./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/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_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/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_5af1d537-96d7-4821-944f-75e9e994719b/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 ed0b1861101548b730fb063fdf9036ca893ba003f1a5026e39b1db8e4f4805e6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:17:26,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:17:26,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:17:26,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:17:26,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:17:26,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:17:26,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:17:26,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:17:26,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:17:26,822 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:17:26,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:17:26,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:17:26,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:17:26,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:17:26,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:17:26,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:17:26,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:17:26,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:17:26,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:17:26,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:17:26,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:17:26,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:17:26,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:17:26,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:17:26,831 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:17:26,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:17:26,832 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:17:26,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:17:26,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:17:26,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:17:26,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:17:26,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:17:26,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:17:26,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:17:26,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:17:26,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:17:26,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:17:26,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:17:26,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:17:26,836 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:17:26,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:17:26,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:17:26,837 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_5af1d537-96d7-4821-944f-75e9e994719b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed0b1861101548b730fb063fdf9036ca893ba003f1a5026e39b1db8e4f4805e6 [2023-11-29 00:17:27,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:17:27,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:17:27,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:17:27,120 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:17:27,120 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:17:27,122 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i [2023-11-29 00:17:29,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:17:30,116 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:17:30,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i [2023-11-29 00:17:30,133 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/data/9f961e035/daa1dacddd5b418281f329aa4632da93/FLAG578fd9f52 [2023-11-29 00:17:30,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/data/9f961e035/daa1dacddd5b418281f329aa4632da93 [2023-11-29 00:17:30,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:17:30,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:17:30,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:17:30,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:17:30,175 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:17:30,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1610cf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30, skipping insertion in model container [2023-11-29 00:17:30,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,264 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:17:30,392 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_5af1d537-96d7-4821-944f-75e9e994719b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i[916,929] [2023-11-29 00:17:30,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:17:30,639 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:17:30,652 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_5af1d537-96d7-4821-944f-75e9e994719b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-23.i[916,929] [2023-11-29 00:17:30,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:17:30,797 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:17:30,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30 WrapperNode [2023-11-29 00:17:30,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:17:30,798 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:17:30,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:17:30,799 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:17:30,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,918 INFO L138 Inliner]: procedures = 26, calls = 90, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 748 [2023-11-29 00:17:30,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:17:30,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:17:30,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:17:30,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:17:30,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,944 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,990 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:17:30,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:30,991 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,029 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:17:31,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:17:31,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:17:31,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:17:31,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (1/1) ... [2023-11-29 00:17:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:17:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:31,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:17:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:17:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:17:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:17:31,176 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:17:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:17:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:17:31,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:17:31,317 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:17:31,320 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:17:32,448 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:17:32,527 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:17:32,528 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:17:32,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:17:32 BoogieIcfgContainer [2023-11-29 00:17:32,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:17:32,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:17:32,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:17:32,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:17:32,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:17:30" (1/3) ... [2023-11-29 00:17:32,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d80bcda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:17:32, skipping insertion in model container [2023-11-29 00:17:32,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:17:30" (2/3) ... [2023-11-29 00:17:32,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d80bcda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:17:32, skipping insertion in model container [2023-11-29 00:17:32,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:17:32" (3/3) ... [2023-11-29 00:17:32,539 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-23.i [2023-11-29 00:17:32,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:17:32,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:17:32,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:17:32,629 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;@708959b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:17:32,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:17:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 206 states have (on average 1.5825242718446602) internal successors, (326), 207 states have internal predecessors, (326), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:17:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:32,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:32,671 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:32,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1198472077, now seen corresponding path program 1 times [2023-11-29 00:17:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188375392] [2023-11-29 00:17:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188375392] [2023-11-29 00:17:33,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:17:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011076021] [2023-11-29 00:17:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:33,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:33,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:33,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:17:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:33,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:17:33,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2023-11-29 00:17:33,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011076021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:33,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:17:33,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647918922] [2023-11-29 00:17:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:33,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:17:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:17:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:17:33,691 INFO L87 Difference]: Start difference. First operand has 286 states, 206 states have (on average 1.5825242718446602) internal successors, (326), 207 states have internal predecessors, (326), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:17:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:33,778 INFO L93 Difference]: Finished difference Result 569 states and 1035 transitions. [2023-11-29 00:17:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:17:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) Word has length 526 [2023-11-29 00:17:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:33,796 INFO L225 Difference]: With dead ends: 569 [2023-11-29 00:17:33,796 INFO L226 Difference]: Without dead ends: 284 [2023-11-29 00:17:33,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:17:33,808 INFO L413 NwaCegarLoop]: 470 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, 470 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:33,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 470 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:17:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-29 00:17:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-11-29 00:17:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 205 states have (on average 1.5560975609756098) internal successors, (319), 205 states have internal predecessors, (319), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:17:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 473 transitions. [2023-11-29 00:17:33,893 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 473 transitions. Word has length 526 [2023-11-29 00:17:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:33,894 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 473 transitions. [2023-11-29 00:17:33,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:17:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 473 transitions. [2023-11-29 00:17:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:33,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:33,911 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:33,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:17:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:17:34,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:34,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:34,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1305397979, now seen corresponding path program 1 times [2023-11-29 00:17:34,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:34,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415354007] [2023-11-29 00:17:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:34,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:34,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542085587] [2023-11-29 00:17:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:34,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:34,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:34,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:17:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:34,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:17:34,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 1168 proven. 0 refuted. 0 times theorem prover too weak. 10536 trivial. 0 not checked. [2023-11-29 00:17:35,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:35,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415354007] [2023-11-29 00:17:35,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542085587] [2023-11-29 00:17:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542085587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:35,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:35,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:17:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100823857] [2023-11-29 00:17:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:35,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:17:35,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:17:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:17:35,578 INFO L87 Difference]: Start difference. First operand 284 states and 473 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:17:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:36,061 INFO L93 Difference]: Finished difference Result 566 states and 943 transitions. [2023-11-29 00:17:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:17:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 526 [2023-11-29 00:17:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:36,069 INFO L225 Difference]: With dead ends: 566 [2023-11-29 00:17:36,070 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:17:36,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:17:36,075 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 492 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:36,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 510 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:17:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:17:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2023-11-29 00:17:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 204 states have (on average 1.5490196078431373) internal successors, (316), 204 states have internal predecessors, (316), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-29 00:17:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 470 transitions. [2023-11-29 00:17:36,116 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 470 transitions. Word has length 526 [2023-11-29 00:17:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:36,119 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 470 transitions. [2023-11-29 00:17:36,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-29 00:17:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 470 transitions. [2023-11-29 00:17:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:36,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:36,130 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:36,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:17:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:36,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:36,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1478167133, now seen corresponding path program 1 times [2023-11-29 00:17:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:36,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120876086] [2023-11-29 00:17:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:36,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:36,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025238131] [2023-11-29 00:17:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:36,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:36,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:36,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:17:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:36,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:17:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:36,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:36,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120876086] [2023-11-29 00:17:36,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025238131] [2023-11-29 00:17:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025238131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:17:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325978606] [2023-11-29 00:17:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:36,964 INFO L87 Difference]: Start difference. First operand 283 states and 470 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:37,074 INFO L93 Difference]: Finished difference Result 847 states and 1408 transitions. [2023-11-29 00:17:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 526 [2023-11-29 00:17:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:37,083 INFO L225 Difference]: With dead ends: 847 [2023-11-29 00:17:37,083 INFO L226 Difference]: Without dead ends: 565 [2023-11-29 00:17:37,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:37,086 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 461 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:37,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 920 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:17:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-11-29 00:17:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2023-11-29 00:17:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 406 states have (on average 1.5443349753694582) internal successors, (627), 406 states have internal predecessors, (627), 154 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 935 transitions. [2023-11-29 00:17:37,184 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 935 transitions. Word has length 526 [2023-11-29 00:17:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:37,186 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 935 transitions. [2023-11-29 00:17:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 935 transitions. [2023-11-29 00:17:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:37,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:37,193 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:37,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:17:37,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:37,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:37,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 602148127, now seen corresponding path program 1 times [2023-11-29 00:17:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:37,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735755616] [2023-11-29 00:17:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:37,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:37,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084477932] [2023-11-29 00:17:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:37,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:37,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:17:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:37,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:17:37,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:37,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735755616] [2023-11-29 00:17:37,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084477932] [2023-11-29 00:17:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084477932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:37,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:17:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628364992] [2023-11-29 00:17:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:37,968 INFO L87 Difference]: Start difference. First operand 563 states and 935 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:38,131 INFO L93 Difference]: Finished difference Result 1422 states and 2363 transitions. [2023-11-29 00:17:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 526 [2023-11-29 00:17:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:38,140 INFO L225 Difference]: With dead ends: 1422 [2023-11-29 00:17:38,141 INFO L226 Difference]: Without dead ends: 860 [2023-11-29 00:17:38,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:38,144 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 463 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:38,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 948 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:17:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-29 00:17:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 605. [2023-11-29 00:17:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 448 states have (on average 1.5558035714285714) internal successors, (697), 448 states have internal predecessors, (697), 154 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1005 transitions. [2023-11-29 00:17:38,222 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1005 transitions. Word has length 526 [2023-11-29 00:17:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:38,223 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1005 transitions. [2023-11-29 00:17:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1005 transitions. [2023-11-29 00:17:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:38,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:38,230 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:38,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:17:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:38,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1023592993, now seen corresponding path program 1 times [2023-11-29 00:17:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156459240] [2023-11-29 00:17:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:38,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:38,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735827070] [2023-11-29 00:17:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:38,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:38,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:38,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:17:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:38,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:17:38,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:39,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:39,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156459240] [2023-11-29 00:17:39,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:39,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735827070] [2023-11-29 00:17:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735827070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:39,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:39,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:17:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497297980] [2023-11-29 00:17:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:39,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:39,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:39,044 INFO L87 Difference]: Start difference. First operand 605 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:39,204 INFO L93 Difference]: Finished difference Result 1799 states and 2988 transitions. [2023-11-29 00:17:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 526 [2023-11-29 00:17:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:39,216 INFO L225 Difference]: With dead ends: 1799 [2023-11-29 00:17:39,216 INFO L226 Difference]: Without dead ends: 1195 [2023-11-29 00:17:39,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:39,220 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 448 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:39,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1324 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:17:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-11-29 00:17:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 787. [2023-11-29 00:17:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 630 states have (on average 1.5952380952380953) internal successors, (1005), 630 states have internal predecessors, (1005), 154 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1313 transitions. [2023-11-29 00:17:39,375 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1313 transitions. Word has length 526 [2023-11-29 00:17:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:39,377 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1313 transitions. [2023-11-29 00:17:39,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1313 transitions. [2023-11-29 00:17:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:17:39,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:39,383 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:39,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:17:39,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:39,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:39,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash 363192417, now seen corresponding path program 1 times [2023-11-29 00:17:39,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:39,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210529324] [2023-11-29 00:17:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:39,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:39,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081073977] [2023-11-29 00:17:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:39,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:39,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:39,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:17:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:40,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:17:40,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5898 proven. 105 refuted. 0 times theorem prover too weak. 5701 trivial. 0 not checked. [2023-11-29 00:17:40,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 123 proven. 105 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:17:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210529324] [2023-11-29 00:17:40,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081073977] [2023-11-29 00:17:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081073977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:40,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:40,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 00:17:40,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245972632] [2023-11-29 00:17:40,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:17:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:17:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:17:40,989 INFO L87 Difference]: Start difference. First operand 787 states and 1313 transitions. Second operand has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2023-11-29 00:17:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:41,637 INFO L93 Difference]: Finished difference Result 1585 states and 2635 transitions. [2023-11-29 00:17:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:17:41,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) Word has length 526 [2023-11-29 00:17:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:41,644 INFO L225 Difference]: With dead ends: 1585 [2023-11-29 00:17:41,644 INFO L226 Difference]: Without dead ends: 799 [2023-11-29 00:17:41,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:17:41,647 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 290 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:41,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 938 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:17:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-29 00:17:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2023-11-29 00:17:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 636 states have (on average 1.5770440251572326) internal successors, (1003), 636 states have internal predecessors, (1003), 154 states have call successors, (154), 4 states have call predecessors, (154), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1311 transitions. [2023-11-29 00:17:41,723 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1311 transitions. Word has length 526 [2023-11-29 00:17:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:41,724 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1311 transitions. [2023-11-29 00:17:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2023-11-29 00:17:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1311 transitions. [2023-11-29 00:17:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:17:41,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:41,729 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:41,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:17:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:17:41,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:41,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 781823284, now seen corresponding path program 1 times [2023-11-29 00:17:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132545038] [2023-11-29 00:17:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:42,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:42,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973053037] [2023-11-29 00:17:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:42,012 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:42,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:17:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:42,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:17:42,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5838 proven. 99 refuted. 0 times theorem prover too weak. 5767 trivial. 0 not checked. [2023-11-29 00:17:42,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:17:43,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132545038] [2023-11-29 00:17:43,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973053037] [2023-11-29 00:17:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973053037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:43,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 00:17:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354350453] [2023-11-29 00:17:43,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:17:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:17:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:17:43,172 INFO L87 Difference]: Start difference. First operand 795 states and 1311 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-11-29 00:17:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:43,699 INFO L93 Difference]: Finished difference Result 1601 states and 2631 transitions. [2023-11-29 00:17:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:17:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) Word has length 527 [2023-11-29 00:17:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:43,708 INFO L225 Difference]: With dead ends: 1601 [2023-11-29 00:17:43,708 INFO L226 Difference]: Without dead ends: 807 [2023-11-29 00:17:43,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:17:43,712 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 286 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:43,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 970 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:17:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-11-29 00:17:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 803. [2023-11-29 00:17:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 642 states have (on average 1.5623052959501558) internal successors, (1003), 642 states have internal predecessors, (1003), 154 states have call successors, (154), 6 states have call predecessors, (154), 6 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1311 transitions. [2023-11-29 00:17:43,815 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1311 transitions. Word has length 527 [2023-11-29 00:17:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:43,817 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1311 transitions. [2023-11-29 00:17:43,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-11-29 00:17:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1311 transitions. [2023-11-29 00:17:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:17:43,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:43,823 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:43,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:17:44,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:17:44,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:44,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1704093367, now seen corresponding path program 1 times [2023-11-29 00:17:44,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607196280] [2023-11-29 00:17:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:44,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:44,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:44,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575329733] [2023-11-29 00:17:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:44,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:44,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:44,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:17:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:44,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:17:44,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5928 proven. 114 refuted. 0 times theorem prover too weak. 5662 trivial. 0 not checked. [2023-11-29 00:17:44,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 114 proven. 114 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:17:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607196280] [2023-11-29 00:17:45,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575329733] [2023-11-29 00:17:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575329733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:45,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:45,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:17:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253085260] [2023-11-29 00:17:45,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:45,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:17:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:17:45,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:17:45,161 INFO L87 Difference]: Start difference. First operand 803 states and 1311 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-29 00:17:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:45,732 INFO L93 Difference]: Finished difference Result 1621 states and 2635 transitions. [2023-11-29 00:17:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:17:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 528 [2023-11-29 00:17:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:45,741 INFO L225 Difference]: With dead ends: 1621 [2023-11-29 00:17:45,741 INFO L226 Difference]: Without dead ends: 819 [2023-11-29 00:17:45,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1048 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:17:45,745 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 881 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:45,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 982 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:17:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-11-29 00:17:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 811. [2023-11-29 00:17:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 648 states have (on average 1.5540123456790123) internal successors, (1007), 648 states have internal predecessors, (1007), 154 states have call successors, (154), 8 states have call predecessors, (154), 8 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1315 transitions. [2023-11-29 00:17:45,866 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1315 transitions. Word has length 528 [2023-11-29 00:17:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:45,867 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1315 transitions. [2023-11-29 00:17:45,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-29 00:17:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1315 transitions. [2023-11-29 00:17:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:17:45,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:45,873 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:45,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 00:17:46,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:46,074 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:46,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1675593077, now seen corresponding path program 1 times [2023-11-29 00:17:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:46,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595199299] [2023-11-29 00:17:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:46,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:46,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283219666] [2023-11-29 00:17:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:46,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:46,151 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:46,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:17:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:46,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:17:46,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5718 proven. 135 refuted. 0 times theorem prover too weak. 5851 trivial. 0 not checked. [2023-11-29 00:17:47,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 93 proven. 135 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:17:47,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595199299] [2023-11-29 00:17:47,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283219666] [2023-11-29 00:17:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283219666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:47,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:47,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:17:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248542956] [2023-11-29 00:17:47,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:17:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:17:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:17:47,339 INFO L87 Difference]: Start difference. First operand 811 states and 1315 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-29 00:17:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:47,952 INFO L93 Difference]: Finished difference Result 1637 states and 2639 transitions. [2023-11-29 00:17:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:17:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) Word has length 528 [2023-11-29 00:17:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:47,960 INFO L225 Difference]: With dead ends: 1637 [2023-11-29 00:17:47,960 INFO L226 Difference]: Without dead ends: 827 [2023-11-29 00:17:47,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1048 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:17:47,964 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 800 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:47,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 943 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:17:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-11-29 00:17:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 815. [2023-11-29 00:17:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 650 states have (on average 1.5369230769230768) internal successors, (999), 650 states have internal predecessors, (999), 154 states have call successors, (154), 10 states have call predecessors, (154), 10 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-29 00:17:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1307 transitions. [2023-11-29 00:17:48,088 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1307 transitions. Word has length 528 [2023-11-29 00:17:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:48,089 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 1307 transitions. [2023-11-29 00:17:48,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-29 00:17:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1307 transitions. [2023-11-29 00:17:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:17:48,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:48,096 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:48,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:17:48,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:48,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:48,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash -401743821, now seen corresponding path program 1 times [2023-11-29 00:17:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:48,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115531000] [2023-11-29 00:17:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:48,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:48,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036341342] [2023-11-29 00:17:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:48,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:48,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:48,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:17:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:48,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:17:48,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:49,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115531000] [2023-11-29 00:17:49,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036341342] [2023-11-29 00:17:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036341342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:49,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:17:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731217092] [2023-11-29 00:17:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:17:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:17:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:17:49,351 INFO L87 Difference]: Start difference. First operand 815 states and 1307 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:49,835 INFO L93 Difference]: Finished difference Result 2287 states and 3678 transitions. [2023-11-29 00:17:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:17:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 528 [2023-11-29 00:17:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:49,847 INFO L225 Difference]: With dead ends: 2287 [2023-11-29 00:17:49,847 INFO L226 Difference]: Without dead ends: 1450 [2023-11-29 00:17:49,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:17:49,851 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 698 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 2278 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:17:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2023-11-29 00:17:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 968. [2023-11-29 00:17:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 721 states have (on average 1.49375866851595) internal successors, (1077), 721 states have internal predecessors, (1077), 231 states have call successors, (231), 15 states have call predecessors, (231), 15 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2023-11-29 00:17:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1539 transitions. [2023-11-29 00:17:50,031 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1539 transitions. Word has length 528 [2023-11-29 00:17:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:50,032 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1539 transitions. [2023-11-29 00:17:50,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1539 transitions. [2023-11-29 00:17:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:17:50,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:50,038 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:50,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:17:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:17:50,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:50,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1082565251, now seen corresponding path program 1 times [2023-11-29 00:17:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:50,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632020603] [2023-11-29 00:17:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:50,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564241097] [2023-11-29 00:17:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:50,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:50,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:50,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:17:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:50,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:17:50,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:50,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:50,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632020603] [2023-11-29 00:17:50,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564241097] [2023-11-29 00:17:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564241097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:50,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:17:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601425840] [2023-11-29 00:17:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:50,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:50,858 INFO L87 Difference]: Start difference. First operand 968 states and 1539 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:51,003 INFO L93 Difference]: Finished difference Result 2382 states and 3827 transitions. [2023-11-29 00:17:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 529 [2023-11-29 00:17:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:51,014 INFO L225 Difference]: With dead ends: 2382 [2023-11-29 00:17:51,014 INFO L226 Difference]: Without dead ends: 1568 [2023-11-29 00:17:51,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:51,018 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 303 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:51,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:17:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-11-29 00:17:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1564. [2023-11-29 00:17:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1259 states have (on average 1.5424940428911835) internal successors, (1942), 1261 states have internal predecessors, (1942), 287 states have call successors, (287), 17 states have call predecessors, (287), 17 states have return successors, (287), 285 states have call predecessors, (287), 287 states have call successors, (287) [2023-11-29 00:17:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2516 transitions. [2023-11-29 00:17:51,181 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2516 transitions. Word has length 529 [2023-11-29 00:17:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:51,182 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2516 transitions. [2023-11-29 00:17:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2516 transitions. [2023-11-29 00:17:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:17:51,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:51,188 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:51,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:17:51,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:51,388 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:51,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash 311831685, now seen corresponding path program 1 times [2023-11-29 00:17:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:51,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695841544] [2023-11-29 00:17:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:51,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:51,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143038493] [2023-11-29 00:17:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:51,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:51,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:17:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:51,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:17:51,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:17:52,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:17:52,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695841544] [2023-11-29 00:17:52,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143038493] [2023-11-29 00:17:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143038493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:52,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:52,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:17:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298128883] [2023-11-29 00:17:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:17:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:17:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:17:52,540 INFO L87 Difference]: Start difference. First operand 1564 states and 2516 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:54,171 INFO L93 Difference]: Finished difference Result 9301 states and 15148 transitions. [2023-11-29 00:17:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:17:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 529 [2023-11-29 00:17:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:54,207 INFO L225 Difference]: With dead ends: 9301 [2023-11-29 00:17:54,207 INFO L226 Difference]: Without dead ends: 7891 [2023-11-29 00:17:54,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:17:54,212 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 3453 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:54,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3389 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:17:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7891 states. [2023-11-29 00:17:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 4683. [2023-11-29 00:17:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 3814 states have (on average 1.5406397482957526) internal successors, (5876), 3824 states have internal predecessors, (5876), 823 states have call successors, (823), 45 states have call predecessors, (823), 45 states have return successors, (823), 813 states have call predecessors, (823), 823 states have call successors, (823) [2023-11-29 00:17:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 7522 transitions. [2023-11-29 00:17:54,882 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 7522 transitions. Word has length 529 [2023-11-29 00:17:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:54,883 INFO L495 AbstractCegarLoop]: Abstraction has 4683 states and 7522 transitions. [2023-11-29 00:17:54,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:17:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 7522 transitions. [2023-11-29 00:17:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:17:54,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:54,894 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:54,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:17:55,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:55,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:55,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -709236669, now seen corresponding path program 1 times [2023-11-29 00:17:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:55,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442980071] [2023-11-29 00:17:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:55,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:55,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:55,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489107813] [2023-11-29 00:17:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:55,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:55,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:55,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:17:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:55,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:17:55,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 4206 proven. 51 refuted. 0 times theorem prover too weak. 7447 trivial. 0 not checked. [2023-11-29 00:17:55,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:17:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442980071] [2023-11-29 00:17:56,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489107813] [2023-11-29 00:17:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489107813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:56,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:56,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:17:56,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402566139] [2023-11-29 00:17:56,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:56,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:17:56,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:17:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:17:56,177 INFO L87 Difference]: Start difference. First operand 4683 states and 7522 transitions. Second operand has 12 states, 12 states have (on average 20.583333333333332) internal successors, (247), 12 states have internal predecessors, (247), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-29 00:17:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:58,907 INFO L93 Difference]: Finished difference Result 15745 states and 24990 transitions. [2023-11-29 00:17:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:17:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.583333333333332) internal successors, (247), 12 states have internal predecessors, (247), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 529 [2023-11-29 00:17:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:58,972 INFO L225 Difference]: With dead ends: 15745 [2023-11-29 00:17:58,972 INFO L226 Difference]: Without dead ends: 11221 [2023-11-29 00:17:58,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1048 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:17:58,984 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 2173 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2234 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:58,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2234 Valid, 1706 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:17:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11221 states. [2023-11-29 00:17:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11221 to 7459. [2023-11-29 00:17:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 6583 states have (on average 1.5805863588029774) internal successors, (10405), 6593 states have internal predecessors, (10405), 823 states have call successors, (823), 52 states have call predecessors, (823), 52 states have return successors, (823), 813 states have call predecessors, (823), 823 states have call successors, (823) [2023-11-29 00:17:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 12051 transitions. [2023-11-29 00:17:59,754 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 12051 transitions. Word has length 529 [2023-11-29 00:17:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:59,755 INFO L495 AbstractCegarLoop]: Abstraction has 7459 states and 12051 transitions. [2023-11-29 00:17:59,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.583333333333332) internal successors, (247), 12 states have internal predecessors, (247), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-29 00:17:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 12051 transitions. [2023-11-29 00:17:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:17:59,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:59,769 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:59,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:17:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:17:59,970 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:59,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1526885119, now seen corresponding path program 1 times [2023-11-29 00:17:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:59,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413489356] [2023-11-29 00:17:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:59,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:00,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394256814] [2023-11-29 00:18:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:00,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:00,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:00,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:18:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:00,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:18:00,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 8233 proven. 375 refuted. 0 times theorem prover too weak. 3096 trivial. 0 not checked. [2023-11-29 00:18:02,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 291 proven. 384 refuted. 0 times theorem prover too weak. 11029 trivial. 0 not checked. [2023-11-29 00:18:03,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:03,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413489356] [2023-11-29 00:18:03,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:03,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394256814] [2023-11-29 00:18:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394256814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:18:03,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:18:03,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-29 00:18:03,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491368319] [2023-11-29 00:18:03,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:18:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:18:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:18:03,289 INFO L87 Difference]: Start difference. First operand 7459 states and 12051 transitions. Second operand has 26 states, 26 states have (on average 10.384615384615385) internal successors, (270), 26 states have internal predecessors, (270), 9 states have call successors, (150), 5 states have call predecessors, (150), 11 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) [2023-11-29 00:18:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:05,481 INFO L93 Difference]: Finished difference Result 15060 states and 24118 transitions. [2023-11-29 00:18:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:18:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 10.384615384615385) internal successors, (270), 26 states have internal predecessors, (270), 9 states have call successors, (150), 5 states have call predecessors, (150), 11 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) Word has length 529 [2023-11-29 00:18:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:05,499 INFO L225 Difference]: With dead ends: 15060 [2023-11-29 00:18:05,499 INFO L226 Difference]: Without dead ends: 7759 [2023-11-29 00:18:05,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=1170, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:18:05,509 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1349 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:05,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 1583 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:18:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2023-11-29 00:18:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7651. [2023-11-29 00:18:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 6727 states have (on average 1.5570090679351865) internal successors, (10474), 6737 states have internal predecessors, (10474), 823 states have call successors, (823), 100 states have call predecessors, (823), 100 states have return successors, (823), 813 states have call predecessors, (823), 823 states have call successors, (823) [2023-11-29 00:18:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 12120 transitions. [2023-11-29 00:18:06,042 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 12120 transitions. Word has length 529 [2023-11-29 00:18:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:06,042 INFO L495 AbstractCegarLoop]: Abstraction has 7651 states and 12120 transitions. [2023-11-29 00:18:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.384615384615385) internal successors, (270), 26 states have internal predecessors, (270), 9 states have call successors, (150), 5 states have call predecessors, (150), 11 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) [2023-11-29 00:18:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 12120 transitions. [2023-11-29 00:18:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:18:06,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:06,051 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:06,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:18:06,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:06,252 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:06,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1511366401, now seen corresponding path program 1 times [2023-11-29 00:18:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:06,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907094836] [2023-11-29 00:18:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:06,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:06,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599104317] [2023-11-29 00:18:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:06,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:18:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:06,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:18:06,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-29 00:18:07,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:18:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907094836] [2023-11-29 00:18:07,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599104317] [2023-11-29 00:18:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599104317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:07,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:18:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557339974] [2023-11-29 00:18:07,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:18:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:18:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:18:07,519 INFO L87 Difference]: Start difference. First operand 7651 states and 12120 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:18:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:08,987 INFO L93 Difference]: Finished difference Result 25919 states and 40875 transitions. [2023-11-29 00:18:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:18:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 529 [2023-11-29 00:18:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:09,014 INFO L225 Difference]: With dead ends: 25919 [2023-11-29 00:18:09,014 INFO L226 Difference]: Without dead ends: 18447 [2023-11-29 00:18:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:18:09,023 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 968 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:09,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 2296 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:18:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18447 states. [2023-11-29 00:18:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18447 to 16465. [2023-11-29 00:18:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16465 states, 14705 states have (on average 1.5559333560013602) internal successors, (22880), 14725 states have internal predecessors, (22880), 1569 states have call successors, (1569), 190 states have call predecessors, (1569), 190 states have return successors, (1569), 1549 states have call predecessors, (1569), 1569 states have call successors, (1569) [2023-11-29 00:18:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16465 states to 16465 states and 26018 transitions. [2023-11-29 00:18:10,219 INFO L78 Accepts]: Start accepts. Automaton has 16465 states and 26018 transitions. Word has length 529 [2023-11-29 00:18:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 16465 states and 26018 transitions. [2023-11-29 00:18:10,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-29 00:18:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 16465 states and 26018 transitions. [2023-11-29 00:18:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:18:10,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:10,229 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:10,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:18:10,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:10,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:10,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2093643537, now seen corresponding path program 1 times [2023-11-29 00:18:10,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:10,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208423959] [2023-11-29 00:18:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:10,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:10,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:10,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109977150] [2023-11-29 00:18:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:10,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:10,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:10,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:18:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:11,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 00:18:11,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 6507 proven. 393 refuted. 0 times theorem prover too weak. 4804 trivial. 0 not checked. [2023-11-29 00:18:12,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 480 proven. 195 refuted. 0 times theorem prover too weak. 11029 trivial. 0 not checked. [2023-11-29 00:18:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208423959] [2023-11-29 00:18:14,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109977150] [2023-11-29 00:18:14,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109977150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:18:14,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:18:14,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2023-11-29 00:18:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056685386] [2023-11-29 00:18:14,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:18:14,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:18:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:18:14,782 INFO L87 Difference]: Start difference. First operand 16465 states and 26018 transitions. Second operand has 32 states, 32 states have (on average 9.59375) internal successors, (307), 32 states have internal predecessors, (307), 8 states have call successors, (149), 5 states have call predecessors, (149), 12 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) [2023-11-29 00:18:20,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:18:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:47,029 INFO L93 Difference]: Finished difference Result 201915 states and 312188 transitions. [2023-11-29 00:18:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2023-11-29 00:18:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.59375) internal successors, (307), 32 states have internal predecessors, (307), 8 states have call successors, (149), 5 states have call predecessors, (149), 12 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) Word has length 530 [2023-11-29 00:18:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:47,433 INFO L225 Difference]: With dead ends: 201915 [2023-11-29 00:18:47,433 INFO L226 Difference]: Without dead ends: 185629 [2023-11-29 00:18:47,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24669 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=9973, Invalid=46909, Unknown=0, NotChecked=0, Total=56882 [2023-11-29 00:18:47,506 INFO L413 NwaCegarLoop]: 1016 mSDtfsCounter, 7112 mSDsluCounter, 10414 mSDsCounter, 0 mSdLazyCounter, 6610 mSolverCounterSat, 2895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7124 SdHoareTripleChecker+Valid, 11430 SdHoareTripleChecker+Invalid, 9505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2895 IncrementalHoareTripleChecker+Valid, 6610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:47,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7124 Valid, 11430 Invalid, 9505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2895 Valid, 6610 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2023-11-29 00:18:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185629 states. [2023-11-29 00:18:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185629 to 43819. [2023-11-29 00:18:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43819 states, 41334 states have (on average 1.5786035709101467) internal successors, (65250), 41386 states have internal predecessors, (65250), 2049 states have call successors, (2049), 435 states have call predecessors, (2049), 435 states have return successors, (2049), 1997 states have call predecessors, (2049), 2049 states have call successors, (2049) [2023-11-29 00:18:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43819 states to 43819 states and 69348 transitions. [2023-11-29 00:18:51,340 INFO L78 Accepts]: Start accepts. Automaton has 43819 states and 69348 transitions. Word has length 530 [2023-11-29 00:18:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:51,341 INFO L495 AbstractCegarLoop]: Abstraction has 43819 states and 69348 transitions. [2023-11-29 00:18:51,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.59375) internal successors, (307), 32 states have internal predecessors, (307), 8 states have call successors, (149), 5 states have call predecessors, (149), 12 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) [2023-11-29 00:18:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 43819 states and 69348 transitions. [2023-11-29 00:18:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:18:51,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:51,367 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:51,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:18:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:51,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:18:51,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2048915405, now seen corresponding path program 1 times [2023-11-29 00:18:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:51,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720811148] [2023-11-29 00:18:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:51,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:18:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494039937] [2023-11-29 00:18:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:51,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:51,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:51,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:18:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:52,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:18:52,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 1372 proven. 12 refuted. 0 times theorem prover too weak. 10320 trivial. 0 not checked. [2023-11-29 00:18:52,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:18:53,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:53,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720811148] [2023-11-29 00:18:53,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:18:53,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494039937] [2023-11-29 00:18:53,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494039937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:18:53,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:18:53,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-29 00:18:53,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689656023] [2023-11-29 00:18:53,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:18:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:18:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:18:53,077 INFO L87 Difference]: Start difference. First operand 43819 states and 69348 transitions. Second operand has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:19:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:19:07,886 INFO L93 Difference]: Finished difference Result 216134 states and 341957 transitions. [2023-11-29 00:19:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:19:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 530 [2023-11-29 00:19:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:19:08,131 INFO L225 Difference]: With dead ends: 216134 [2023-11-29 00:19:08,131 INFO L226 Difference]: Without dead ends: 172528 [2023-11-29 00:19:08,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1054 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1604, Invalid=5536, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:19:08,172 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 8242 mSDsluCounter, 7158 mSDsCounter, 0 mSdLazyCounter, 3905 mSolverCounterSat, 1479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8388 SdHoareTripleChecker+Valid, 7697 SdHoareTripleChecker+Invalid, 5384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1479 IncrementalHoareTripleChecker+Valid, 3905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:19:08,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8388 Valid, 7697 Invalid, 5384 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1479 Valid, 3905 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 00:19:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172528 states. [2023-11-29 00:19:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172528 to 79987. [2023-11-29 00:19:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79987 states, 74855 states have (on average 1.5635428495090509) internal successors, (117039), 74955 states have internal predecessors, (117039), 4169 states have call successors, (4169), 962 states have call predecessors, (4169), 962 states have return successors, (4169), 4069 states have call predecessors, (4169), 4169 states have call successors, (4169) [2023-11-29 00:19:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79987 states to 79987 states and 125377 transitions. [2023-11-29 00:19:13,691 INFO L78 Accepts]: Start accepts. Automaton has 79987 states and 125377 transitions. Word has length 530 [2023-11-29 00:19:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:19:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 79987 states and 125377 transitions. [2023-11-29 00:19:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.1875) internal successors, (227), 16 states have internal predecessors, (227), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-29 00:19:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 79987 states and 125377 transitions. [2023-11-29 00:19:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:19:13,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:19:13,711 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:19:13,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 00:19:13,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:19:13,911 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:19:13,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:19:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash -383760113, now seen corresponding path program 1 times [2023-11-29 00:19:13,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:19:13,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836592968] [2023-11-29 00:19:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:19:13,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:19:13,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:19:13,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151009516] [2023-11-29 00:19:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:19:13,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:19:13,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:19:13,969 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:19:13,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:19:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:19:14,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:19:14,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:19:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 4206 proven. 51 refuted. 0 times theorem prover too weak. 7447 trivial. 0 not checked. [2023-11-29 00:19:14,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:19:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-29 00:19:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:19:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836592968] [2023-11-29 00:19:15,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:19:15,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151009516] [2023-11-29 00:19:15,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151009516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:19:15,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:19:15,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 00:19:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227138446] [2023-11-29 00:19:15,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:19:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:19:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:19:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:19:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:19:15,197 INFO L87 Difference]: Start difference. First operand 79987 states and 125377 transitions. Second operand has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-29 00:20:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:04,796 INFO L93 Difference]: Finished difference Result 588199 states and 905629 transitions. [2023-11-29 00:20:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:20:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 530 [2023-11-29 00:20:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:05,838 INFO L225 Difference]: With dead ends: 588199 [2023-11-29 00:20:05,838 INFO L226 Difference]: Without dead ends: 508437 [2023-11-29 00:20:05,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1117 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=963, Invalid=2819, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 00:20:05,927 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 1936 mSDsluCounter, 3876 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 1162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 4797 SdHoareTripleChecker+Invalid, 4395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:05,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 4797 Invalid, 4395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 00:20:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508437 states. [2023-11-29 00:20:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508437 to 93131. [2023-11-29 00:20:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93131 states, 87999 states have (on average 1.571961045011875) internal successors, (138331), 88099 states have internal predecessors, (138331), 4169 states have call successors, (4169), 962 states have call predecessors, (4169), 962 states have return successors, (4169), 4069 states have call predecessors, (4169), 4169 states have call successors, (4169) [2023-11-29 00:20:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93131 states to 93131 states and 146669 transitions. [2023-11-29 00:20:15,005 INFO L78 Accepts]: Start accepts. Automaton has 93131 states and 146669 transitions. Word has length 530 [2023-11-29 00:20:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:15,005 INFO L495 AbstractCegarLoop]: Abstraction has 93131 states and 146669 transitions. [2023-11-29 00:20:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-29 00:20:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 93131 states and 146669 transitions. [2023-11-29 00:20:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:20:15,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:15,025 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:15,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:20:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:15,226 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:15,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1917062477, now seen corresponding path program 1 times [2023-11-29 00:20:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:15,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077766740] [2023-11-29 00:20:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:15,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:15,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:15,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798316573] [2023-11-29 00:20:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:15,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:15,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:15,279 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:15,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:20:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:16,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:20:16,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 6528 proven. 1074 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2023-11-29 00:20:22,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077766740] [2023-11-29 00:20:32,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798316573] [2023-11-29 00:20:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798316573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:20:32,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:20:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-11-29 00:20:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251742098] [2023-11-29 00:20:32,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 00:20:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 00:20:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1440, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:20:32,863 INFO L87 Difference]: Start difference. First operand 93131 states and 146669 transitions. Second operand has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 28 states have internal predecessors, (187), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 9 states have call predecessors, (77), 10 states have call successors, (77) [2023-11-29 00:20:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:43,053 INFO L93 Difference]: Finished difference Result 223403 states and 350805 transitions. [2023-11-29 00:20:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:20:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 28 states have internal predecessors, (187), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 9 states have call predecessors, (77), 10 states have call successors, (77) Word has length 530 [2023-11-29 00:20:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:43,191 INFO L225 Difference]: With dead ends: 223403 [2023-11-29 00:20:43,191 INFO L226 Difference]: Without dead ends: 130497 [2023-11-29 00:20:43,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 00:20:43,226 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 2064 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:43,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2064 Valid, 2181 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 00:20:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130497 states. [2023-11-29 00:20:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130497 to 69715. [2023-11-29 00:20:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69715 states, 65904 states have (on average 1.5642146151978635) internal successors, (103088), 65944 states have internal predecessors, (103088), 2897 states have call successors, (2897), 913 states have call predecessors, (2897), 913 states have return successors, (2897), 2857 states have call predecessors, (2897), 2897 states have call successors, (2897) [2023-11-29 00:20:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69715 states to 69715 states and 108882 transitions. [2023-11-29 00:20:48,361 INFO L78 Accepts]: Start accepts. Automaton has 69715 states and 108882 transitions. Word has length 530 [2023-11-29 00:20:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:48,362 INFO L495 AbstractCegarLoop]: Abstraction has 69715 states and 108882 transitions. [2023-11-29 00:20:48,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 28 states have internal predecessors, (187), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 9 states have call predecessors, (77), 10 states have call successors, (77) [2023-11-29 00:20:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 69715 states and 108882 transitions. [2023-11-29 00:20:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:20:48,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:48,372 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:48,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:20:48,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:48,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:48,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1256391223, now seen corresponding path program 1 times [2023-11-29 00:20:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769493341] [2023-11-29 00:20:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:48,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:48,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669171988] [2023-11-29 00:20:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:48,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:48,643 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:22:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:04,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 00:22:04,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:32,362 WARN L293 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 67 DAG size of output: 31 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:22:49,730 WARN L293 SmtUtils]: Spent 9.10s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:23:22,593 WARN L293 SmtUtils]: Spent 15.06s on a formula simplification. DAG size of input: 107 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:23:34,775 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:23:47,377 WARN L293 SmtUtils]: Spent 12.36s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:23:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 8669 proven. 1593 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-11-29 00:23:56,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769493341] [2023-11-29 00:24:25,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669171988] [2023-11-29 00:24:25,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669171988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:25,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2023-11-29 00:24:25,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915638206] [2023-11-29 00:24:25,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:25,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 00:24:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 00:24:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=4046, Unknown=3, NotChecked=0, Total=4830 [2023-11-29 00:24:25,585 INFO L87 Difference]: Start difference. First operand 69715 states and 108882 transitions. Second operand has 56 states, 56 states have (on average 3.6607142857142856) internal successors, (205), 50 states have internal predecessors, (205), 14 states have call successors, (77), 14 states have call predecessors, (77), 20 states have return successors, (77), 14 states have call predecessors, (77), 14 states have call successors, (77) [2023-11-29 00:24:49,090 WARN L293 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 127 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:25:10,841 WARN L293 SmtUtils]: Spent 12.37s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:25:30,311 WARN L293 SmtUtils]: Spent 12.61s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:25:47,642 WARN L293 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:26:06,106 WARN L293 SmtUtils]: Spent 12.33s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:26:19,613 WARN L293 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 107 DAG size of output: 104 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:26:36,020 WARN L293 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 131 DAG size of output: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:26:52,465 WARN L293 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:27:14,619 WARN L293 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 123 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:27:42,676 WARN L293 SmtUtils]: Spent 12.25s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:28:37,414 WARN L293 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 113 DAG size of output: 110 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:28:56,097 WARN L293 SmtUtils]: Spent 12.29s on a formula simplification. DAG size of input: 117 DAG size of output: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:18,902 WARN L293 SmtUtils]: Spent 12.32s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:43,514 WARN L293 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:49,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:29:52,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:29:59,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:00,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:15,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:21,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:25,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:30:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:30:32,383 INFO L93 Difference]: Finished difference Result 254044 states and 397876 transitions. [2023-11-29 00:30:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-11-29 00:30:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.6607142857142856) internal successors, (205), 50 states have internal predecessors, (205), 14 states have call successors, (77), 14 states have call predecessors, (77), 20 states have return successors, (77), 14 states have call predecessors, (77), 14 states have call successors, (77) Word has length 530 [2023-11-29 00:30:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:30:32,575 INFO L225 Difference]: With dead ends: 254044 [2023-11-29 00:30:32,575 INFO L226 Difference]: Without dead ends: 184582 [2023-11-29 00:30:32,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11723 ImplicationChecksByTransitivity, 363.2s TimeCoverageRelationStatistics Valid=5544, Invalid=30346, Unknown=20, NotChecked=0, Total=35910 [2023-11-29 00:30:32,614 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 20247 mSDsluCounter, 6080 mSDsCounter, 0 mSdLazyCounter, 6488 mSolverCounterSat, 766 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20247 SdHoareTripleChecker+Valid, 6440 SdHoareTripleChecker+Invalid, 7258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 6488 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:30:32,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20247 Valid, 6440 Invalid, 7258 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [766 Valid, 6488 Invalid, 4 Unknown, 0 Unchecked, 49.4s Time] [2023-11-29 00:30:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184582 states. [2023-11-29 00:30:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184582 to 77170. [2023-11-29 00:30:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77170 states, 73354 states have (on average 1.56122365515173) internal successors, (114522), 73394 states have internal predecessors, (114522), 2897 states have call successors, (2897), 918 states have call predecessors, (2897), 918 states have return successors, (2897), 2857 states have call predecessors, (2897), 2897 states have call successors, (2897) [2023-11-29 00:30:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77170 states to 77170 states and 120316 transitions. [2023-11-29 00:30:38,269 INFO L78 Accepts]: Start accepts. Automaton has 77170 states and 120316 transitions. Word has length 530 [2023-11-29 00:30:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:30:38,269 INFO L495 AbstractCegarLoop]: Abstraction has 77170 states and 120316 transitions. [2023-11-29 00:30:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.6607142857142856) internal successors, (205), 50 states have internal predecessors, (205), 14 states have call successors, (77), 14 states have call predecessors, (77), 20 states have return successors, (77), 14 states have call predecessors, (77), 14 states have call successors, (77) [2023-11-29 00:30:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 77170 states and 120316 transitions. [2023-11-29 00:30:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:30:38,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:30:38,286 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:30:38,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:30:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:30:38,487 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:30:38,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:30:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 794592775, now seen corresponding path program 1 times [2023-11-29 00:30:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:30:38,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252890681] [2023-11-29 00:30:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:30:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:30:38,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:30:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6789981] [2023-11-29 00:30:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:30:38,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:30:38,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:30:38,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:30:38,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af1d537-96d7-4821-944f-75e9e994719b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:30:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:30:40,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:30:40,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:30:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7671 proven. 900 refuted. 0 times theorem prover too weak. 3133 trivial. 0 not checked. [2023-11-29 00:30:50,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:30:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:30:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252890681] [2023-11-29 00:30:53,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:30:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6789981] [2023-11-29 00:30:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6789981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:30:53,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:30:53,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-29 00:30:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66127457] [2023-11-29 00:30:53,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:30:53,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:30:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:30:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:30:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:30:53,988 INFO L87 Difference]: Start difference. First operand 77170 states and 120316 transitions. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 25 states have internal predecessors, (181), 9 states have call successors, (77), 9 states have call predecessors, (77), 12 states have return successors, (77), 8 states have call predecessors, (77), 9 states have call successors, (77) [2023-11-29 00:31:01,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:31:08,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:31:19,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:31:23,330 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 [0]