (or (< .cse8 .cse9) (< .cse1 .cse9) (< 255 v_z_110) (< v_z_110 0)))))))))))) (forall ((v_z_113 Int)) (or (< v_z_113 0) (forall ((v_z_112 Int)) (or (< .cse1 (+ (mod (div v_z_113 v_z_112) 4294967296) 1)) (< 255 v_z_112) (forall ((v_z_70 Int) (v_z_107 Int)) (let ((.cse10 (+ (mod (div v_z_107 v_z_112) 4294967296) 1))) (or (< v_z_70 0) (< v_z_107 0) (< (mod (div .cse2 v_z_70) 4294967296) .cse10) (< 255 v_z_70) (< v_z_113 v_z_107) (< 255 v_z_107) (< .cse1 .cse10)))) (< v_z_112 0))) (< 65535 v_z_113))) (forall ((v_z_115 Int) (v_z_129 Int) (v_z_119 Int)) (or (< v_z_119 0) (< 254 v_z_115) (< 255 v_z_119) (< (mod (div .cse2 v_z_129) 4294967296) (+ (mod (div v_z_115 v_z_119) 4294967296) 1)) (< 255 v_z_129) (< v_z_129 .cse11) (< v_z_115 0))) (forall ((v_z_113 Int)) (or (< v_z_113 0) (< 65535 v_z_113) (forall ((v_z_112 Int)) (let ((.cse12 (+ (mod (div v_z_113 v_z_112) 4294967296) 1))) (or (< .cse1 .cse12) (< 255 v_z_112) (< v_z_112 0) (forall ((v_z_70 Int)) (let ((.cse13 (mod (div .cse2 v_z_70) 4294967296))) (or (< v_z_70 0) (forall ((v_z_110 Int)) (or (< v_z_110 (+ v_z_113 1)) (< .cse13 (+ (mod (div v_z_110 v_z_112) 4294967296) 1)) (< 255 v_z_110))) (< .cse13 .cse12) (< 255 v_z_70))))))))) (forall ((v_z_132 Int) (v_z_123 Int) (v_z_127 Int)) (or (< 255 v_z_127) (< v_z_132 .cse11) (< 255 v_z_132) (< v_z_127 0) (< (mod (div .cse2 v_z_132) 4294967296) (+ (mod (div v_z_123 v_z_127) 4294967296) 1)) (< 255 v_z_123) (< v_z_123 0)))))) is different from false [2023-11-29 00:16:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164580799] [2023-11-29 00:16:19,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966883430] [2023-11-29 00:16:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966883430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:19,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:16:19,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-29 00:16:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360093688] [2023-11-29 00:16:19,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:19,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:16:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:16:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2023-11-29 00:16:19,011 INFO L87 Difference]: Start difference. First operand 38882 states and 58854 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 00:16:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:25,328 INFO L93 Difference]: Finished difference Result 62413 states and 94886 transitions. [2023-11-29 00:16:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:16:25,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 515 [2023-11-29 00:16:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:25,376 INFO L225 Difference]: With dead ends: 62413 [2023-11-29 00:16:25,376 INFO L226 Difference]: Without dead ends: 40048 [2023-11-29 00:16:25,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=56, Invalid=103, Unknown=1, NotChecked=22, Total=182 [2023-11-29 00:16:25,392 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 202 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:25,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 838 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:16:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40048 states. [2023-11-29 00:16:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40048 to 38296. [2023-11-29 00:16:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38296 states, 34059 states have (on average 1.4890043747614434) internal successors, (50714), 34185 states have internal predecessors, (50714), 3237 states have call successors, (3237), 999 states have call predecessors, (3237), 999 states have return successors, (3237), 3111 states have call predecessors, (3237), 3237 states have call successors, (3237) [2023-11-29 00:16:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38296 states to 38296 states and 57188 transitions. [2023-11-29 00:16:30,792 INFO L78 Accepts]: Start accepts. Automaton has 38296 states and 57188 transitions. Word has length 515 [2023-11-29 00:16:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:30,792 INFO L495 AbstractCegarLoop]: Abstraction has 38296 states and 57188 transitions. [2023-11-29 00:16:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (77), 3 states have call predecessors, (77), 5 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 00:16:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38296 states and 57188 transitions. [2023-11-29 00:16:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-29 00:16:30,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:30,799 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:30,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:16:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:16:30,999 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:30,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 191116766, now seen corresponding path program 1 times [2023-11-29 00:16:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:31,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987214012] [2023-11-29 00:16:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:31,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:31,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517980158] [2023-11-29 00:16:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:31,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:31,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:31,055 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:31,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:16:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:31,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:16:31,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7111 proven. 312 refuted. 0 times theorem prover too weak. 4281 trivial. 0 not checked. [2023-11-29 00:16:34,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987214012] [2023-11-29 00:16:39,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517980158] [2023-11-29 00:16:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517980158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:39,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:16:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-29 00:16:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876432058] [2023-11-29 00:16:39,788 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:39,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:16:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:16:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:16:39,790 INFO L87 Difference]: Start difference. First operand 38296 states and 57188 transitions. Second operand has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 11 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 6 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-29 00:16:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:47,983 INFO L93 Difference]: Finished difference Result 76124 states and 113740 transitions. [2023-11-29 00:16:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:16:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 11 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 6 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 515 [2023-11-29 00:16:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:48,028 INFO L225 Difference]: With dead ends: 76124 [2023-11-29 00:16:48,028 INFO L226 Difference]: Without dead ends: 38073 [2023-11-29 00:16:48,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:16:48,050 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 602 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:48,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 2737 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:16:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38073 states. [2023-11-29 00:16:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38073 to 37967. [2023-11-29 00:16:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37967 states, 33757 states have (on average 1.489113369079006) internal successors, (50268), 33881 states have internal predecessors, (50268), 3215 states have call successors, (3215), 994 states have call predecessors, (3215), 994 states have return successors, (3215), 3091 states have call predecessors, (3215), 3215 states have call successors, (3215) [2023-11-29 00:16:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37967 states to 37967 states and 56698 transitions. [2023-11-29 00:16:53,430 INFO L78 Accepts]: Start accepts. Automaton has 37967 states and 56698 transitions. Word has length 515 [2023-11-29 00:16:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:53,430 INFO L495 AbstractCegarLoop]: Abstraction has 37967 states and 56698 transitions. [2023-11-29 00:16:53,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 11 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 6 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-29 00:16:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 37967 states and 56698 transitions. [2023-11-29 00:16:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:16:53,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:53,434 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:53,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:16:53,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:53,635 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:53,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1006866239, now seen corresponding path program 1 times [2023-11-29 00:16:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:53,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820739517] [2023-11-29 00:16:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:53,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291264636] [2023-11-29 00:16:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:53,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:53,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:53,683 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:53,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19393d65-4e26-4a13-a2cc-7eed90404ef0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process