./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/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 e1fa75596dd4a8d087ff959d2eea13841816935af8426327d316b65266b0a5e8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:55:31,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:55:31,559 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:55:31,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:55:31,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:55:31,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:55:31,586 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:55:31,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:55:31,587 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:55:31,588 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:55:31,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:55:31,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:55:31,589 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:55:31,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:55:31,590 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:55:31,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:55:31,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:55:31,592 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:55:31,592 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:55:31,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:55:31,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:55:31,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:55:31,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:55:31,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:55:31,595 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:55:31,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:55:31,596 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:55:31,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:55:31,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:55:31,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:55:31,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:55:31,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:31,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:55:31,598 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:55:31,598 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:55:31,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:55:31,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:55:31,599 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:55:31,599 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:55:31,599 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:55:31,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:55:31,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:55:31,600 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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1fa75596dd4a8d087ff959d2eea13841816935af8426327d316b65266b0a5e8 [2023-11-28 23:55:31,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:55:31,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:55:31,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:55:31,869 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:55:31,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:55:31,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i [2023-11-28 23:55:34,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:55:34,918 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:55:34,918 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i [2023-11-28 23:55:34,934 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/data/6bdc8ed6e/8c0188bc7afc486db1fa954fa12da154/FLAGa2be500e5 [2023-11-28 23:55:34,950 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/data/6bdc8ed6e/8c0188bc7afc486db1fa954fa12da154 [2023-11-28 23:55:34,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:55:34,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:55:34,956 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:34,956 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:55:34,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:55:34,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:34" (1/1) ... [2023-11-28 23:55:34,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722403ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:34, skipping insertion in model container [2023-11-28 23:55:34,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:34" (1/1) ... [2023-11-28 23:55:35,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:55:35,189 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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i[916,929] [2023-11-28 23:55:35,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:35,440 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:55:35,453 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_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i[916,929] [2023-11-28 23:55:35,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:35,630 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:55:35,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35 WrapperNode [2023-11-28 23:55:35,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:35,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:35,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:55:35,632 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:55:35,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,775 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 697 [2023-11-28 23:55:35,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:35,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:55:35,776 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:55:35,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:55:35,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,806 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,874 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]. [2023-11-28 23:55:35,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:55:35,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:55:35,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:55:35,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:55:35,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (1/1) ... [2023-11-28 23:55:35,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:35,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:35,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:55:35,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:55:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 23:55:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 23:55:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:55:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:55:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:55:36,138 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:55:36,141 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:55:37,298 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:55:37,358 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:55:37,358 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:55:37,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:37 BoogieIcfgContainer [2023-11-28 23:55:37,359 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:55:37,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:55:37,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:55:37,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:55:37,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:55:34" (1/3) ... [2023-11-28 23:55:37,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4854fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:37, skipping insertion in model container [2023-11-28 23:55:37,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:35" (2/3) ... [2023-11-28 23:55:37,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4854fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:37, skipping insertion in model container [2023-11-28 23:55:37,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:37" (3/3) ... [2023-11-28 23:55:37,367 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-45.i [2023-11-28 23:55:37,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:55:37,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:55:37,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:55:37,439 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;@73ab0d53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:55:37,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:55:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 192 states have (on average 1.578125) internal successors, (303), 193 states have internal predecessors, (303), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-28 23:55:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-28 23:55:37,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:37,472 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:37,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:37,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash 439433998, now seen corresponding path program 1 times [2023-11-28 23:55:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:37,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491764702] [2023-11-28 23:55:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:37,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:37,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491764702] [2023-11-28 23:55:37,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 23:55:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871788168] [2023-11-28 23:55:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:37,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:37,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:37,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:55:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:38,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 23:55:38,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2023-11-28 23:55:38,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871788168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:38,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:38,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:55:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970418313] [2023-11-28 23:55:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:55:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:55:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:55:38,398 INFO L87 Difference]: Start difference. First operand has 258 states, 192 states have (on average 1.578125) internal successors, (303), 193 states have internal predecessors, (303), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:55:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:38,482 INFO L93 Difference]: Finished difference Result 513 states and 919 transitions. [2023-11-28 23:55:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:55:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 448 [2023-11-28 23:55:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:38,498 INFO L225 Difference]: With dead ends: 513 [2023-11-28 23:55:38,498 INFO L226 Difference]: Without dead ends: 256 [2023-11-28 23:55:38,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:55:38,507 INFO L413 NwaCegarLoop]: 420 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, 420 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 [2023-11-28 23:55:38,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 420 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:55:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-28 23:55:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-11-28 23:55:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 191 states have (on average 1.5549738219895288) internal successors, (297), 191 states have internal predecessors, (297), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-28 23:55:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 423 transitions. [2023-11-28 23:55:38,576 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 423 transitions. Word has length 448 [2023-11-28 23:55:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:38,577 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 423 transitions. [2023-11-28 23:55:38,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:55:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 423 transitions. [2023-11-28 23:55:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-11-28 23:55:38,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:38,588 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:38,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:38,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 23:55:38,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:38,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash -675618576, now seen corresponding path program 1 times [2023-11-28 23:55:38,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:38,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979306775] [2023-11-28 23:55:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:38,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:38,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044255335] [2023-11-28 23:55:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:38,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:38,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:38,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:38,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:55:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:39,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:55:39,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:39,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:39,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979306775] [2023-11-28 23:55:39,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044255335] [2023-11-28 23:55:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044255335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:39,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:39,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124854020] [2023-11-28 23:55:39,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:39,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:39,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:39,423 INFO L87 Difference]: Start difference. First operand 256 states and 423 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:39,887 INFO L93 Difference]: Finished difference Result 672 states and 1111 transitions. [2023-11-28 23:55:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 449 [2023-11-28 23:55:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:39,895 INFO L225 Difference]: With dead ends: 672 [2023-11-28 23:55:39,895 INFO L226 Difference]: Without dead ends: 417 [2023-11-28 23:55:39,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:39,897 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 262 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:39,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 863 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:55:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-11-28 23:55:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2023-11-28 23:55:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 330 states have (on average 1.584848484848485) internal successors, (523), 331 states have internal predecessors, (523), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 685 transitions. [2023-11-28 23:55:39,945 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 685 transitions. Word has length 449 [2023-11-28 23:55:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:39,948 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 685 transitions. [2023-11-28 23:55:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 685 transitions. [2023-11-28 23:55:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-11-28 23:55:39,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:39,959 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:39,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:55:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:40,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:40,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -702684178, now seen corresponding path program 1 times [2023-11-28 23:55:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438832909] [2023-11-28 23:55:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:40,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791111018] [2023-11-28 23:55:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:40,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:40,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:40,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:40,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:55:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:40,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:55:40,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:40,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:40,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:40,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438832909] [2023-11-28 23:55:40,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:40,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791111018] [2023-11-28 23:55:40,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791111018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:40,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:40,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:40,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763969557] [2023-11-28 23:55:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:40,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:40,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:40,739 INFO L87 Difference]: Start difference. First operand 414 states and 685 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:40,868 INFO L93 Difference]: Finished difference Result 1216 states and 2011 transitions. [2023-11-28 23:55:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 449 [2023-11-28 23:55:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:40,878 INFO L225 Difference]: With dead ends: 1216 [2023-11-28 23:55:40,879 INFO L226 Difference]: Without dead ends: 803 [2023-11-28 23:55:40,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:40,881 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 393 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:40,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1060 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:55:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-28 23:55:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 474. [2023-11-28 23:55:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 390 states have (on average 1.587179487179487) internal successors, (619), 391 states have internal predecessors, (619), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 781 transitions. [2023-11-28 23:55:40,942 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 781 transitions. Word has length 449 [2023-11-28 23:55:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:40,944 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 781 transitions. [2023-11-28 23:55:40,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 781 transitions. [2023-11-28 23:55:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:40,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:40,950 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:40,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:55:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:41,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:41,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1374780098, now seen corresponding path program 1 times [2023-11-28 23:55:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:41,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375760403] [2023-11-28 23:55:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:41,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:41,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814184186] [2023-11-28 23:55:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:41,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:41,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:41,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:55:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:41,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:55:41,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:41,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:41,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375760403] [2023-11-28 23:55:41,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814184186] [2023-11-28 23:55:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814184186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789684344] [2023-11-28 23:55:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:41,718 INFO L87 Difference]: Start difference. First operand 474 states and 781 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:41,845 INFO L93 Difference]: Finished difference Result 1276 states and 2097 transitions. [2023-11-28 23:55:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:41,854 INFO L225 Difference]: With dead ends: 1276 [2023-11-28 23:55:41,854 INFO L226 Difference]: Without dead ends: 803 [2023-11-28 23:55:41,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:41,858 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 386 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:41,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 812 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:55:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-28 23:55:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 474. [2023-11-28 23:55:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 390 states have (on average 1.5615384615384615) internal successors, (609), 391 states have internal predecessors, (609), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 771 transitions. [2023-11-28 23:55:41,923 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 771 transitions. Word has length 450 [2023-11-28 23:55:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:41,924 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 771 transitions. [2023-11-28 23:55:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 771 transitions. [2023-11-28 23:55:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:41,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:41,931 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:41,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:55:42,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:42,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:42,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1855860356, now seen corresponding path program 1 times [2023-11-28 23:55:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874498804] [2023-11-28 23:55:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:42,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:42,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675294922] [2023-11-28 23:55:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:42,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:42,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:42,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:55:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:42,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:55:42,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:42,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:42,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874498804] [2023-11-28 23:55:42,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675294922] [2023-11-28 23:55:42,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675294922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:42,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:42,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:42,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685079134] [2023-11-28 23:55:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:42,772 INFO L87 Difference]: Start difference. First operand 474 states and 771 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:42,898 INFO L93 Difference]: Finished difference Result 1416 states and 2303 transitions. [2023-11-28 23:55:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:42,906 INFO L225 Difference]: With dead ends: 1416 [2023-11-28 23:55:42,906 INFO L226 Difference]: Without dead ends: 943 [2023-11-28 23:55:42,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:42,909 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 372 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:42,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1076 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:55:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-11-28 23:55:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 710. [2023-11-28 23:55:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 626 states have (on average 1.5830670926517572) internal successors, (991), 627 states have internal predecessors, (991), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1153 transitions. [2023-11-28 23:55:42,962 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1153 transitions. Word has length 450 [2023-11-28 23:55:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:42,964 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1153 transitions. [2023-11-28 23:55:42,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1153 transitions. [2023-11-28 23:55:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:42,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:42,969 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:42,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:55:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:43,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:43,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1092878402, now seen corresponding path program 1 times [2023-11-28 23:55:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:43,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063197487] [2023-11-28 23:55:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:43,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852484772] [2023-11-28 23:55:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:43,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:43,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:43,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:55:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:43,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:55:43,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:43,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:43,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063197487] [2023-11-28 23:55:43,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852484772] [2023-11-28 23:55:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852484772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:43,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466767383] [2023-11-28 23:55:43,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:43,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:43,742 INFO L87 Difference]: Start difference. First operand 710 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:43,843 INFO L93 Difference]: Finished difference Result 2067 states and 3358 transitions. [2023-11-28 23:55:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:43,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:43,851 INFO L225 Difference]: With dead ends: 2067 [2023-11-28 23:55:43,851 INFO L226 Difference]: Without dead ends: 1358 [2023-11-28 23:55:43,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:43,853 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 312 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:43,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1047 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:55:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2023-11-28 23:55:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1136. [2023-11-28 23:55:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1052 states have (on average 1.6074144486692015) internal successors, (1691), 1053 states have internal predecessors, (1691), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1853 transitions. [2023-11-28 23:55:43,898 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1853 transitions. Word has length 450 [2023-11-28 23:55:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:43,899 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1853 transitions. [2023-11-28 23:55:43,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1853 transitions. [2023-11-28 23:55:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:43,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:43,904 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:43,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:55:44,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 23:55:44,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:44,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash -138938244, now seen corresponding path program 1 times [2023-11-28 23:55:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:44,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129621724] [2023-11-28 23:55:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:44,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:44,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117971343] [2023-11-28 23:55:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:44,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:44,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:44,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:44,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:55:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:44,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:55:44,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:44,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:44,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129621724] [2023-11-28 23:55:44,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117971343] [2023-11-28 23:55:44,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117971343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:44,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:44,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:55:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919754605] [2023-11-28 23:55:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:55:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:55:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:55:44,646 INFO L87 Difference]: Start difference. First operand 1136 states and 1853 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:44,766 INFO L93 Difference]: Finished difference Result 4016 states and 6591 transitions. [2023-11-28 23:55:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:55:44,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:44,780 INFO L225 Difference]: With dead ends: 4016 [2023-11-28 23:55:44,780 INFO L226 Difference]: Without dead ends: 2881 [2023-11-28 23:55:44,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:55:44,783 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 640 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:44,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1355 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:55:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2023-11-28 23:55:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1392. [2023-11-28 23:55:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1308 states have (on average 1.577217125382263) internal successors, (2063), 1309 states have internal predecessors, (2063), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2225 transitions. [2023-11-28 23:55:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2225 transitions. Word has length 450 [2023-11-28 23:55:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:44,838 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 2225 transitions. [2023-11-28 23:55:44,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2225 transitions. [2023-11-28 23:55:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:44,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:44,843 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:44,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:55:45,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:45,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:45,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1284604985, now seen corresponding path program 1 times [2023-11-28 23:55:45,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:45,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078396149] [2023-11-28 23:55:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:45,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:45,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800599653] [2023-11-28 23:55:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:45,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:45,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:45,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:45,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:55:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:45,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:55:45,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:45,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:45,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:45,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078396149] [2023-11-28 23:55:45,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:45,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800599653] [2023-11-28 23:55:45,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800599653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:45,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:45,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:55:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398137592] [2023-11-28 23:55:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:45,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:55:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:55:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:55:45,549 INFO L87 Difference]: Start difference. First operand 1392 states and 2225 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:46,364 INFO L93 Difference]: Finished difference Result 2668 states and 4251 transitions. [2023-11-28 23:55:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:55:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:46,374 INFO L225 Difference]: With dead ends: 2668 [2023-11-28 23:55:46,374 INFO L226 Difference]: Without dead ends: 1277 [2023-11-28 23:55:46,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:55:46,378 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 733 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:46,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1839 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:55:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2023-11-28 23:55:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1102. [2023-11-28 23:55:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1018 states have (on average 1.5618860510805501) internal successors, (1590), 1019 states have internal predecessors, (1590), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 23:55:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1752 transitions. [2023-11-28 23:55:46,436 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1752 transitions. Word has length 450 [2023-11-28 23:55:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:46,437 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1752 transitions. [2023-11-28 23:55:46,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1752 transitions. [2023-11-28 23:55:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:46,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:46,443 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:46,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:55:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 23:55:46,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:46,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -700850943, now seen corresponding path program 1 times [2023-11-28 23:55:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9566273] [2023-11-28 23:55:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:46,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:46,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450604859] [2023-11-28 23:55:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:46,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:46,720 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:46,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:55:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:47,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:55:47,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:47,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:47,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:47,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9566273] [2023-11-28 23:55:47,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:47,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450604859] [2023-11-28 23:55:47,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450604859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:47,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:47,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:47,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596327192] [2023-11-28 23:55:47,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:47,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:55:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:55:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:55:47,570 INFO L87 Difference]: Start difference. First operand 1102 states and 1752 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:47,916 INFO L93 Difference]: Finished difference Result 5226 states and 8310 transitions. [2023-11-28 23:55:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:55:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 450 [2023-11-28 23:55:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:47,941 INFO L225 Difference]: With dead ends: 5226 [2023-11-28 23:55:47,942 INFO L226 Difference]: Without dead ends: 4125 [2023-11-28 23:55:47,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:55:47,946 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1024 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:47,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1240 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:55:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2023-11-28 23:55:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 2207. [2023-11-28 23:55:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2040 states have (on average 1.55) internal successors, (3162), 2042 states have internal predecessors, (3162), 162 states have call successors, (162), 4 states have call predecessors, (162), 4 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-28 23:55:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3486 transitions. [2023-11-28 23:55:48,072 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3486 transitions. Word has length 450 [2023-11-28 23:55:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 3486 transitions. [2023-11-28 23:55:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3486 transitions. [2023-11-28 23:55:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-28 23:55:48,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:48,081 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:48,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:48,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:48,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1653534339, now seen corresponding path program 1 times [2023-11-28 23:55:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156251339] [2023-11-28 23:55:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:48,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743459314] [2023-11-28 23:55:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:48,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:55:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:48,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:55:48,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 546 proven. 180 refuted. 0 times theorem prover too weak. 7086 trivial. 0 not checked. [2023-11-28 23:55:49,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 6 proven. 180 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:55:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156251339] [2023-11-28 23:55:49,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743459314] [2023-11-28 23:55:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743459314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:49,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:55:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-28 23:55:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991645716] [2023-11-28 23:55:49,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:55:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:55:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:55:49,808 INFO L87 Difference]: Start difference. First operand 2207 states and 3486 transitions. Second operand has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-28 23:55:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:50,278 INFO L93 Difference]: Finished difference Result 4433 states and 6987 transitions. [2023-11-28 23:55:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:55:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) Word has length 450 [2023-11-28 23:55:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:50,295 INFO L225 Difference]: With dead ends: 4433 [2023-11-28 23:55:50,295 INFO L226 Difference]: Without dead ends: 2227 [2023-11-28 23:55:50,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-28 23:55:50,300 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 431 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:50,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 880 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:55:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2023-11-28 23:55:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 2223. [2023-11-28 23:55:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2052 states have (on average 1.5204678362573099) internal successors, (3120), 2054 states have internal predecessors, (3120), 162 states have call successors, (162), 8 states have call predecessors, (162), 8 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-28 23:55:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3444 transitions. [2023-11-28 23:55:50,432 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3444 transitions. Word has length 450 [2023-11-28 23:55:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:50,433 INFO L495 AbstractCegarLoop]: Abstraction has 2223 states and 3444 transitions. [2023-11-28 23:55:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-28 23:55:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3444 transitions. [2023-11-28 23:55:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-28 23:55:50,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:50,442 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 23:55:50,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:50,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:50,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1409258733, now seen corresponding path program 1 times [2023-11-28 23:55:50,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:50,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160773017] [2023-11-28 23:55:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:50,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228712486] [2023-11-28 23:55:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:50,712 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:50,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:55:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:51,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:55:51,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 2976 proven. 45 refuted. 0 times theorem prover too weak. 4791 trivial. 0 not checked. [2023-11-28 23:55:51,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 141 proven. 45 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:55:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160773017] [2023-11-28 23:55:51,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228712486] [2023-11-28 23:55:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228712486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:51,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:55:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-28 23:55:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267886643] [2023-11-28 23:55:51,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:55:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:55:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:55:51,560 INFO L87 Difference]: Start difference. First operand 2223 states and 3444 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-28 23:55:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:52,602 INFO L93 Difference]: Finished difference Result 4240 states and 6616 transitions. [2023-11-28 23:55:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:55:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 451 [2023-11-28 23:55:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:52,613 INFO L225 Difference]: With dead ends: 4240 [2023-11-28 23:55:52,613 INFO L226 Difference]: Without dead ends: 2018 [2023-11-28 23:55:52,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 893 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-28 23:55:52,617 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 1109 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:52,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 1316 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 23:55:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-11-28 23:55:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1847. [2023-11-28 23:55:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1674 states have (on average 1.5232974910394266) internal successors, (2550), 1676 states have internal predecessors, (2550), 162 states have call successors, (162), 10 states have call predecessors, (162), 10 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-28 23:55:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2874 transitions. [2023-11-28 23:55:52,706 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2874 transitions. Word has length 451 [2023-11-28 23:55:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:52,706 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2874 transitions. [2023-11-28 23:55:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-28 23:55:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2874 transitions. [2023-11-28 23:55:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-28 23:55:52,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:52,712 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:52,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 23:55:52,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:52,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:52,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1918357909, now seen corresponding path program 1 times [2023-11-28 23:55:52,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:52,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539689973] [2023-11-28 23:55:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:52,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:52,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113298794] [2023-11-28 23:55:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:52,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:52,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:55:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:53,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:55:53,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:55:53,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:55:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539689973] [2023-11-28 23:55:53,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113298794] [2023-11-28 23:55:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113298794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:53,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:55:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702758599] [2023-11-28 23:55:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:53,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:55:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:55:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:55:53,944 INFO L87 Difference]: Start difference. First operand 1847 states and 2874 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:54,857 INFO L93 Difference]: Finished difference Result 8317 states and 12936 transitions. [2023-11-28 23:55:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:55:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 451 [2023-11-28 23:55:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:54,889 INFO L225 Difference]: With dead ends: 8317 [2023-11-28 23:55:54,889 INFO L226 Difference]: Without dead ends: 6471 [2023-11-28 23:55:54,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-28 23:55:54,895 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 4925 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4925 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:54,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4925 Valid, 2387 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:55:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2023-11-28 23:55:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 1669. [2023-11-28 23:55:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1534 states have (on average 1.5228161668839635) internal successors, (2336), 1534 states have internal predecessors, (2336), 126 states have call successors, (126), 8 states have call predecessors, (126), 8 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-28 23:55:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2588 transitions. [2023-11-28 23:55:55,041 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2588 transitions. Word has length 451 [2023-11-28 23:55:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:55,042 INFO L495 AbstractCegarLoop]: Abstraction has 1669 states and 2588 transitions. [2023-11-28 23:55:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:55:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2588 transitions. [2023-11-28 23:55:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-28 23:55:55,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:55,049 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:55,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 23:55:55,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:55,250 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:55,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash 112919575, now seen corresponding path program 1 times [2023-11-28 23:55:55,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:55,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750022553] [2023-11-28 23:55:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:55,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:55,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966489006] [2023-11-28 23:55:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:55,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:55,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:55:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:55:55,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1418 proven. 168 refuted. 0 times theorem prover too weak. 6226 trivial. 0 not checked. [2023-11-28 23:55:56,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 18 proven. 168 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:55:56,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750022553] [2023-11-28 23:55:56,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:55:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966489006] [2023-11-28 23:55:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966489006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:56,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:55:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-11-28 23:55:56,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991129033] [2023-11-28 23:55:56,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:55:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:55:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:55:56,732 INFO L87 Difference]: Start difference. First operand 1669 states and 2588 transitions. Second operand has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-28 23:55:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:57,191 INFO L93 Difference]: Finished difference Result 3353 states and 5189 transitions. [2023-11-28 23:55:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:55:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 451 [2023-11-28 23:55:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:57,200 INFO L225 Difference]: With dead ends: 3353 [2023-11-28 23:55:57,200 INFO L226 Difference]: Without dead ends: 1685 [2023-11-28 23:55:57,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:55:57,204 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:57,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1115 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:55:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2023-11-28 23:55:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1677. [2023-11-28 23:55:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1540 states have (on average 1.5051948051948052) internal successors, (2318), 1540 states have internal predecessors, (2318), 126 states have call successors, (126), 10 states have call predecessors, (126), 10 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-28 23:55:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2570 transitions. [2023-11-28 23:55:57,270 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2570 transitions. Word has length 451 [2023-11-28 23:55:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:57,271 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2570 transitions. [2023-11-28 23:55:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-28 23:55:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2570 transitions. [2023-11-28 23:55:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-28 23:55:57,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:57,279 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:57,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:55:57,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 23:55:57,480 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:57,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 173237481, now seen corresponding path program 1 times [2023-11-28 23:55:57,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:57,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587204287] [2023-11-28 23:55:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:57,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:55:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529552166] [2023-11-28 23:55:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:57,548 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:57,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:55:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:58,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 23:55:58,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 62 proven. 186 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 23:55:58,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587204287] [2023-11-28 23:56:13,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529552166] [2023-11-28 23:56:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529552166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:13,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:56:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-28 23:56:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282420578] [2023-11-28 23:56:13,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:13,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 23:56:13,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 23:56:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:56:13,799 INFO L87 Difference]: Start difference. First operand 1677 states and 2570 transitions. Second operand has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:56:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:18,501 INFO L93 Difference]: Finished difference Result 6527 states and 9925 transitions. [2023-11-28 23:56:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-28 23:56:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 452 [2023-11-28 23:56:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:18,510 INFO L225 Difference]: With dead ends: 6527 [2023-11-28 23:56:18,510 INFO L226 Difference]: Without dead ends: 4851 [2023-11-28 23:56:18,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=706, Invalid=2264, Unknown=0, NotChecked=0, Total=2970 [2023-11-28 23:56:18,515 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 4029 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4030 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:18,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4030 Valid, 3619 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-28 23:56:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2023-11-28 23:56:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 2367. [2023-11-28 23:56:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2228 states have (on average 1.5040394973070017) internal successors, (3351), 2228 states have internal predecessors, (3351), 126 states have call successors, (126), 12 states have call predecessors, (126), 12 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-28 23:56:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3603 transitions. [2023-11-28 23:56:18,700 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3603 transitions. Word has length 452 [2023-11-28 23:56:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:18,700 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3603 transitions. [2023-11-28 23:56:18,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:56:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3603 transitions. [2023-11-28 23:56:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-28 23:56:18,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:18,709 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:18,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:56:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:56:18,910 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:18,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1483200873, now seen corresponding path program 1 times [2023-11-28 23:56:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617486231] [2023-11-28 23:56:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:18,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:18,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706164783] [2023-11-28 23:56:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:18,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:18,973 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:56:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:19,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:56:19,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:56:19,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:56:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617486231] [2023-11-28 23:56:19,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706164783] [2023-11-28 23:56:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706164783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:56:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919730586] [2023-11-28 23:56:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:56:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:56:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:19,448 INFO L87 Difference]: Start difference. First operand 2367 states and 3603 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:20,631 INFO L93 Difference]: Finished difference Result 4917 states and 7481 transitions. [2023-11-28 23:56:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:56:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 452 [2023-11-28 23:56:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:20,640 INFO L225 Difference]: With dead ends: 4917 [2023-11-28 23:56:20,640 INFO L226 Difference]: Without dead ends: 2463 [2023-11-28 23:56:20,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:56:20,645 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 1320 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:20,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1459 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:56:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2023-11-28 23:56:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2173. [2023-11-28 23:56:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2034 states have (on average 1.4872173058013767) internal successors, (3025), 2034 states have internal predecessors, (3025), 126 states have call successors, (126), 12 states have call predecessors, (126), 12 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-28 23:56:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3277 transitions. [2023-11-28 23:56:20,766 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3277 transitions. Word has length 452 [2023-11-28 23:56:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:20,767 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3277 transitions. [2023-11-28 23:56:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3277 transitions. [2023-11-28 23:56:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-28 23:56:20,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:20,774 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:20,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 23:56:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:20,975 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:20,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -883493721, now seen corresponding path program 1 times [2023-11-28 23:56:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845627092] [2023-11-28 23:56:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:21,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:21,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950113670] [2023-11-28 23:56:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:21,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:21,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:56:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:21,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 23:56:21,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 62 proven. 186 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 23:56:22,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845627092] [2023-11-28 23:56:24,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950113670] [2023-11-28 23:56:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950113670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:24,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:56:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-28 23:56:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309284685] [2023-11-28 23:56:24,802 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:24,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:56:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:56:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:56:24,804 INFO L87 Difference]: Start difference. First operand 2173 states and 3277 transitions. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 9 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:56:29,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-28 23:56:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:29,923 INFO L93 Difference]: Finished difference Result 9440 states and 14266 transitions. [2023-11-28 23:56:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:56:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 9 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 452 [2023-11-28 23:56:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:29,940 INFO L225 Difference]: With dead ends: 9440 [2023-11-28 23:56:29,941 INFO L226 Difference]: Without dead ends: 7268 [2023-11-28 23:56:29,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:56:29,947 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1687 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:29,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1687 Valid, 3498 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-28 23:56:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7268 states. [2023-11-28 23:56:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7268 to 2804. [2023-11-28 23:56:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2596 states have (on average 1.4784283513097072) internal successors, (3838), 2596 states have internal predecessors, (3838), 189 states have call successors, (189), 18 states have call predecessors, (189), 18 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-28 23:56:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4216 transitions. [2023-11-28 23:56:30,205 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4216 transitions. Word has length 452 [2023-11-28 23:56:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:30,206 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4216 transitions. [2023-11-28 23:56:30,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 9 states have internal predecessors, (143), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-28 23:56:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4216 transitions. [2023-11-28 23:56:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-28 23:56:30,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:30,214 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:30,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 23:56:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:30,415 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:30,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1546050294, now seen corresponding path program 1 times [2023-11-28 23:56:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:30,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001001279] [2023-11-28 23:56:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:30,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:30,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56139359] [2023-11-28 23:56:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:30,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:30,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:30,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:56:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:30,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 23:56:30,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:56:31,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:56:31,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:31,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001001279] [2023-11-28 23:56:31,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:31,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56139359] [2023-11-28 23:56:31,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56139359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:31,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:31,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:56:31,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270465974] [2023-11-28 23:56:31,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:31,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:56:31,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:56:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:56:31,319 INFO L87 Difference]: Start difference. First operand 2804 states and 4216 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:31,855 INFO L93 Difference]: Finished difference Result 6868 states and 10352 transitions. [2023-11-28 23:56:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:56:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 453 [2023-11-28 23:56:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:31,865 INFO L225 Difference]: With dead ends: 6868 [2023-11-28 23:56:31,865 INFO L226 Difference]: Without dead ends: 4696 [2023-11-28 23:56:31,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:31,868 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 448 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:31,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1203 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:56:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2023-11-28 23:56:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3978. [2023-11-28 23:56:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3770 states have (on average 1.489920424403183) internal successors, (5617), 3770 states have internal predecessors, (5617), 189 states have call successors, (189), 18 states have call predecessors, (189), 18 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-28 23:56:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5995 transitions. [2023-11-28 23:56:32,077 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5995 transitions. Word has length 453 [2023-11-28 23:56:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:32,078 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5995 transitions. [2023-11-28 23:56:32,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5995 transitions. [2023-11-28 23:56:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-28 23:56:32,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:32,085 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:32,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:56:32,285 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash 785739785, now seen corresponding path program 1 times [2023-11-28 23:56:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039475525] [2023-11-28 23:56:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:32,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86162953] [2023-11-28 23:56:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:32,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:32,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:32,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 23:56:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:32,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:56:32,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:56:33,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:56:33,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039475525] [2023-11-28 23:56:33,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86162953] [2023-11-28 23:56:33,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86162953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:33,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:33,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:56:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450484289] [2023-11-28 23:56:33,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:56:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:56:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:33,822 INFO L87 Difference]: Start difference. First operand 3978 states and 5995 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:35,086 INFO L93 Difference]: Finished difference Result 8760 states and 13187 transitions. [2023-11-28 23:56:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:56:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 453 [2023-11-28 23:56:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:35,096 INFO L225 Difference]: With dead ends: 8760 [2023-11-28 23:56:35,096 INFO L226 Difference]: Without dead ends: 4910 [2023-11-28 23:56:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:56:35,100 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 389 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:35,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1474 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 23:56:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2023-11-28 23:56:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3978. [2023-11-28 23:56:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3770 states have (on average 1.4896551724137932) internal successors, (5616), 3770 states have internal predecessors, (5616), 189 states have call successors, (189), 18 states have call predecessors, (189), 18 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-28 23:56:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5994 transitions. [2023-11-28 23:56:35,239 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5994 transitions. Word has length 453 [2023-11-28 23:56:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:35,239 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5994 transitions. [2023-11-28 23:56:35,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5994 transitions. [2023-11-28 23:56:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-28 23:56:35,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:35,245 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:35,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 23:56:35,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:56:35,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:35,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 424763854, now seen corresponding path program 1 times [2023-11-28 23:56:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581853146] [2023-11-28 23:56:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:35,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296814905] [2023-11-28 23:56:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:35,508 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:35,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 23:56:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:35,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:56:35,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:56:36,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:56:36,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581853146] [2023-11-28 23:56:36,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296814905] [2023-11-28 23:56:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296814905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:36,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:56:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850801207] [2023-11-28 23:56:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:56:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:56:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:56:36,019 INFO L87 Difference]: Start difference. First operand 3978 states and 5994 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:36,545 INFO L93 Difference]: Finished difference Result 13932 states and 21108 transitions. [2023-11-28 23:56:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:56:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-28 23:56:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:36,557 INFO L225 Difference]: With dead ends: 13932 [2023-11-28 23:56:36,558 INFO L226 Difference]: Without dead ends: 10232 [2023-11-28 23:56:36,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:36,562 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 727 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:36,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1555 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:56:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2023-11-28 23:56:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 8664. [2023-11-28 23:56:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 8405 states have (on average 1.4947055324211778) internal successors, (12563), 8407 states have internal predecessors, (12563), 229 states have call successors, (229), 29 states have call predecessors, (229), 29 states have return successors, (229), 227 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-28 23:56:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 13021 transitions. [2023-11-28 23:56:36,823 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 13021 transitions. Word has length 454 [2023-11-28 23:56:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 8664 states and 13021 transitions. [2023-11-28 23:56:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:56:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 13021 transitions. [2023-11-28 23:56:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-28 23:56:36,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:36,835 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:36,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 23:56:37,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:37,036 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:37,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1300782860, now seen corresponding path program 1 times [2023-11-28 23:56:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253158979] [2023-11-28 23:56:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:37,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:37,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863470850] [2023-11-28 23:56:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:37,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:37,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 23:56:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:37,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:56:37,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3462 proven. 126 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2023-11-28 23:56:37,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:56:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253158979] [2023-11-28 23:56:38,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863470850] [2023-11-28 23:56:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863470850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:38,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:56:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-28 23:56:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080521271] [2023-11-28 23:56:38,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:56:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:56:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:56:38,303 INFO L87 Difference]: Start difference. First operand 8664 states and 13021 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-28 23:56:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:38,931 INFO L93 Difference]: Finished difference Result 12910 states and 19361 transitions. [2023-11-28 23:56:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:56:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 454 [2023-11-28 23:56:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:38,939 INFO L225 Difference]: With dead ends: 12910 [2023-11-28 23:56:38,939 INFO L226 Difference]: Without dead ends: 6141 [2023-11-28 23:56:38,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 900 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:56:38,946 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 236 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:38,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 974 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:56:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2023-11-28 23:56:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 6123. [2023-11-28 23:56:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 5861 states have (on average 1.47142125917079) internal successors, (8624), 5863 states have internal predecessors, (8624), 229 states have call successors, (229), 32 states have call predecessors, (229), 32 states have return successors, (229), 227 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-28 23:56:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 9082 transitions. [2023-11-28 23:56:39,276 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 9082 transitions. Word has length 454 [2023-11-28 23:56:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:39,277 INFO L495 AbstractCegarLoop]: Abstraction has 6123 states and 9082 transitions. [2023-11-28 23:56:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-28 23:56:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 9082 transitions. [2023-11-28 23:56:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-28 23:56:39,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:39,286 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:39,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 23:56:39,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:39,487 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:39,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1455804752, now seen corresponding path program 1 times [2023-11-28 23:56:39,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:39,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918015776] [2023-11-28 23:56:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:39,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:56:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217150245] [2023-11-28 23:56:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:39,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:39,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 23:56:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:40,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:56:40,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 126 proven. 366 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-28 23:56:41,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-28 23:56:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918015776] [2023-11-28 23:56:48,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:56:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217150245] [2023-11-28 23:56:48,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217150245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:48,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:56:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-28 23:56:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279570606] [2023-11-28 23:56:48,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:56:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:56:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:56:48,748 INFO L87 Difference]: Start difference. First operand 6123 states and 9082 transitions. Second operand has 30 states, 29 states have (on average 8.689655172413794) internal successors, (252), 28 states have internal predecessors, (252), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) [2023-11-28 23:57:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:09,137 INFO L93 Difference]: Finished difference Result 37271 states and 55107 transitions. [2023-11-28 23:57:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-28 23:57:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 8.689655172413794) internal successors, (252), 28 states have internal predecessors, (252), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) Word has length 454 [2023-11-28 23:57:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:09,172 INFO L225 Difference]: With dead ends: 37271 [2023-11-28 23:57:09,172 INFO L226 Difference]: Without dead ends: 33112 [2023-11-28 23:57:09,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3681, Invalid=18969, Unknown=0, NotChecked=0, Total=22650 [2023-11-28 23:57:09,190 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 16946 mSDsluCounter, 10212 mSDsCounter, 0 mSdLazyCounter, 7576 mSolverCounterSat, 1909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16949 SdHoareTripleChecker+Valid, 10808 SdHoareTripleChecker+Invalid, 9485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1909 IncrementalHoareTripleChecker+Valid, 7576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16949 Valid, 10808 Invalid, 9485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1909 Valid, 7576 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2023-11-28 23:57:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33112 states. [2023-11-28 23:57:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33112 to 15908. [2023-11-28 23:57:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15908 states, 15348 states have (on average 1.462796455564243) internal successors, (22451), 15354 states have internal predecessors, (22451), 478 states have call successors, (478), 81 states have call predecessors, (478), 81 states have return successors, (478), 472 states have call predecessors, (478), 478 states have call successors, (478) [2023-11-28 23:57:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15908 states to 15908 states and 23407 transitions. [2023-11-28 23:57:10,153 INFO L78 Accepts]: Start accepts. Automaton has 15908 states and 23407 transitions. Word has length 454 [2023-11-28 23:57:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:10,154 INFO L495 AbstractCegarLoop]: Abstraction has 15908 states and 23407 transitions. [2023-11-28 23:57:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 8.689655172413794) internal successors, (252), 28 states have internal predecessors, (252), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) [2023-11-28 23:57:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15908 states and 23407 transitions. [2023-11-28 23:57:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-28 23:57:10,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:10,171 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:10,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 23:57:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 23:57:10,372 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -399057776, now seen corresponding path program 1 times [2023-11-28 23:57:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916576897] [2023-11-28 23:57:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:10,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:57:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880381336] [2023-11-28 23:57:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:10,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:10,436 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:10,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 23:57:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:10,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:10,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:57:11,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916576897] [2023-11-28 23:57:11,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:57:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880381336] [2023-11-28 23:57:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880381336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:11,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:57:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261458627] [2023-11-28 23:57:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:57:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:57:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:57:11,386 INFO L87 Difference]: Start difference. First operand 15908 states and 23407 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:57:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:14,738 INFO L93 Difference]: Finished difference Result 59654 states and 87869 transitions. [2023-11-28 23:57:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:57:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-28 23:57:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:14,795 INFO L225 Difference]: With dead ends: 59654 [2023-11-28 23:57:14,795 INFO L226 Difference]: Without dead ends: 49926 [2023-11-28 23:57:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:57:14,807 INFO L413 NwaCegarLoop]: 899 mSDtfsCounter, 2058 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 4061 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:14,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2058 Valid, 4061 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-28 23:57:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49926 states. [2023-11-28 23:57:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49926 to 39602. [2023-11-28 23:57:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39602 states, 38070 states have (on average 1.461097977410034) internal successors, (55624), 38088 states have internal predecessors, (55624), 1308 states have call successors, (1308), 223 states have call predecessors, (1308), 223 states have return successors, (1308), 1290 states have call predecessors, (1308), 1308 states have call successors, (1308) [2023-11-28 23:57:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39602 states to 39602 states and 58240 transitions. [2023-11-28 23:57:16,360 INFO L78 Accepts]: Start accepts. Automaton has 39602 states and 58240 transitions. Word has length 454 [2023-11-28 23:57:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:16,361 INFO L495 AbstractCegarLoop]: Abstraction has 39602 states and 58240 transitions. [2023-11-28 23:57:16,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:57:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 39602 states and 58240 transitions. [2023-11-28 23:57:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-28 23:57:16,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:16,381 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:16,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 23:57:16,582 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:16,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash 652578634, now seen corresponding path program 1 times [2023-11-28 23:57:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242361927] [2023-11-28 23:57:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:16,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:57:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675483071] [2023-11-28 23:57:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:16,635 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 23:57:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:17,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 23:57:17,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 126 proven. 366 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-28 23:57:18,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-28 23:57:23,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242361927] [2023-11-28 23:57:23,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:57:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675483071] [2023-11-28 23:57:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675483071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:23,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:23,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-11-28 23:57:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996604980] [2023-11-28 23:57:23,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:23,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 23:57:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 23:57:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:57:23,643 INFO L87 Difference]: Start difference. First operand 39602 states and 58240 transitions. Second operand has 25 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-28 23:57:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:33,615 INFO L93 Difference]: Finished difference Result 115524 states and 170079 transitions. [2023-11-28 23:57:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-28 23:57:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) Word has length 455 [2023-11-28 23:57:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:33,717 INFO L225 Difference]: With dead ends: 115524 [2023-11-28 23:57:33,718 INFO L226 Difference]: Without dead ends: 105343 [2023-11-28 23:57:33,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 891 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1344, Invalid=3626, Unknown=0, NotChecked=0, Total=4970 [2023-11-28 23:57:33,737 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 9743 mSDsluCounter, 5708 mSDsCounter, 0 mSdLazyCounter, 3739 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9745 SdHoareTripleChecker+Valid, 6138 SdHoareTripleChecker+Invalid, 5021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 3739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:33,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9745 Valid, 6138 Invalid, 5021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1282 Valid, 3739 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-28 23:57:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105343 states. [2023-11-28 23:57:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105343 to 50487. [2023-11-28 23:57:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50487 states, 48469 states have (on average 1.4593657801893993) internal successors, (70734), 48493 states have internal predecessors, (70734), 1723 states have call successors, (1723), 294 states have call predecessors, (1723), 294 states have return successors, (1723), 1699 states have call predecessors, (1723), 1723 states have call successors, (1723) [2023-11-28 23:57:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50487 states to 50487 states and 74180 transitions. [2023-11-28 23:57:36,402 INFO L78 Accepts]: Start accepts. Automaton has 50487 states and 74180 transitions. Word has length 455 [2023-11-28 23:57:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:36,402 INFO L495 AbstractCegarLoop]: Abstraction has 50487 states and 74180 transitions. [2023-11-28 23:57:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-28 23:57:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50487 states and 74180 transitions. [2023-11-28 23:57:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-28 23:57:36,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:36,418 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:36,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 23:57:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-28 23:57:36,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:36,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1639052889, now seen corresponding path program 1 times [2023-11-28 23:57:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230646182] [2023-11-28 23:57:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:36,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:57:36,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200297211] [2023-11-28 23:57:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:36,670 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:36,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 23:57:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:37,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 23:57:37,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1476 proven. 330 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2023-11-28 23:57:38,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 18 proven. 168 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:57:38,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230646182] [2023-11-28 23:57:38,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:57:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200297211] [2023-11-28 23:57:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200297211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:38,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-28 23:57:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313483769] [2023-11-28 23:57:38,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:57:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:57:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:57:38,847 INFO L87 Difference]: Start difference. First operand 50487 states and 74180 transitions. Second operand has 13 states, 13 states have (on average 21.46153846153846) internal successors, (279), 12 states have internal predecessors, (279), 4 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-28 23:57:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:43,662 INFO L93 Difference]: Finished difference Result 109547 states and 159023 transitions. [2023-11-28 23:57:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 23:57:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.46153846153846) internal successors, (279), 12 states have internal predecessors, (279), 4 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) Word has length 455 [2023-11-28 23:57:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:43,750 INFO L225 Difference]: With dead ends: 109547 [2023-11-28 23:57:43,750 INFO L226 Difference]: Without dead ends: 71847 [2023-11-28 23:57:43,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:57:43,777 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 1417 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:43,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 2591 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 23:57:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71847 states. [2023-11-28 23:57:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71847 to 49156. [2023-11-28 23:57:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49156 states, 47097 states have (on average 1.4512813979659) internal successors, (68351), 47121 states have internal predecessors, (68351), 1723 states have call successors, (1723), 335 states have call predecessors, (1723), 335 states have return successors, (1723), 1699 states have call predecessors, (1723), 1723 states have call successors, (1723) [2023-11-28 23:57:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49156 states to 49156 states and 71797 transitions. [2023-11-28 23:57:46,105 INFO L78 Accepts]: Start accepts. Automaton has 49156 states and 71797 transitions. Word has length 455 [2023-11-28 23:57:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:46,105 INFO L495 AbstractCegarLoop]: Abstraction has 49156 states and 71797 transitions. [2023-11-28 23:57:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.46153846153846) internal successors, (279), 12 states have internal predecessors, (279), 4 states have call successors, (119), 3 states have call predecessors, (119), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-28 23:57:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 49156 states and 71797 transitions. [2023-11-28 23:57:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-28 23:57:46,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:46,120 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:46,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 23:57:46,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:46,321 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:46,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2111046092, now seen corresponding path program 1 times [2023-11-28 23:57:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428206494] [2023-11-28 23:57:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:46,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:57:46,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085455182] [2023-11-28 23:57:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:46,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:46,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 23:57:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:46,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:57:46,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:57:46,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:46,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:46,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428206494] [2023-11-28 23:57:46,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:57:46,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085455182] [2023-11-28 23:57:46,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085455182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:46,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:46,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:46,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734094233] [2023-11-28 23:57:46,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:46,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:57:46,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:57:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:46,886 INFO L87 Difference]: Start difference. First operand 49156 states and 71797 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:57:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:49,962 INFO L93 Difference]: Finished difference Result 98077 states and 143165 transitions. [2023-11-28 23:57:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:57:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 457 [2023-11-28 23:57:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:50,071 INFO L225 Difference]: With dead ends: 98077 [2023-11-28 23:57:50,071 INFO L226 Difference]: Without dead ends: 59713 [2023-11-28 23:57:50,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:50,087 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 361 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:50,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 889 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59713 states. [2023-11-28 23:57:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59713 to 49156. [2023-11-28 23:57:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49156 states, 47097 states have (on average 1.4392211818162515) internal successors, (67783), 47121 states have internal predecessors, (67783), 1723 states have call successors, (1723), 335 states have call predecessors, (1723), 335 states have return successors, (1723), 1699 states have call predecessors, (1723), 1723 states have call successors, (1723) [2023-11-28 23:57:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49156 states to 49156 states and 71229 transitions. [2023-11-28 23:57:52,671 INFO L78 Accepts]: Start accepts. Automaton has 49156 states and 71229 transitions. Word has length 457 [2023-11-28 23:57:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:52,671 INFO L495 AbstractCegarLoop]: Abstraction has 49156 states and 71229 transitions. [2023-11-28 23:57:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:57:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 49156 states and 71229 transitions. [2023-11-28 23:57:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-28 23:57:52,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:52,691 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:52,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 23:57:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 23:57:52,891 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:52,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2037453044, now seen corresponding path program 1 times [2023-11-28 23:57:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024238612] [2023-11-28 23:57:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:52,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:57:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108358906] [2023-11-28 23:57:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:52,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:52,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:52,946 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:52,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 23:57:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:53,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:57:53,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:57:53,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024238612] [2023-11-28 23:57:53,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:57:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108358906] [2023-11-28 23:57:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108358906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:53,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:53,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 23:57:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646916406] [2023-11-28 23:57:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:57:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:57:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:57:53,789 INFO L87 Difference]: Start difference. First operand 49156 states and 71229 transitions. Second operand has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:02,962 INFO L93 Difference]: Finished difference Result 135529 states and 199993 transitions. [2023-11-28 23:58:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 23:58:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 457 [2023-11-28 23:58:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:03,065 INFO L225 Difference]: With dead ends: 135529 [2023-11-28 23:58:03,065 INFO L226 Difference]: Without dead ends: 85712 [2023-11-28 23:58:03,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-11-28 23:58:03,093 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 2498 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:03,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2498 Valid, 3513 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-28 23:58:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85712 states. [2023-11-28 23:58:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85712 to 48731. [2023-11-28 23:58:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48731 states, 45208 states have (on average 1.4265616705007964) internal successors, (64492), 45252 states have internal predecessors, (64492), 2967 states have call successors, (2967), 555 states have call predecessors, (2967), 555 states have return successors, (2967), 2923 states have call predecessors, (2967), 2967 states have call successors, (2967) [2023-11-28 23:58:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48731 states to 48731 states and 70426 transitions. [2023-11-28 23:58:06,762 INFO L78 Accepts]: Start accepts. Automaton has 48731 states and 70426 transitions. Word has length 457 [2023-11-28 23:58:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:06,762 INFO L495 AbstractCegarLoop]: Abstraction has 48731 states and 70426 transitions. [2023-11-28 23:58:06,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 48731 states and 70426 transitions. [2023-11-28 23:58:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-28 23:58:06,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:06,779 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:06,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-28 23:58:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 23:58:06,980 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:06,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 513431303, now seen corresponding path program 1 times [2023-11-28 23:58:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942227034] [2023-11-28 23:58:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:07,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:58:07,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739737257] [2023-11-28 23:58:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:07,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:07,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 23:58:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:07,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:58:07,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:58:07,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:58:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942227034] [2023-11-28 23:58:07,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:58:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739737257] [2023-11-28 23:58:07,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739737257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:58:07,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:58:07,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:58:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251382459] [2023-11-28 23:58:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:58:07,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:58:07,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:58:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:58:07,633 INFO L87 Difference]: Start difference. First operand 48731 states and 70426 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:11,729 INFO L93 Difference]: Finished difference Result 92445 states and 133332 transitions. [2023-11-28 23:58:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:58:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 457 [2023-11-28 23:58:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:11,784 INFO L225 Difference]: With dead ends: 92445 [2023-11-28 23:58:11,784 INFO L226 Difference]: Without dead ends: 53593 [2023-11-28 23:58:11,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:58:11,808 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 570 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:11,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1321 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:58:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53593 states. [2023-11-28 23:58:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53593 to 38440. [2023-11-28 23:58:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38440 states, 35125 states have (on average 1.4214946619217081) internal successors, (49930), 35161 states have internal predecessors, (49930), 2807 states have call successors, (2807), 507 states have call predecessors, (2807), 507 states have return successors, (2807), 2771 states have call predecessors, (2807), 2807 states have call successors, (2807) [2023-11-28 23:58:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38440 states to 38440 states and 55544 transitions. [2023-11-28 23:58:15,055 INFO L78 Accepts]: Start accepts. Automaton has 38440 states and 55544 transitions. Word has length 457 [2023-11-28 23:58:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:15,055 INFO L495 AbstractCegarLoop]: Abstraction has 38440 states and 55544 transitions. [2023-11-28 23:58:15,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 38440 states and 55544 transitions. [2023-11-28 23:58:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-28 23:58:15,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:15,065 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 23:58:15,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 23:58:15,266 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:15,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash 135495388, now seen corresponding path program 1 times [2023-11-28 23:58:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262675549] [2023-11-28 23:58:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:15,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:15,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:58:15,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002274575] [2023-11-28 23:58:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:15,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:15,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:15,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:15,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 23:58:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:15,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:58:15,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:58:15,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:58:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262675549] [2023-11-28 23:58:15,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:58:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002274575] [2023-11-28 23:58:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002274575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:58:15,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:58:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:58:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274062931] [2023-11-28 23:58:15,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:58:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:58:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:58:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:58:15,912 INFO L87 Difference]: Start difference. First operand 38440 states and 55544 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:18,829 INFO L93 Difference]: Finished difference Result 62839 states and 90824 transitions. [2023-11-28 23:58:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:58:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 458 [2023-11-28 23:58:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:18,863 INFO L225 Difference]: With dead ends: 62839 [2023-11-28 23:58:18,864 INFO L226 Difference]: Without dead ends: 30066 [2023-11-28 23:58:18,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:58:18,889 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 575 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:18,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1242 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:58:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30066 states. [2023-11-28 23:58:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30066 to 26904. [2023-11-28 23:58:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 23901 states have (on average 1.407179615915652) internal successors, (33633), 23925 states have internal predecessors, (33633), 2567 states have call successors, (2567), 435 states have call predecessors, (2567), 435 states have return successors, (2567), 2543 states have call predecessors, (2567), 2567 states have call successors, (2567) [2023-11-28 23:58:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 38767 transitions. [2023-11-28 23:58:21,677 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 38767 transitions. Word has length 458 [2023-11-28 23:58:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:21,677 INFO L495 AbstractCegarLoop]: Abstraction has 26904 states and 38767 transitions. [2023-11-28 23:58:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 38767 transitions. [2023-11-28 23:58:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-28 23:58:21,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:21,687 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:21,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-28 23:58:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 23:58:21,888 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:21,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 825316382, now seen corresponding path program 1 times [2023-11-28 23:58:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646401080] [2023-11-28 23:58:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:21,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:58:21,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520929559] [2023-11-28 23:58:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:21,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:21,936 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 23:58:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:22,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:58:22,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3850 proven. 447 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2023-11-28 23:58:23,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 93 proven. 456 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2023-11-28 23:58:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646401080] [2023-11-28 23:58:29,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:58:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520929559] [2023-11-28 23:58:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520929559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:29,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:29,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-11-28 23:58:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836933967] [2023-11-28 23:58:29,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:29,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 23:58:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 23:58:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-11-28 23:58:29,786 INFO L87 Difference]: Start difference. First operand 26904 states and 38767 transitions. Second operand has 32 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 7 states have call successors, (125), 4 states have call predecessors, (125), 9 states have return successors, (126), 6 states have call predecessors, (126), 7 states have call successors, (126) [2023-11-28 23:58:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:48,845 INFO L93 Difference]: Finished difference Result 96458 states and 139032 transitions. [2023-11-28 23:58:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-28 23:58:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 7 states have call successors, (125), 4 states have call predecessors, (125), 9 states have return successors, (126), 6 states have call predecessors, (126), 7 states have call successors, (126) Word has length 458 [2023-11-28 23:58:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:48,919 INFO L225 Difference]: With dead ends: 96458 [2023-11-28 23:58:48,919 INFO L226 Difference]: Without dead ends: 75327 [2023-11-28 23:58:48,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6603 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3422, Invalid=16318, Unknown=0, NotChecked=0, Total=19740 [2023-11-28 23:58:48,945 INFO L413 NwaCegarLoop]: 817 mSDtfsCounter, 9182 mSDsluCounter, 9187 mSDsCounter, 0 mSdLazyCounter, 6311 mSolverCounterSat, 1139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9183 SdHoareTripleChecker+Valid, 10004 SdHoareTripleChecker+Invalid, 7450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1139 IncrementalHoareTripleChecker+Valid, 6311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:48,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9183 Valid, 10004 Invalid, 7450 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1139 Valid, 6311 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-11-28 23:58:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75327 states. [2023-11-28 23:58:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75327 to 37854. [2023-11-28 23:58:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37854 states, 34799 states have (on average 1.4217649932469323) internal successors, (49476), 34819 states have internal predecessors, (49476), 2583 states have call successors, (2583), 471 states have call predecessors, (2583), 471 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-28 23:58:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37854 states to 37854 states and 54642 transitions. [2023-11-28 23:58:52,707 INFO L78 Accepts]: Start accepts. Automaton has 37854 states and 54642 transitions. Word has length 458 [2023-11-28 23:58:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:52,707 INFO L495 AbstractCegarLoop]: Abstraction has 37854 states and 54642 transitions. [2023-11-28 23:58:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 8.612903225806452) internal successors, (267), 30 states have internal predecessors, (267), 7 states have call successors, (125), 4 states have call predecessors, (125), 9 states have return successors, (126), 6 states have call predecessors, (126), 7 states have call successors, (126) [2023-11-28 23:58:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 37854 states and 54642 transitions. [2023-11-28 23:58:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-28 23:58:52,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:52,716 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:52,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-28 23:58:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 23:58:52,917 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:52,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -213904668, now seen corresponding path program 1 times [2023-11-28 23:58:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663696797] [2023-11-28 23:58:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:52,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:58:52,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512900915] [2023-11-28 23:58:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:52,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:52,984 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:52,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 23:58:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:53,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:58:53,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:58:53,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:58:53,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:53,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663696797] [2023-11-28 23:58:53,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:58:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512900915] [2023-11-28 23:58:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512900915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:58:53,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:58:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:58:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28416810] [2023-11-28 23:58:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:58:53,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:58:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:58:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:58:53,803 INFO L87 Difference]: Start difference. First operand 37854 states and 54642 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:58:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:57,037 INFO L93 Difference]: Finished difference Result 71177 states and 102772 transitions. [2023-11-28 23:58:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:58:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 458 [2023-11-28 23:58:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:57,077 INFO L225 Difference]: With dead ends: 71177 [2023-11-28 23:58:57,077 INFO L226 Difference]: Without dead ends: 39556 [2023-11-28 23:58:57,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:58:57,096 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 767 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:57,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1422 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:58:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39556 states. [2023-11-28 23:59:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39556 to 37854. [2023-11-28 23:59:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37854 states, 34799 states have (on average 1.4216500474151557) internal successors, (49472), 34819 states have internal predecessors, (49472), 2583 states have call successors, (2583), 471 states have call predecessors, (2583), 471 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-28 23:59:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37854 states to 37854 states and 54638 transitions. [2023-11-28 23:59:00,275 INFO L78 Accepts]: Start accepts. Automaton has 37854 states and 54638 transitions. Word has length 458 [2023-11-28 23:59:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:00,275 INFO L495 AbstractCegarLoop]: Abstraction has 37854 states and 54638 transitions. [2023-11-28 23:59:00,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:59:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37854 states and 54638 transitions. [2023-11-28 23:59:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-28 23:59:00,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:00,283 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:00,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-28 23:59:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:00,484 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:59:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 476903489, now seen corresponding path program 1 times [2023-11-28 23:59:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:59:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405300243] [2023-11-28 23:59:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:59:00,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:59:00,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162173196] [2023-11-28 23:59:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:00,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:59:00,540 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:59:00,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 23:59:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:59:01,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:59:01,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:59:01,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:59:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:59:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405300243] [2023-11-28 23:59:01,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:59:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162173196] [2023-11-28 23:59:01,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162173196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:59:01,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:59:01,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:59:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560604526] [2023-11-28 23:59:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:59:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:59:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:59:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:59:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:59:01,304 INFO L87 Difference]: Start difference. First operand 37854 states and 54638 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:59:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:06,276 INFO L93 Difference]: Finished difference Result 89714 states and 130957 transitions. [2023-11-28 23:59:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:59:06,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 459 [2023-11-28 23:59:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:06,338 INFO L225 Difference]: With dead ends: 89714 [2023-11-28 23:59:06,338 INFO L226 Difference]: Without dead ends: 56684 [2023-11-28 23:59:06,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:59:06,369 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 1430 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:06,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 1773 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:59:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56684 states. [2023-11-28 23:59:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56684 to 37854. [2023-11-28 23:59:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37854 states, 34799 states have (on average 1.4174832610132475) internal successors, (49327), 34819 states have internal predecessors, (49327), 2583 states have call successors, (2583), 471 states have call predecessors, (2583), 471 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-28 23:59:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37854 states to 37854 states and 54493 transitions. [2023-11-28 23:59:09,654 INFO L78 Accepts]: Start accepts. Automaton has 37854 states and 54493 transitions. Word has length 459 [2023-11-28 23:59:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:09,654 INFO L495 AbstractCegarLoop]: Abstraction has 37854 states and 54493 transitions. [2023-11-28 23:59:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:59:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 37854 states and 54493 transitions. [2023-11-28 23:59:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-28 23:59:09,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:09,662 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:09,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-28 23:59:09,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-28 23:59:09,862 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:59:09,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash 718530292, now seen corresponding path program 1 times [2023-11-28 23:59:09,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:59:09,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540526264] [2023-11-28 23:59:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:09,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:59:09,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:59:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237236101] [2023-11-28 23:59:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:09,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:59:09,910 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:59:09,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 23:59:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:59:10,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:59:10,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-28 23:59:11,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:59:11,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:59:11,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540526264] [2023-11-28 23:59:11,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:59:11,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237236101] [2023-11-28 23:59:11,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237236101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:59:11,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:59:11,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:59:11,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350484445] [2023-11-28 23:59:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:59:11,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:59:11,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:59:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:59:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:59:11,463 INFO L87 Difference]: Start difference. First operand 37854 states and 54493 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:59:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:14,619 INFO L93 Difference]: Finished difference Result 74407 states and 107044 transitions. [2023-11-28 23:59:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:59:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 459 [2023-11-28 23:59:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:14,656 INFO L225 Difference]: With dead ends: 74407 [2023-11-28 23:59:14,656 INFO L226 Difference]: Without dead ends: 36969 [2023-11-28 23:59:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:59:14,675 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 322 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1220 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:59:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36969 states. [2023-11-28 23:59:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36969 to 35395. [2023-11-28 23:59:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35395 states, 32340 states have (on average 1.4153370439084725) internal successors, (45772), 32360 states have internal predecessors, (45772), 2583 states have call successors, (2583), 471 states have call predecessors, (2583), 471 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-28 23:59:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35395 states to 35395 states and 50938 transitions. [2023-11-28 23:59:17,823 INFO L78 Accepts]: Start accepts. Automaton has 35395 states and 50938 transitions. Word has length 459 [2023-11-28 23:59:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 35395 states and 50938 transitions. [2023-11-28 23:59:17,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-28 23:59:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 35395 states and 50938 transitions. [2023-11-28 23:59:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-28 23:59:17,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:17,830 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:17,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-28 23:59:18,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:18,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:59:18,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash 900823955, now seen corresponding path program 1 times [2023-11-28 23:59:18,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:59:18,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426301278] [2023-11-28 23:59:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:59:18,073 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:59:18,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138453323] [2023-11-28 23:59:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:18,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:59:18,076 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:59:18,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-28 23:59:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:59:18,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:59:18,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3368 proven. 129 refuted. 0 times theorem prover too weak. 4315 trivial. 0 not checked. [2023-11-28 23:59:18,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:59:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 57 proven. 129 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:59:19,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:59:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426301278] [2023-11-28 23:59:19,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:59:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138453323] [2023-11-28 23:59:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138453323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:59:19,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:59:19,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-28 23:59:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545690614] [2023-11-28 23:59:19,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:59:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:59:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:59:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:59:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:59:19,141 INFO L87 Difference]: Start difference. First operand 35395 states and 50938 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-28 23:59:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:21,140 INFO L93 Difference]: Finished difference Result 55508 states and 79826 transitions. [2023-11-28 23:59:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:59:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 460 [2023-11-28 23:59:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:21,166 INFO L225 Difference]: With dead ends: 55508 [2023-11-28 23:59:21,166 INFO L226 Difference]: Without dead ends: 22478 [2023-11-28 23:59:21,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 912 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:59:21,191 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 479 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:21,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 833 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:59:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22478 states. [2023-11-28 23:59:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22478 to 22270. [2023-11-28 23:59:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22270 states, 20695 states have (on average 1.412031891761295) internal successors, (29222), 20695 states have internal predecessors, (29222), 1323 states have call successors, (1323), 251 states have call predecessors, (1323), 251 states have return successors, (1323), 1323 states have call predecessors, (1323), 1323 states have call successors, (1323) [2023-11-28 23:59:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22270 states to 22270 states and 31868 transitions. [2023-11-28 23:59:22,911 INFO L78 Accepts]: Start accepts. Automaton has 22270 states and 31868 transitions. Word has length 460 [2023-11-28 23:59:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:22,911 INFO L495 AbstractCegarLoop]: Abstraction has 22270 states and 31868 transitions. [2023-11-28 23:59:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-28 23:59:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22270 states and 31868 transitions. [2023-11-28 23:59:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-28 23:59:22,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:22,915 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:22,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-28 23:59:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:23,117 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:59:23,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1130206966, now seen corresponding path program 1 times [2023-11-28 23:59:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:59:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202727819] [2023-11-28 23:59:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:59:23,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:59:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632830787] [2023-11-28 23:59:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:59:23,182 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:59:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-28 23:59:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:59:23,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 23:59:23,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 608 proven. 354 refuted. 0 times theorem prover too weak. 6850 trivial. 0 not checked. [2023-11-28 23:59:25,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:59:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 12 proven. 357 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-28 23:59:26,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:59:26,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202727819] [2023-11-28 23:59:26,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:59:26,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632830787] [2023-11-28 23:59:26,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632830787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:59:26,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:59:26,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-28 23:59:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408726728] [2023-11-28 23:59:26,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:59:26,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 23:59:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:59:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:59:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:59:26,389 INFO L87 Difference]: Start difference. First operand 22270 states and 31868 transitions. Second operand has 20 states, 19 states have (on average 11.421052631578947) internal successors, (217), 18 states have internal predecessors, (217), 6 states have call successors, (126), 4 states have call predecessors, (126), 7 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-28 23:59:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:30,807 INFO L93 Difference]: Finished difference Result 55200 states and 78826 transitions. [2023-11-28 23:59:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 23:59:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 11.421052631578947) internal successors, (217), 18 states have internal predecessors, (217), 6 states have call successors, (126), 4 states have call predecessors, (126), 7 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) Word has length 460 [2023-11-28 23:59:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:30,838 INFO L225 Difference]: With dead ends: 55200 [2023-11-28 23:59:30,839 INFO L226 Difference]: Without dead ends: 33138 [2023-11-28 23:59:30,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1014, Unknown=0, NotChecked=0, Total=1482 [2023-11-28 23:59:30,857 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1666 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:30,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 4027 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-28 23:59:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33138 states. [2023-11-28 23:59:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33138 to 30084. [2023-11-28 23:59:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30084 states, 28508 states have (on average 1.4173916093728076) internal successors, (40407), 28508 states have internal predecessors, (40407), 1323 states have call successors, (1323), 252 states have call predecessors, (1323), 252 states have return successors, (1323), 1323 states have call predecessors, (1323), 1323 states have call successors, (1323) [2023-11-28 23:59:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30084 states to 30084 states and 43053 transitions. [2023-11-28 23:59:32,827 INFO L78 Accepts]: Start accepts. Automaton has 30084 states and 43053 transitions. Word has length 460 [2023-11-28 23:59:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:32,828 INFO L495 AbstractCegarLoop]: Abstraction has 30084 states and 43053 transitions. [2023-11-28 23:59:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 11.421052631578947) internal successors, (217), 18 states have internal predecessors, (217), 6 states have call successors, (126), 4 states have call predecessors, (126), 7 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-28 23:59:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30084 states and 43053 transitions. [2023-11-28 23:59:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-28 23:59:32,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:32,833 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:32,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-28 23:59:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:33,034 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:59:33,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1052474205, now seen corresponding path program 1 times [2023-11-28 23:59:33,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:59:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730975667] [2023-11-28 23:59:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:59:33,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:59:33,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304839531] [2023-11-28 23:59:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:59:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:59:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:59:33,087 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:59:33,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-28 23:59:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:59:33,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:59:33,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 126 proven. 366 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-28 23:59:35,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:59:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3 proven. 183 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-28 23:59:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:59:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730975667] [2023-11-28 23:59:47,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:59:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304839531] [2023-11-28 23:59:47,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304839531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:59:47,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:59:47,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-11-28 23:59:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122547142] [2023-11-28 23:59:47,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:59:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 23:59:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:59:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 23:59:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-28 23:59:47,241 INFO L87 Difference]: Start difference. First operand 30084 states and 43053 transitions. Second operand has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 21 states have internal predecessors, (282), 4 states have call successors, (125), 3 states have call predecessors, (125), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-28 23:59:57,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:00,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:09,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:18,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:20,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:25,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:28,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:33,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 00:00:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:44,107 INFO L93 Difference]: Finished difference Result 86499 states and 124419 transitions. [2023-11-29 00:00:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:00:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 21 states have internal predecessors, (282), 4 states have call successors, (125), 3 states have call predecessors, (125), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) Word has length 461 [2023-11-29 00:00:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:44,170 INFO L225 Difference]: With dead ends: 86499 [2023-11-29 00:00:44,170 INFO L226 Difference]: Without dead ends: 57239 [2023-11-29 00:00:44,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 904 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=952, Invalid=2954, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 00:00:44,191 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 2400 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 824 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 3598 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:44,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2401 Valid, 3598 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 2063 Invalid, 4 Unknown, 0 Unchecked, 41.6s Time] [2023-11-29 00:00:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57239 states. [2023-11-29 00:00:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57239 to 34093. [2023-11-29 00:00:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34093 states, 30997 states have (on average 1.41581443365487) internal successors, (43886), 31017 states have internal predecessors, (43886), 2583 states have call successors, (2583), 512 states have call predecessors, (2583), 512 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-29 00:00:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34093 states to 34093 states and 49052 transitions. [2023-11-29 00:00:48,522 INFO L78 Accepts]: Start accepts. Automaton has 34093 states and 49052 transitions. Word has length 461 [2023-11-29 00:00:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:48,522 INFO L495 AbstractCegarLoop]: Abstraction has 34093 states and 49052 transitions. [2023-11-29 00:00:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 21 states have internal predecessors, (282), 4 states have call successors, (125), 3 states have call predecessors, (125), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-29 00:00:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34093 states and 49052 transitions. [2023-11-29 00:00:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 00:00:48,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:48,527 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:48,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 00:00:48,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 00:00:48,728 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:48,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 998509793, now seen corresponding path program 1 times [2023-11-29 00:00:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:48,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565298692] [2023-11-29 00:00:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:48,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:48,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:00:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452844937] [2023-11-29 00:00:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:48,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:48,776 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:48,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 00:00:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:49,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:00:49,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3956 proven. 87 refuted. 0 times theorem prover too weak. 3769 trivial. 0 not checked. [2023-11-29 00:00:52,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 99 proven. 87 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-29 00:00:58,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:58,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565298692] [2023-11-29 00:00:58,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:00:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452844937] [2023-11-29 00:00:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452844937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:58,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:00:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-29 00:00:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160597829] [2023-11-29 00:00:58,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:58,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:00:58,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:00:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:00:58,193 INFO L87 Difference]: Start difference. First operand 34093 states and 49052 transitions. Second operand has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-29 00:01:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:01:12,853 INFO L93 Difference]: Finished difference Result 101475 states and 149528 transitions. [2023-11-29 00:01:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 00:01:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) Word has length 461 [2023-11-29 00:01:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:01:12,924 INFO L225 Difference]: With dead ends: 101475 [2023-11-29 00:01:12,924 INFO L226 Difference]: Without dead ends: 68231 [2023-11-29 00:01:12,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1245, Invalid=4011, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:01:12,948 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 4090 mSDsluCounter, 6614 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4151 SdHoareTripleChecker+Valid, 7053 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:01:12,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4151 Valid, 7053 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-29 00:01:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68231 states. [2023-11-29 00:01:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68231 to 36454. [2023-11-29 00:01:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36454 states, 33357 states have (on average 1.420121713583356) internal successors, (47371), 33377 states have internal predecessors, (47371), 2583 states have call successors, (2583), 513 states have call predecessors, (2583), 513 states have return successors, (2583), 2563 states have call predecessors, (2583), 2583 states have call successors, (2583) [2023-11-29 00:01:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36454 states to 36454 states and 52537 transitions. [2023-11-29 00:01:17,366 INFO L78 Accepts]: Start accepts. Automaton has 36454 states and 52537 transitions. Word has length 461 [2023-11-29 00:01:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:01:17,367 INFO L495 AbstractCegarLoop]: Abstraction has 36454 states and 52537 transitions. [2023-11-29 00:01:17,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 4 states have call successors, (126), 3 states have call predecessors, (126), 5 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-29 00:01:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36454 states and 52537 transitions. [2023-11-29 00:01:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 00:01:17,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:01:17,373 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:17,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 00:01:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 00:01:17,573 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:01:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1273269407, now seen corresponding path program 1 times [2023-11-29 00:01:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489206665] [2023-11-29 00:01:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:17,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:01:17,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56463030] [2023-11-29 00:01:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:17,629 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:17,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 00:01:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:18,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:01:18,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 2165 proven. 474 refuted. 0 times theorem prover too weak. 5173 trivial. 0 not checked. [2023-11-29 00:01:22,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489206665] [2023-11-29 00:01:44,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:01:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56463030] [2023-11-29 00:01:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56463030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:44,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:01:44,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-29 00:01:44,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388818024] [2023-11-29 00:01:44,579 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:44,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:01:44,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:01:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1332, Unknown=3, NotChecked=0, Total=1560 [2023-11-29 00:01:44,581 INFO L87 Difference]: Start difference. First operand 36454 states and 52537 transitions. Second operand has 26 states, 26 states have (on average 6.3076923076923075) internal successors, (164), 24 states have internal predecessors, (164), 4 states have call successors, (63), 4 states have call predecessors, (63), 6 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) [2023-11-29 00:01:56,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:01:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:01:59,115 INFO L93 Difference]: Finished difference Result 79612 states and 115126 transitions. [2023-11-29 00:01:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:01:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.3076923076923075) internal successors, (164), 24 states have internal predecessors, (164), 4 states have call successors, (63), 4 states have call predecessors, (63), 6 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) Word has length 461 [2023-11-29 00:01:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:01:59,158 INFO L225 Difference]: With dead ends: 79612 [2023-11-29 00:01:59,159 INFO L226 Difference]: Without dead ends: 45980 [2023-11-29 00:01:59,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1049, Invalid=4350, Unknown=3, NotChecked=0, Total=5402 [2023-11-29 00:01:59,184 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 4089 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 5030 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:01:59,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4089 Valid, 5030 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2822 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-11-29 00:01:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45980 states. [2023-11-29 00:02:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45980 to 38426. [2023-11-29 00:02:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38426 states, 35294 states have (on average 1.4218280727602426) internal successors, (50182), 35318 states have internal predecessors, (50182), 2599 states have call successors, (2599), 532 states have call predecessors, (2599), 532 states have return successors, (2599), 2575 states have call predecessors, (2599), 2599 states have call successors, (2599) [2023-11-29 00:02:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38426 states to 38426 states and 55380 transitions. [2023-11-29 00:02:03,513 INFO L78 Accepts]: Start accepts. Automaton has 38426 states and 55380 transitions. Word has length 461 [2023-11-29 00:02:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:03,514 INFO L495 AbstractCegarLoop]: Abstraction has 38426 states and 55380 transitions. [2023-11-29 00:02:03,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.3076923076923075) internal successors, (164), 24 states have internal predecessors, (164), 4 states have call successors, (63), 4 states have call predecessors, (63), 6 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) [2023-11-29 00:02:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 38426 states and 55380 transitions. [2023-11-29 00:02:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 00:02:03,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:03,521 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:03,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 00:02:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 00:02:03,723 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:03,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1696916129, now seen corresponding path program 1 times [2023-11-29 00:02:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859214886] [2023-11-29 00:02:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:03,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052811439] [2023-11-29 00:02:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:03,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:03,809 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:03,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 00:02:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:05,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:02:05,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 4094 proven. 435 refuted. 0 times theorem prover too weak. 3283 trivial. 0 not checked. [2023-11-29 00:02:09,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 105 proven. 444 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2023-11-29 00:02:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859214886] [2023-11-29 00:02:12,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052811439] [2023-11-29 00:02:12,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052811439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:12,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:12,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-11-29 00:02:12,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643358021] [2023-11-29 00:02:12,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:12,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 00:02:12,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:12,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 00:02:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:02:12,980 INFO L87 Difference]: Start difference. First operand 38426 states and 55380 transitions. Second operand has 30 states, 29 states have (on average 9.551724137931034) internal successors, (277), 28 states have internal predecessors, (277), 8 states have call successors, (126), 5 states have call predecessors, (126), 10 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-29 00:02:40,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:02:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:50,134 INFO L93 Difference]: Finished difference Result 163772 states and 243864 transitions. [2023-11-29 00:02:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 00:02:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 9.551724137931034) internal successors, (277), 28 states have internal predecessors, (277), 8 states have call successors, (126), 5 states have call predecessors, (126), 10 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) Word has length 461 [2023-11-29 00:02:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:50,265 INFO L225 Difference]: With dead ends: 163772 [2023-11-29 00:02:50,265 INFO L226 Difference]: Without dead ends: 127747 [2023-11-29 00:02:50,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2294, Invalid=5016, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 00:02:50,293 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 5688 mSDsluCounter, 8629 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 1108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5691 SdHoareTripleChecker+Valid, 9042 SdHoareTripleChecker+Invalid, 6304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:50,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5691 Valid, 9042 Invalid, 6304 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1108 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 21.1s Time] [2023-11-29 00:02:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127747 states. [2023-11-29 00:02:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127747 to 48898. [2023-11-29 00:02:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48898 states, 44527 states have (on average 1.4206436544119299) internal successors, (63257), 44562 states have internal predecessors, (63257), 3623 states have call successors, (3623), 747 states have call predecessors, (3623), 747 states have return successors, (3623), 3588 states have call predecessors, (3623), 3623 states have call successors, (3623) [2023-11-29 00:02:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48898 states to 48898 states and 70503 transitions. [2023-11-29 00:02:58,596 INFO L78 Accepts]: Start accepts. Automaton has 48898 states and 70503 transitions. Word has length 461 [2023-11-29 00:02:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:58,597 INFO L495 AbstractCegarLoop]: Abstraction has 48898 states and 70503 transitions. [2023-11-29 00:02:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 9.551724137931034) internal successors, (277), 28 states have internal predecessors, (277), 8 states have call successors, (126), 5 states have call predecessors, (126), 10 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-29 00:02:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48898 states and 70503 transitions. [2023-11-29 00:02:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 00:02:58,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:58,606 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:58,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-29 00:02:58,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:02:58,807 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:58,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash -669778465, now seen corresponding path program 1 times [2023-11-29 00:02:58,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:58,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461505340] [2023-11-29 00:02:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:58,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:58,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:58,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790084661] [2023-11-29 00:02:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:58,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:58,854 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 00:03:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:00,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:03:00,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 2003 proven. 747 refuted. 0 times theorem prover too weak. 5062 trivial. 0 not checked. [2023-11-29 00:03:04,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 48 proven. 678 refuted. 0 times theorem prover too weak. 7086 trivial. 0 not checked. [2023-11-29 00:03:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461505340] [2023-11-29 00:03:05,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790084661] [2023-11-29 00:03:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790084661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:05,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2023-11-29 00:03:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096215289] [2023-11-29 00:03:05,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:03:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:03:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:03:05,315 INFO L87 Difference]: Start difference. First operand 48898 states and 70503 transitions. Second operand has 38 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 12 states have call successors, (126), 7 states have call predecessors, (126), 12 states have return successors, (126), 8 states have call predecessors, (126), 12 states have call successors, (126) [2023-11-29 00:03:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:32,273 INFO L93 Difference]: Finished difference Result 175649 states and 256914 transitions. [2023-11-29 00:03:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:03:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 12 states have call successors, (126), 7 states have call predecessors, (126), 12 states have return successors, (126), 8 states have call predecessors, (126), 12 states have call successors, (126) Word has length 461 [2023-11-29 00:03:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:32,433 INFO L225 Difference]: With dead ends: 175649 [2023-11-29 00:03:32,433 INFO L226 Difference]: Without dead ends: 135088 [2023-11-29 00:03:32,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 888 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1897, Invalid=5413, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 00:03:32,475 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 3537 mSDsluCounter, 4864 mSDsCounter, 0 mSdLazyCounter, 3776 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 5146 SdHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 3776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:32,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 5146 Invalid, 4434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 3776 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-11-29 00:03:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135088 states. [2023-11-29 00:03:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135088 to 82214. [2023-11-29 00:03:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82214 states, 74654 states have (on average 1.414097034318322) internal successors, (105568), 74709 states have internal predecessors, (105568), 6143 states have call successors, (6143), 1416 states have call predecessors, (6143), 1416 states have return successors, (6143), 6088 states have call predecessors, (6143), 6143 states have call successors, (6143) [2023-11-29 00:03:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82214 states to 82214 states and 117854 transitions. [2023-11-29 00:03:47,224 INFO L78 Accepts]: Start accepts. Automaton has 82214 states and 117854 transitions. Word has length 461 [2023-11-29 00:03:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:47,225 INFO L495 AbstractCegarLoop]: Abstraction has 82214 states and 117854 transitions. [2023-11-29 00:03:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 12 states have call successors, (126), 7 states have call predecessors, (126), 12 states have return successors, (126), 8 states have call predecessors, (126), 12 states have call successors, (126) [2023-11-29 00:03:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 82214 states and 117854 transitions. [2023-11-29 00:03:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 00:03:47,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:47,234 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:47,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 00:03:47,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:03:47,435 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:47,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1191409955, now seen corresponding path program 1 times [2023-11-29 00:03:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:47,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545262503] [2023-11-29 00:03:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:47,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:47,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:47,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742302799] [2023-11-29 00:03:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:47,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:47,487 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:47,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d5ddafb-0a57-4d69-8fb0-a14f572982b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process