./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/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 ef5fa028017d876074069fbbea93055df8f895424627b4673992e11de8e7d01a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:25:51,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:25:51,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:25:51,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:25:51,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:25:51,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:25:51,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:25:51,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:25:51,530 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:25:51,531 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:25:51,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:25:51,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:25:51,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:25:51,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:25:51,533 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:25:51,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:25:51,534 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:25:51,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:25:51,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:25:51,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:25:51,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:25:51,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:25:51,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:25:51,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:25:51,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:25:51,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:25:51,540 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:25:51,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:25:51,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:25:51,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:25:51,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:25:51,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:25:51,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:25:51,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:25:51,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:25:51,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:25:51,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:25:51,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:25:51,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:25:51,545 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:25:51,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:25:51,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:25:51,546 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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef5fa028017d876074069fbbea93055df8f895424627b4673992e11de8e7d01a [2023-11-29 02:25:51,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:25:51,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:25:51,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:25:51,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:25:51,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:25:51,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.i [2023-11-29 02:25:54,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:25:54,801 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:25:54,801 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.i [2023-11-29 02:25:54,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/data/87ecca013/b0e5aa5357564f6bbe600c7fbd09f83e/FLAGf018ae9dd [2023-11-29 02:25:54,825 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/data/87ecca013/b0e5aa5357564f6bbe600c7fbd09f83e [2023-11-29 02:25:54,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:25:54,829 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:25:54,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:25:54,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:25:54,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:25:54,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:25:54" (1/1) ... [2023-11-29 02:25:54,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13fa1283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:54, skipping insertion in model container [2023-11-29 02:25:54,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:25:54" (1/1) ... [2023-11-29 02:25:54,866 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:25:55,009 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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.i[919,932] [2023-11-29 02:25:55,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:25:55,069 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:25:55,083 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_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-34.i[919,932] [2023-11-29 02:25:55,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:25:55,121 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:25:55,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55 WrapperNode [2023-11-29 02:25:55,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:25:55,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:25:55,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:25:55,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:25:55,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,178 INFO L138 Inliner]: procedures = 26, calls = 26, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 165 [2023-11-29 02:25:55,178 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:25:55,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:25:55,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:25:55,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:25:55,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,210 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 02:25:55,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:25:55,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:25:55,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:25:55,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:25:55,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (1/1) ... [2023-11-29 02:25:55,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:25:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:55,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:25:55,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:25:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:25:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:25:55,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:25:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:25:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:25:55,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:25:55,372 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:25:55,374 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:25:55,707 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:25:55,745 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:25:55,745 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:25:55,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:25:55 BoogieIcfgContainer [2023-11-29 02:25:55,746 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:25:55,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:25:55,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:25:55,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:25:55,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:25:54" (1/3) ... [2023-11-29 02:25:55,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac4da2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:25:55, skipping insertion in model container [2023-11-29 02:25:55,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:25:55" (2/3) ... [2023-11-29 02:25:55,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac4da2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:25:55, skipping insertion in model container [2023-11-29 02:25:55,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:25:55" (3/3) ... [2023-11-29 02:25:55,756 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_dependencies_file-34.i [2023-11-29 02:25:55,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:25:55,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:25:55,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:25:55,814 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;@6f221306, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:25:55,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:25:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 43 states have (on average 1.627906976744186) internal successors, (70), 44 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 02:25:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 02:25:55,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:25:55,828 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:55,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:25:55,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:55,833 INFO L85 PathProgramCache]: Analyzing trace with hash -63205701, now seen corresponding path program 1 times [2023-11-29 02:25:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:55,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411247362] [2023-11-29 02:25:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411247362] [2023-11-29 02:25:56,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:25:56,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009238518] [2023-11-29 02:25:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:56,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:56,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:25:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:56,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:25:56,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-29 02:25:56,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:25:56,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009238518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:56,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:25:56,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:25:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407953379] [2023-11-29 02:25:56,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:25:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:25:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:25:56,279 INFO L87 Difference]: Start difference. First operand has 59 states, 43 states have (on average 1.627906976744186) internal successors, (70), 44 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 02:25:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:25:56,317 INFO L93 Difference]: Finished difference Result 115 states and 203 transitions. [2023-11-29 02:25:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:25:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 88 [2023-11-29 02:25:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:25:56,329 INFO L225 Difference]: With dead ends: 115 [2023-11-29 02:25:56,329 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 02:25:56,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 87 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 02:25:56,337 INFO L413 NwaCegarLoop]: 88 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, 88 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 02:25:56,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:25:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 02:25:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-29 02:25:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 42 states have internal predecessors, (65), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 02:25:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 91 transitions. [2023-11-29 02:25:56,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 91 transitions. Word has length 88 [2023-11-29 02:25:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:25:56,384 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 91 transitions. [2023-11-29 02:25:56,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 02:25:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 91 transitions. [2023-11-29 02:25:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 02:25:56,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:25:56,390 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:56,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:25:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:25:56,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:25:56,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2066451591, now seen corresponding path program 1 times [2023-11-29 02:25:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:56,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698249032] [2023-11-29 02:25:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:56,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:56,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:25:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343057351] [2023-11-29 02:25:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:56,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:56,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:25:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:56,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:56,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:25:56,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:25:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:56,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698249032] [2023-11-29 02:25:56,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:25:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343057351] [2023-11-29 02:25:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343057351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:25:56,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:25:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211967740] [2023-11-29 02:25:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:25:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:25:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:25:56,959 INFO L87 Difference]: Start difference. First operand 57 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:25:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:25:57,178 INFO L93 Difference]: Finished difference Result 183 states and 289 transitions. [2023-11-29 02:25:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:25:57,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 88 [2023-11-29 02:25:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:25:57,182 INFO L225 Difference]: With dead ends: 183 [2023-11-29 02:25:57,182 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 02:25:57,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:25:57,185 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 127 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:25:57,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 221 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:25:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 02:25:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 58. [2023-11-29 02:25:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 02:25:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 91 transitions. [2023-11-29 02:25:57,204 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 91 transitions. Word has length 88 [2023-11-29 02:25:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:25:57,206 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 91 transitions. [2023-11-29 02:25:57,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:25:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 91 transitions. [2023-11-29 02:25:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 02:25:57,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:25:57,209 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:57,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 02:25:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:57,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:25:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -239245462, now seen corresponding path program 1 times [2023-11-29 02:25:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372685192] [2023-11-29 02:25:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:57,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:57,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:25:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857682609] [2023-11-29 02:25:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:57,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:57,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:57,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:57,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:25:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:57,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:57,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:25:57,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:25:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372685192] [2023-11-29 02:25:57,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:25:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857682609] [2023-11-29 02:25:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857682609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:25:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:25:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833465332] [2023-11-29 02:25:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:25:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:25:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:25:57,696 INFO L87 Difference]: Start difference. First operand 58 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:25:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:25:57,814 INFO L93 Difference]: Finished difference Result 198 states and 311 transitions. [2023-11-29 02:25:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:25:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 89 [2023-11-29 02:25:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:25:57,818 INFO L225 Difference]: With dead ends: 198 [2023-11-29 02:25:57,818 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 02:25:57,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:25:57,820 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 107 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:25:57,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 283 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:25:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 02:25:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2023-11-29 02:25:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.5) internal successors, (129), 86 states have internal predecessors, (129), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-29 02:25:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 181 transitions. [2023-11-29 02:25:57,847 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 181 transitions. Word has length 89 [2023-11-29 02:25:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:25:57,848 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 181 transitions. [2023-11-29 02:25:57,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:25:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 181 transitions. [2023-11-29 02:25:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 02:25:57,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:25:57,850 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:57,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:25:58,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:58,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:25:58,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1335395490, now seen corresponding path program 1 times [2023-11-29 02:25:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:58,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430086187] [2023-11-29 02:25:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:58,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:25:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396967548] [2023-11-29 02:25:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:58,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:58,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:58,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:25:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:58,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:25:58,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 02:26:03,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:06,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:06,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430086187] [2023-11-29 02:26:06,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:06,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396967548] [2023-11-29 02:26:06,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396967548] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:06,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:06,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20] total 26 [2023-11-29 02:26:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823080024] [2023-11-29 02:26:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:06,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:26:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:26:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:26:06,884 INFO L87 Difference]: Start difference. First operand 115 states and 181 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:12,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 02:26:16,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 02:26:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:17,795 INFO L93 Difference]: Finished difference Result 319 states and 492 transitions. [2023-11-29 02:26:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:26:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 90 [2023-11-29 02:26:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:17,798 INFO L225 Difference]: With dead ends: 319 [2023-11-29 02:26:17,798 INFO L226 Difference]: Without dead ends: 205 [2023-11-29 02:26:17,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:26:17,800 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 212 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 360 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2023-11-29 02:26:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-29 02:26:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2023-11-29 02:26:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 115 states have internal predecessors, (167), 31 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 02:26:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 229 transitions. [2023-11-29 02:26:17,830 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 229 transitions. Word has length 90 [2023-11-29 02:26:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:17,831 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 229 transitions. [2023-11-29 02:26:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 229 transitions. [2023-11-29 02:26:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 02:26:17,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:17,833 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:17,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:26:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:18,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:18,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1184564444, now seen corresponding path program 1 times [2023-11-29 02:26:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:18,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113089278] [2023-11-29 02:26:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:18,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:18,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729635201] [2023-11-29 02:26:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:18,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:18,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:26:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:18,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:26:18,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 96 proven. 30 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-29 02:26:19,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:23,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113089278] [2023-11-29 02:26:23,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729635201] [2023-11-29 02:26:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729635201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:23,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 02:26:23,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378881034] [2023-11-29 02:26:23,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:23,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:26:23,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:26:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:26:23,210 INFO L87 Difference]: Start difference. First operand 150 states and 229 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 02:26:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:23,957 INFO L93 Difference]: Finished difference Result 492 states and 741 transitions. [2023-11-29 02:26:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:26:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 90 [2023-11-29 02:26:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:23,961 INFO L225 Difference]: With dead ends: 492 [2023-11-29 02:26:23,961 INFO L226 Difference]: Without dead ends: 350 [2023-11-29 02:26:23,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:26:23,963 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 228 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:23,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 339 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:26:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-29 02:26:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 294. [2023-11-29 02:26:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 248 states have (on average 1.4556451612903225) internal successors, (361), 248 states have internal predecessors, (361), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-29 02:26:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 439 transitions. [2023-11-29 02:26:24,006 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 439 transitions. Word has length 90 [2023-11-29 02:26:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:24,006 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 439 transitions. [2023-11-29 02:26:24,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 02:26:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 439 transitions. [2023-11-29 02:26:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 02:26:24,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:24,009 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:24,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:24,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:24,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2036460068, now seen corresponding path program 1 times [2023-11-29 02:26:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111009236] [2023-11-29 02:26:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:24,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:24,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665749108] [2023-11-29 02:26:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:24,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:24,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:24,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:24,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:26:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:24,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:26:24,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:24,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111009236] [2023-11-29 02:26:24,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665749108] [2023-11-29 02:26:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665749108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:24,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:24,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170467531] [2023-11-29 02:26:24,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:24,455 INFO L87 Difference]: Start difference. First operand 294 states and 439 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:24,653 INFO L93 Difference]: Finished difference Result 476 states and 710 transitions. [2023-11-29 02:26:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:26:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 90 [2023-11-29 02:26:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:24,655 INFO L225 Difference]: With dead ends: 476 [2023-11-29 02:26:24,656 INFO L226 Difference]: Without dead ends: 278 [2023-11-29 02:26:24,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:26:24,657 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:24,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:26:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-29 02:26:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 264. [2023-11-29 02:26:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 218 states have (on average 1.4174311926605505) internal successors, (309), 218 states have internal predecessors, (309), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-29 02:26:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 387 transitions. [2023-11-29 02:26:24,690 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 387 transitions. Word has length 90 [2023-11-29 02:26:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:24,691 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 387 transitions. [2023-11-29 02:26:24,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 387 transitions. [2023-11-29 02:26:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 02:26:24,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:24,693 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:24,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:26:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:26:24,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:24,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1530152756, now seen corresponding path program 1 times [2023-11-29 02:26:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633683928] [2023-11-29 02:26:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:24,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:24,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360995208] [2023-11-29 02:26:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:24,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:24,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:24,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:24,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:26:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:25,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:26:25,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 231 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 02:26:26,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:28,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:28,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633683928] [2023-11-29 02:26:28,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:28,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360995208] [2023-11-29 02:26:28,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360995208] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:28,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:28,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 27 [2023-11-29 02:26:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503522150] [2023-11-29 02:26:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:28,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:26:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:26:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:26:28,556 INFO L87 Difference]: Start difference. First operand 264 states and 387 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:29,348 INFO L93 Difference]: Finished difference Result 541 states and 807 transitions. [2023-11-29 02:26:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:26:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 91 [2023-11-29 02:26:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:29,352 INFO L225 Difference]: With dead ends: 541 [2023-11-29 02:26:29,352 INFO L226 Difference]: Without dead ends: 399 [2023-11-29 02:26:29,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:26:29,354 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 180 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:29,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 312 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:26:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-29 02:26:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 267. [2023-11-29 02:26:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 221 states have (on average 1.4343891402714932) internal successors, (317), 221 states have internal predecessors, (317), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-29 02:26:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 395 transitions. [2023-11-29 02:26:29,379 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 395 transitions. Word has length 91 [2023-11-29 02:26:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:29,379 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 395 transitions. [2023-11-29 02:26:29,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 395 transitions. [2023-11-29 02:26:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 02:26:29,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:29,381 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:29,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:26:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:26:29,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:29,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1014919727, now seen corresponding path program 1 times [2023-11-29 02:26:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105514007] [2023-11-29 02:26:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:29,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:29,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815142316] [2023-11-29 02:26:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:29,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:29,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:26:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:31,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:26:31,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:32,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:32,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105514007] [2023-11-29 02:26:32,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815142316] [2023-11-29 02:26:32,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815142316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:32,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:32,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:26:32,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455432024] [2023-11-29 02:26:32,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:32,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:26:32,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:26:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:26:32,252 INFO L87 Difference]: Start difference. First operand 267 states and 395 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:32,979 INFO L93 Difference]: Finished difference Result 490 states and 727 transitions. [2023-11-29 02:26:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:26:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 91 [2023-11-29 02:26:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:32,981 INFO L225 Difference]: With dead ends: 490 [2023-11-29 02:26:32,981 INFO L226 Difference]: Without dead ends: 309 [2023-11-29 02:26:32,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:26:32,982 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 148 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:32,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 324 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:26:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-29 02:26:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 279. [2023-11-29 02:26:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 233 states have (on average 1.4120171673819744) internal successors, (329), 233 states have internal predecessors, (329), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-29 02:26:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 407 transitions. [2023-11-29 02:26:33,015 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 407 transitions. Word has length 91 [2023-11-29 02:26:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:33,016 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 407 transitions. [2023-11-29 02:26:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 407 transitions. [2023-11-29 02:26:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 02:26:33,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:33,018 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:33,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:26:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:26:33,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -957661425, now seen corresponding path program 1 times [2023-11-29 02:26:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:33,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317012809] [2023-11-29 02:26:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:33,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:33,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327145843] [2023-11-29 02:26:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:33,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:33,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:33,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:26:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:33,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:26:33,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:37,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:37,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:37,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317012809] [2023-11-29 02:26:37,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:37,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327145843] [2023-11-29 02:26:37,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327145843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:37,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:37,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:26:37,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022475729] [2023-11-29 02:26:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:37,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:26:37,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:37,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:26:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:37,705 INFO L87 Difference]: Start difference. First operand 279 states and 407 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:40,158 INFO L93 Difference]: Finished difference Result 526 states and 770 transitions. [2023-11-29 02:26:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:26:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 91 [2023-11-29 02:26:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:40,161 INFO L225 Difference]: With dead ends: 526 [2023-11-29 02:26:40,161 INFO L226 Difference]: Without dead ends: 449 [2023-11-29 02:26:40,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:26:40,162 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 213 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 402 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:26:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-29 02:26:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 401. [2023-11-29 02:26:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 340 states have (on average 1.4147058823529413) internal successors, (481), 340 states have internal predecessors, (481), 52 states have call successors, (52), 8 states have call predecessors, (52), 8 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:26:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 585 transitions. [2023-11-29 02:26:40,199 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 585 transitions. Word has length 91 [2023-11-29 02:26:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:40,200 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 585 transitions. [2023-11-29 02:26:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 585 transitions. [2023-11-29 02:26:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 02:26:40,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:40,202 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:40,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:26:40,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 02:26:40,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:40,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -370855411, now seen corresponding path program 1 times [2023-11-29 02:26:40,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:40,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549213844] [2023-11-29 02:26:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:40,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:40,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647354236] [2023-11-29 02:26:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:40,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:40,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:26:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:40,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:26:40,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:43,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549213844] [2023-11-29 02:26:43,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647354236] [2023-11-29 02:26:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647354236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:43,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:43,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:26:43,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111501464] [2023-11-29 02:26:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:26:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:26:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:43,981 INFO L87 Difference]: Start difference. First operand 401 states and 585 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:45,745 INFO L93 Difference]: Finished difference Result 727 states and 1076 transitions. [2023-11-29 02:26:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:26:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 91 [2023-11-29 02:26:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:45,750 INFO L225 Difference]: With dead ends: 727 [2023-11-29 02:26:45,750 INFO L226 Difference]: Without dead ends: 494 [2023-11-29 02:26:45,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:26:45,751 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 152 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:45,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 357 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:26:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-29 02:26:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 409. [2023-11-29 02:26:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 348 states have (on average 1.410919540229885) internal successors, (491), 348 states have internal predecessors, (491), 52 states have call successors, (52), 8 states have call predecessors, (52), 8 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:26:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 595 transitions. [2023-11-29 02:26:45,796 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 595 transitions. Word has length 91 [2023-11-29 02:26:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:45,796 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 595 transitions. [2023-11-29 02:26:45,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 595 transitions. [2023-11-29 02:26:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 02:26:45,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:45,798 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:45,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:26:45,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:26:45,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:45,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash -508875523, now seen corresponding path program 1 times [2023-11-29 02:26:45,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814138568] [2023-11-29 02:26:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:45,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:46,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:46,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867135094] [2023-11-29 02:26:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:46,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:46,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:26:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:46,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:26:46,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:47,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814138568] [2023-11-29 02:26:47,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867135094] [2023-11-29 02:26:47,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867135094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:47,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:47,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:26:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390186259] [2023-11-29 02:26:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:47,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:26:47,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:26:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:47,378 INFO L87 Difference]: Start difference. First operand 409 states and 595 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:48,211 INFO L93 Difference]: Finished difference Result 647 states and 948 transitions. [2023-11-29 02:26:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:26:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 02:26:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:48,215 INFO L225 Difference]: With dead ends: 647 [2023-11-29 02:26:48,215 INFO L226 Difference]: Without dead ends: 479 [2023-11-29 02:26:48,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:26:48,217 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 171 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:48,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 461 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:26:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-29 02:26:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 407. [2023-11-29 02:26:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 346 states have (on average 1.4104046242774566) internal successors, (488), 346 states have internal predecessors, (488), 52 states have call successors, (52), 8 states have call predecessors, (52), 8 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:26:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 592 transitions. [2023-11-29 02:26:48,259 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 592 transitions. Word has length 92 [2023-11-29 02:26:48,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:48,259 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 592 transitions. [2023-11-29 02:26:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 592 transitions. [2023-11-29 02:26:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 02:26:48,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:48,260 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:48,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:48,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:48,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash 502241727, now seen corresponding path program 1 times [2023-11-29 02:26:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589546326] [2023-11-29 02:26:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:48,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143460265] [2023-11-29 02:26:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:48,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:48,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:26:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:48,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:26:48,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 02:26:49,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:49,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589546326] [2023-11-29 02:26:49,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143460265] [2023-11-29 02:26:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143460265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:49,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:49,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:26:49,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044802435] [2023-11-29 02:26:49,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:49,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:26:49,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:26:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:49,715 INFO L87 Difference]: Start difference. First operand 407 states and 592 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:26:50,380 INFO L93 Difference]: Finished difference Result 786 states and 1157 transitions. [2023-11-29 02:26:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:26:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 02:26:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:26:50,384 INFO L225 Difference]: With dead ends: 786 [2023-11-29 02:26:50,384 INFO L226 Difference]: Without dead ends: 536 [2023-11-29 02:26:50,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:26:50,386 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 125 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:26:50,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 410 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:26:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-11-29 02:26:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 402. [2023-11-29 02:26:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 341 states have (on average 1.4076246334310851) internal successors, (480), 341 states have internal predecessors, (480), 52 states have call successors, (52), 8 states have call predecessors, (52), 8 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:26:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 584 transitions. [2023-11-29 02:26:50,434 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 584 transitions. Word has length 92 [2023-11-29 02:26:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:26:50,435 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 584 transitions. [2023-11-29 02:26:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 02:26:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 584 transitions. [2023-11-29 02:26:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:26:50,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:26:50,437 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:50,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:26:50,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:50,640 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:26:50,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1873413870, now seen corresponding path program 1 times [2023-11-29 02:26:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:50,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408053581] [2023-11-29 02:26:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:50,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:50,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083216806] [2023-11-29 02:26:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:50,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:50,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_708a8b89-04f8-4d9f-a3a4-cf82ca317e0a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:26:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:50,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 02:26:50,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 02:28:40,721 INFO L327 TraceCheckSpWp]: Computing backward predicates...