./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme --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 568715a232aa16d18571b6e9b4b6f71d3297e66e84733db9163f76f7b8e7e31f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:59,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:00,018 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:00,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:00,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:00,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:00,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:00,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:00,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:00,079 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:00,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:00,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:00,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:00,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:00,083 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:00,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:00,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:00,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:00,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:00,085 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:00,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:00,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:00,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:00,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:00,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:00,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:00,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:00,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:00,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:00,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:00,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:00,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:00,093 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:00,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:00,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:00,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:00,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:00,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:00,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:00,095 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:00,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:00,095 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:00,096 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_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 568715a232aa16d18571b6e9b4b6f71d3297e66e84733db9163f76f7b8e7e31f [2023-11-26 10:44:00,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:00,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:00,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:00,464 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:00,464 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:00,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i [2023-11-26 10:44:03,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:03,906 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:03,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i [2023-11-26 10:44:03,929 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/data/ac2eebca5/9af265140ae941c69b6e46e67da2e0cf/FLAG2ef75a0c7 [2023-11-26 10:44:03,945 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/data/ac2eebca5/9af265140ae941c69b6e46e67da2e0cf [2023-11-26 10:44:03,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:03,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:03,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:03,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:03,958 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:03,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:03" (1/1) ... [2023-11-26 10:44:03,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f38ef90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:03, skipping insertion in model container [2023-11-26 10:44:03,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:03" (1/1) ... [2023-11-26 10:44:04,016 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:04,177 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_f8c378db-1092-4de2-a41c-f10a267bb6e9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i[916,929] [2023-11-26 10:44:04,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:04,402 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:04,415 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_f8c378db-1092-4de2-a41c-f10a267bb6e9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-11.i[916,929] [2023-11-26 10:44:04,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:04,541 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:04,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04 WrapperNode [2023-11-26 10:44:04,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:04,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:04,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:04,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:04,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,645 INFO L138 Inliner]: procedures = 26, calls = 94, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 560 [2023-11-26 10:44:04,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:04,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:04,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:04,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:04,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,668 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,696 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]. [2023-11-26 10:44:04,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:04,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:04,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:04,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:04,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (1/1) ... [2023-11-26 10:44:04,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:04,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:04,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:04,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:44:04,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:44:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:04,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:05,050 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:05,052 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:06,091 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:06,169 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:06,175 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:44:06,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:06 BoogieIcfgContainer [2023-11-26 10:44:06,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:06,179 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:06,179 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:06,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:06,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:03" (1/3) ... [2023-11-26 10:44:06,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44db9f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:06, skipping insertion in model container [2023-11-26 10:44:06,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:04" (2/3) ... [2023-11-26 10:44:06,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44db9f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:06, skipping insertion in model container [2023-11-26 10:44:06,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:06" (3/3) ... [2023-11-26 10:44:06,189 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-11.i [2023-11-26 10:44:06,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:06,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:06,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:06,281 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;@673068c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:06,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:44:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 139 states have (on average 1.589928057553957) internal successors, (221), 140 states have internal predecessors, (221), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-26 10:44:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-26 10:44:06,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:06,329 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:06,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1532121836, now seen corresponding path program 1 times [2023-11-26 10:44:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:06,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731227832] [2023-11-26 10:44:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:06,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731227832] [2023-11-26 10:44:06,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:44:06,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719108102] [2023-11-26 10:44:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:06,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:06,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:06,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:06,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:07,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:44:07,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2023-11-26 10:44:07,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:07,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719108102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:07,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:07,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340376005] [2023-11-26 10:44:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:44:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:07,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:44:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:07,433 INFO L87 Difference]: Start difference. First operand has 223 states, 139 states have (on average 1.589928057553957) internal successors, (221), 140 states have internal predecessors, (221), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-26 10:44:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:07,581 INFO L93 Difference]: Finished difference Result 443 states and 845 transitions. [2023-11-26 10:44:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:44:07,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) Word has length 492 [2023-11-26 10:44:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:07,597 INFO L225 Difference]: With dead ends: 443 [2023-11-26 10:44:07,597 INFO L226 Difference]: Without dead ends: 221 [2023-11-26 10:44:07,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:07,609 INFO L413 NwaCegarLoop]: 373 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, 373 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 [2023-11-26 10:44:07,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 373 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-26 10:44:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-11-26 10:44:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 81 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-26 10:44:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 376 transitions. [2023-11-26 10:44:07,695 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 376 transitions. Word has length 492 [2023-11-26 10:44:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:07,696 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 376 transitions. [2023-11-26 10:44:07,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-26 10:44:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 376 transitions. [2023-11-26 10:44:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-26 10:44:07,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:07,739 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:07,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:44:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:44:07,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:07,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1186838450, now seen corresponding path program 1 times [2023-11-26 10:44:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:07,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123048986] [2023-11-26 10:44:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:08,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:08,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866193518] [2023-11-26 10:44:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:08,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:08,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:44:08,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:08,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:08,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123048986] [2023-11-26 10:44:08,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:08,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866193518] [2023-11-26 10:44:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866193518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:08,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:08,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961335264] [2023-11-26 10:44:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:08,760 INFO L87 Difference]: Start difference. First operand 221 states and 376 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:09,093 INFO L93 Difference]: Finished difference Result 690 states and 1169 transitions. [2023-11-26 10:44:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 492 [2023-11-26 10:44:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:09,113 INFO L225 Difference]: With dead ends: 690 [2023-11-26 10:44:09,113 INFO L226 Difference]: Without dead ends: 470 [2023-11-26 10:44:09,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:09,122 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 571 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:09,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1480 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:44:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-11-26 10:44:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 334. [2023-11-26 10:44:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 234 states have internal predecessors, (380), 98 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-26 10:44:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 576 transitions. [2023-11-26 10:44:09,222 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 576 transitions. Word has length 492 [2023-11-26 10:44:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:09,224 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 576 transitions. [2023-11-26 10:44:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 576 transitions. [2023-11-26 10:44:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-26 10:44:09,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:09,232 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:09,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:09,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:09,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:09,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash -703232924, now seen corresponding path program 1 times [2023-11-26 10:44:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:09,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777105310] [2023-11-26 10:44:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:09,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:09,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966040567] [2023-11-26 10:44:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:09,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:09,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:09,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:09,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:09,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:09,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:09,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777105310] [2023-11-26 10:44:09,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:09,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966040567] [2023-11-26 10:44:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966040567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:09,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:09,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414800527] [2023-11-26 10:44:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:10,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:10,002 INFO L87 Difference]: Start difference. First operand 334 states and 576 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:10,070 INFO L93 Difference]: Finished difference Result 891 states and 1536 transitions. [2023-11-26 10:44:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 493 [2023-11-26 10:44:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:10,083 INFO L225 Difference]: With dead ends: 891 [2023-11-26 10:44:10,084 INFO L226 Difference]: Without dead ends: 558 [2023-11-26 10:44:10,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:10,088 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 241 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:10,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 824 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-11-26 10:44:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 555. [2023-11-26 10:44:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 400 states have internal predecessors, (649), 153 states have call successors, (153), 4 states have call predecessors, (153), 4 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 10:44:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 955 transitions. [2023-11-26 10:44:10,175 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 955 transitions. Word has length 493 [2023-11-26 10:44:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:10,177 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 955 transitions. [2023-11-26 10:44:10,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 955 transitions. [2023-11-26 10:44:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-26 10:44:10,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:10,184 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:10,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 10:44:10,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 10:44:10,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:10,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:10,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1547238426, now seen corresponding path program 1 times [2023-11-26 10:44:10,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:10,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881735513] [2023-11-26 10:44:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:10,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:10,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:10,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852316510] [2023-11-26 10:44:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:10,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:10,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:10,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:44:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:10,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:10,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:10,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:10,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881735513] [2023-11-26 10:44:10,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852316510] [2023-11-26 10:44:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852316510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:10,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:10,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:10,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364642283] [2023-11-26 10:44:10,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:10,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:10,879 INFO L87 Difference]: Start difference. First operand 555 states and 955 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:10,975 INFO L93 Difference]: Finished difference Result 1513 states and 2601 transitions. [2023-11-26 10:44:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 493 [2023-11-26 10:44:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:10,987 INFO L225 Difference]: With dead ends: 1513 [2023-11-26 10:44:10,987 INFO L226 Difference]: Without dead ends: 959 [2023-11-26 10:44:10,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:10,993 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 218 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:10,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 865 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2023-11-26 10:44:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 955. [2023-11-26 10:44:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 697 states have (on average 1.6327116212338595) internal successors, (1138), 704 states have internal predecessors, (1138), 249 states have call successors, (249), 8 states have call predecessors, (249), 8 states have return successors, (249), 242 states have call predecessors, (249), 249 states have call successors, (249) [2023-11-26 10:44:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1636 transitions. [2023-11-26 10:44:11,136 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1636 transitions. Word has length 493 [2023-11-26 10:44:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:11,137 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1636 transitions. [2023-11-26 10:44:11,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1636 transitions. [2023-11-26 10:44:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-26 10:44:11,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:11,145 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:11,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:11,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:11,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash -252066975, now seen corresponding path program 1 times [2023-11-26 10:44:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436969052] [2023-11-26 10:44:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:11,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:11,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324096507] [2023-11-26 10:44:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:11,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:11,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:11,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:44:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:11,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:11,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6540 proven. 126 refuted. 0 times theorem prover too weak. 6294 trivial. 0 not checked. [2023-11-26 10:44:12,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 114 proven. 126 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-11-26 10:44:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:12,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436969052] [2023-11-26 10:44:12,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:12,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324096507] [2023-11-26 10:44:12,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324096507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:12,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:12,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:44:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070841032] [2023-11-26 10:44:12,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:12,754 INFO L87 Difference]: Start difference. First operand 955 states and 1636 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-26 10:44:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:13,351 INFO L93 Difference]: Finished difference Result 1526 states and 2601 transitions. [2023-11-26 10:44:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:44:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) Word has length 494 [2023-11-26 10:44:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:13,358 INFO L225 Difference]: With dead ends: 1526 [2023-11-26 10:44:13,359 INFO L226 Difference]: Without dead ends: 572 [2023-11-26 10:44:13,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:44:13,363 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 394 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:13,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 681 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:44:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-11-26 10:44:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 558. [2023-11-26 10:44:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 405 states have (on average 1.6197530864197531) internal successors, (656), 408 states have internal predecessors, (656), 146 states have call successors, (146), 6 states have call predecessors, (146), 6 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-26 10:44:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 948 transitions. [2023-11-26 10:44:13,419 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 948 transitions. Word has length 494 [2023-11-26 10:44:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:13,421 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 948 transitions. [2023-11-26 10:44:13,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-26 10:44:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 948 transitions. [2023-11-26 10:44:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:44:13,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:13,428 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:13,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:13,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:13,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:13,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1862975931, now seen corresponding path program 1 times [2023-11-26 10:44:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193753405] [2023-11-26 10:44:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:13,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895830492] [2023-11-26 10:44:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:13,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:13,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:13,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:44:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:14,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:44:14,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:14,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:14,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:14,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193753405] [2023-11-26 10:44:14,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895830492] [2023-11-26 10:44:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895830492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725894816] [2023-11-26 10:44:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:14,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:14,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:14,135 INFO L87 Difference]: Start difference. First operand 558 states and 948 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:14,268 INFO L93 Difference]: Finished difference Result 1660 states and 2818 transitions. [2023-11-26 10:44:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 497 [2023-11-26 10:44:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:14,279 INFO L225 Difference]: With dead ends: 1660 [2023-11-26 10:44:14,279 INFO L226 Difference]: Without dead ends: 1103 [2023-11-26 10:44:14,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:14,283 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 364 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:14,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1805 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-11-26 10:44:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 574. [2023-11-26 10:44:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 421 states have (on average 1.6152019002375297) internal successors, (680), 424 states have internal predecessors, (680), 146 states have call successors, (146), 6 states have call predecessors, (146), 6 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-26 10:44:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 972 transitions. [2023-11-26 10:44:14,362 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 972 transitions. Word has length 497 [2023-11-26 10:44:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:14,364 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 972 transitions. [2023-11-26 10:44:14,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 972 transitions. [2023-11-26 10:44:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:44:14,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:14,370 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:14,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:44:14,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:14,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1862916349, now seen corresponding path program 1 times [2023-11-26 10:44:14,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:14,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347322157] [2023-11-26 10:44:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:14,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536320236] [2023-11-26 10:44:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:14,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:14,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:44:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:15,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:15,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 6558 proven. 117 refuted. 0 times theorem prover too weak. 6285 trivial. 0 not checked. [2023-11-26 10:44:15,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 123 proven. 117 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-11-26 10:44:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347322157] [2023-11-26 10:44:15,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:15,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536320236] [2023-11-26 10:44:15,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536320236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:15,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:15,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:44:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612026738] [2023-11-26 10:44:15,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:15,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:15,929 INFO L87 Difference]: Start difference. First operand 574 states and 972 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-26 10:44:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:16,570 INFO L93 Difference]: Finished difference Result 1163 states and 1958 transitions. [2023-11-26 10:44:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:44:16,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 497 [2023-11-26 10:44:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:16,579 INFO L225 Difference]: With dead ends: 1163 [2023-11-26 10:44:16,579 INFO L226 Difference]: Without dead ends: 590 [2023-11-26 10:44:16,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 986 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:44:16,583 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 387 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:16,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 679 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:44:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-26 10:44:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 578. [2023-11-26 10:44:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 424 states have (on average 1.6014150943396226) internal successors, (679), 427 states have internal predecessors, (679), 146 states have call successors, (146), 7 states have call predecessors, (146), 7 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-26 10:44:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 971 transitions. [2023-11-26 10:44:16,646 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 971 transitions. Word has length 497 [2023-11-26 10:44:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:16,647 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 971 transitions. [2023-11-26 10:44:16,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-26 10:44:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 971 transitions. [2023-11-26 10:44:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-26 10:44:16,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:16,653 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:16,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:16,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1514496023, now seen corresponding path program 1 times [2023-11-26 10:44:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066124418] [2023-11-26 10:44:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:16,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:16,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342362385] [2023-11-26 10:44:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:16,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:16,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:16,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:44:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:17,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:44:17,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:17,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:17,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:17,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066124418] [2023-11-26 10:44:17,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:17,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342362385] [2023-11-26 10:44:17,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342362385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:17,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:17,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488187630] [2023-11-26 10:44:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:17,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:17,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:17,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:17,389 INFO L87 Difference]: Start difference. First operand 578 states and 971 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:17,724 INFO L93 Difference]: Finished difference Result 1740 states and 2917 transitions. [2023-11-26 10:44:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 498 [2023-11-26 10:44:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:17,736 INFO L225 Difference]: With dead ends: 1740 [2023-11-26 10:44:17,736 INFO L226 Difference]: Without dead ends: 1163 [2023-11-26 10:44:17,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:17,741 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 595 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:17,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1302 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:44:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2023-11-26 10:44:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2023-11-26 10:44:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 852 states have (on average 1.5938967136150235) internal successors, (1358), 858 states have internal predecessors, (1358), 292 states have call successors, (292), 16 states have call predecessors, (292), 16 states have return successors, (292), 286 states have call predecessors, (292), 292 states have call successors, (292) [2023-11-26 10:44:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1942 transitions. [2023-11-26 10:44:17,893 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1942 transitions. Word has length 498 [2023-11-26 10:44:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:17,894 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1942 transitions. [2023-11-26 10:44:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1942 transitions. [2023-11-26 10:44:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-26 10:44:17,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:17,901 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:17,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:18,108 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:18,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash 503378773, now seen corresponding path program 1 times [2023-11-26 10:44:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199448220] [2023-11-26 10:44:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:18,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040866796] [2023-11-26 10:44:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:18,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:18,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:44:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:18,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:18,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 1010 proven. 231 refuted. 0 times theorem prover too weak. 11719 trivial. 0 not checked. [2023-11-26 10:44:19,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 9 proven. 231 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-11-26 10:44:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199448220] [2023-11-26 10:44:20,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:20,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040866796] [2023-11-26 10:44:20,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040866796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:20,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 10:44:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469371943] [2023-11-26 10:44:20,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:44:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:44:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:20,107 INFO L87 Difference]: Start difference. First operand 1161 states and 1942 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-26 10:44:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:20,881 INFO L93 Difference]: Finished difference Result 2361 states and 3899 transitions. [2023-11-26 10:44:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:44:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) Word has length 498 [2023-11-26 10:44:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:20,893 INFO L225 Difference]: With dead ends: 2361 [2023-11-26 10:44:20,893 INFO L226 Difference]: Without dead ends: 1201 [2023-11-26 10:44:20,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 987 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:44:20,899 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 465 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:20,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 677 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:44:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2023-11-26 10:44:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1161. [2023-11-26 10:44:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 844 states have (on average 1.561611374407583) internal successors, (1318), 850 states have internal predecessors, (1318), 292 states have call successors, (292), 24 states have call predecessors, (292), 24 states have return successors, (292), 286 states have call predecessors, (292), 292 states have call successors, (292) [2023-11-26 10:44:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1902 transitions. [2023-11-26 10:44:21,052 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1902 transitions. Word has length 498 [2023-11-26 10:44:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:21,053 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1902 transitions. [2023-11-26 10:44:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-26 10:44:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1902 transitions. [2023-11-26 10:44:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 10:44:21,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:21,060 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:21,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:21,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:21,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:21,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1904801934, now seen corresponding path program 1 times [2023-11-26 10:44:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322362418] [2023-11-26 10:44:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:21,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729308984] [2023-11-26 10:44:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:21,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:44:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:21,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:21,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:22,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:22,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322362418] [2023-11-26 10:44:22,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:22,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729308984] [2023-11-26 10:44:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729308984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:22,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095266307] [2023-11-26 10:44:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:22,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:22,523 INFO L87 Difference]: Start difference. First operand 1161 states and 1902 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:24,032 INFO L93 Difference]: Finished difference Result 5995 states and 9807 transitions. [2023-11-26 10:44:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 499 [2023-11-26 10:44:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:24,069 INFO L225 Difference]: With dead ends: 5995 [2023-11-26 10:44:24,069 INFO L226 Difference]: Without dead ends: 4835 [2023-11-26 10:44:24,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:44:24,076 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1011 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:24,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 1521 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:44:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2023-11-26 10:44:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3531. [2023-11-26 10:44:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2582 states have (on average 1.5584817970565452) internal successors, (4024), 2600 states have internal predecessors, (4024), 876 states have call successors, (876), 72 states have call predecessors, (876), 72 states have return successors, (876), 858 states have call predecessors, (876), 876 states have call successors, (876) [2023-11-26 10:44:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 5776 transitions. [2023-11-26 10:44:24,626 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 5776 transitions. Word has length 499 [2023-11-26 10:44:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:24,628 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 5776 transitions. [2023-11-26 10:44:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 5776 transitions. [2023-11-26 10:44:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 10:44:24,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:24,636 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:24,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:24,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:44:24,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:24,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -542713458, now seen corresponding path program 1 times [2023-11-26 10:44:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595589027] [2023-11-26 10:44:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:24,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:24,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027044225] [2023-11-26 10:44:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:24,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:24,917 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:24,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:44:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:25,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:44:25,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:27,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:27,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:27,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595589027] [2023-11-26 10:44:27,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:27,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027044225] [2023-11-26 10:44:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027044225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:27,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:27,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304380564] [2023-11-26 10:44:27,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:27,238 INFO L87 Difference]: Start difference. First operand 3531 states and 5776 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:28,204 INFO L93 Difference]: Finished difference Result 8264 states and 13601 transitions. [2023-11-26 10:44:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 499 [2023-11-26 10:44:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:28,241 INFO L225 Difference]: With dead ends: 8264 [2023-11-26 10:44:28,241 INFO L226 Difference]: Without dead ends: 4734 [2023-11-26 10:44:28,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:44:28,254 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 329 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:28,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1291 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:44:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2023-11-26 10:44:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4432. [2023-11-26 10:44:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3396 states have (on average 1.6051236749116609) internal successors, (5451), 3414 states have internal predecessors, (5451), 957 states have call successors, (957), 78 states have call predecessors, (957), 78 states have return successors, (957), 939 states have call predecessors, (957), 957 states have call successors, (957) [2023-11-26 10:44:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 7365 transitions. [2023-11-26 10:44:28,835 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 7365 transitions. Word has length 499 [2023-11-26 10:44:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:28,836 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 7365 transitions. [2023-11-26 10:44:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 7365 transitions. [2023-11-26 10:44:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-26 10:44:28,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:28,843 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:28,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:29,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:44:29,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:29,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash 276074268, now seen corresponding path program 1 times [2023-11-26 10:44:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130963635] [2023-11-26 10:44:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:29,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:29,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606423588] [2023-11-26 10:44:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:29,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:29,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:29,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:44:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:29,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:44:29,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:30,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130963635] [2023-11-26 10:44:30,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606423588] [2023-11-26 10:44:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606423588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:30,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:30,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881907563] [2023-11-26 10:44:30,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:30,240 INFO L87 Difference]: Start difference. First operand 4432 states and 7365 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:30,704 INFO L93 Difference]: Finished difference Result 9684 states and 16053 transitions. [2023-11-26 10:44:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 500 [2023-11-26 10:44:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:30,766 INFO L225 Difference]: With dead ends: 9684 [2023-11-26 10:44:30,766 INFO L226 Difference]: Without dead ends: 5972 [2023-11-26 10:44:30,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:30,780 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 130 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:30,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 731 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2023-11-26 10:44:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 5850. [2023-11-26 10:44:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 4498 states have (on average 1.6058248110271232) internal successors, (7223), 4522 states have internal predecessors, (7223), 1249 states have call successors, (1249), 102 states have call predecessors, (1249), 102 states have return successors, (1249), 1225 states have call predecessors, (1249), 1249 states have call successors, (1249) [2023-11-26 10:44:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 9721 transitions. [2023-11-26 10:44:31,556 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 9721 transitions. Word has length 500 [2023-11-26 10:44:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:31,557 INFO L495 AbstractCegarLoop]: Abstraction has 5850 states and 9721 transitions. [2023-11-26 10:44:31,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 9721 transitions. [2023-11-26 10:44:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-26 10:44:31,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:31,568 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:31,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:44:31,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:31,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -471190904, now seen corresponding path program 1 times [2023-11-26 10:44:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439904393] [2023-11-26 10:44:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:31,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778129264] [2023-11-26 10:44:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:31,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:31,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:44:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:32,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:32,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 5300 proven. 66 refuted. 0 times theorem prover too weak. 7594 trivial. 0 not checked. [2023-11-26 10:44:32,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 174 proven. 66 refuted. 0 times theorem prover too weak. 12720 trivial. 0 not checked. [2023-11-26 10:44:32,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439904393] [2023-11-26 10:44:32,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778129264] [2023-11-26 10:44:32,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778129264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:32,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 10:44:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759714272] [2023-11-26 10:44:32,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:44:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:44:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:44:32,931 INFO L87 Difference]: Start difference. First operand 5850 states and 9721 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-26 10:44:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:34,009 INFO L93 Difference]: Finished difference Result 8620 states and 14157 transitions. [2023-11-26 10:44:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:44:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) Word has length 501 [2023-11-26 10:44:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:34,047 INFO L225 Difference]: With dead ends: 8620 [2023-11-26 10:44:34,047 INFO L226 Difference]: Without dead ends: 6054 [2023-11-26 10:44:34,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 994 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:44:34,058 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 226 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:34,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 682 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:44:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2023-11-26 10:44:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 5886. [2023-11-26 10:44:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5886 states, 4525 states have (on average 1.5951381215469613) internal successors, (7218), 4549 states have internal predecessors, (7218), 1249 states have call successors, (1249), 111 states have call predecessors, (1249), 111 states have return successors, (1249), 1225 states have call predecessors, (1249), 1249 states have call successors, (1249) [2023-11-26 10:44:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5886 states to 5886 states and 9716 transitions. [2023-11-26 10:44:34,832 INFO L78 Accepts]: Start accepts. Automaton has 5886 states and 9716 transitions. Word has length 501 [2023-11-26 10:44:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:34,834 INFO L495 AbstractCegarLoop]: Abstraction has 5886 states and 9716 transitions. [2023-11-26 10:44:34,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-26 10:44:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5886 states and 9716 transitions. [2023-11-26 10:44:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-26 10:44:34,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:34,843 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:34,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:35,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:35,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:35,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1336269802, now seen corresponding path program 1 times [2023-11-26 10:44:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629960499] [2023-11-26 10:44:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:35,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:35,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966381907] [2023-11-26 10:44:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:35,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:35,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:35,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:35,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:44:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:35,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:44:35,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:35,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:35,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:35,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629960499] [2023-11-26 10:44:35,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:35,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966381907] [2023-11-26 10:44:35,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966381907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:35,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:35,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710070446] [2023-11-26 10:44:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:35,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:35,663 INFO L87 Difference]: Start difference. First operand 5886 states and 9716 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:36,588 INFO L93 Difference]: Finished difference Result 14007 states and 23067 transitions. [2023-11-26 10:44:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) Word has length 501 [2023-11-26 10:44:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:36,642 INFO L225 Difference]: With dead ends: 14007 [2023-11-26 10:44:36,643 INFO L226 Difference]: Without dead ends: 11207 [2023-11-26 10:44:36,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:36,655 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 356 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:36,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 955 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2023-11-26 10:44:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 11205. [2023-11-26 10:44:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11205 states, 8572 states have (on average 1.5848110125991601) internal successors, (13585), 8620 states have internal predecessors, (13585), 2417 states have call successors, (2417), 215 states have call predecessors, (2417), 215 states have return successors, (2417), 2369 states have call predecessors, (2417), 2417 states have call successors, (2417) [2023-11-26 10:44:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11205 states to 11205 states and 18419 transitions. [2023-11-26 10:44:38,289 INFO L78 Accepts]: Start accepts. Automaton has 11205 states and 18419 transitions. Word has length 501 [2023-11-26 10:44:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:38,290 INFO L495 AbstractCegarLoop]: Abstraction has 11205 states and 18419 transitions. [2023-11-26 10:44:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11205 states and 18419 transitions. [2023-11-26 10:44:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-26 10:44:38,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:38,301 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:38,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:44:38,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:38,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1735782550, now seen corresponding path program 1 times [2023-11-26 10:44:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957274094] [2023-11-26 10:44:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:38,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:38,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242236518] [2023-11-26 10:44:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:38,570 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:38,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c378db-1092-4de2-a41c-f10a267bb6e9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:44:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:39,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:39,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-11-26 10:44:46,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:46,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957274094] [2023-11-26 10:44:46,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242236518] [2023-11-26 10:44:46,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242236518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:46,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:46,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:46,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781406529] [2023-11-26 10:44:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:44:46,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:44:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:44:46,071 INFO L87 Difference]: Start difference. First operand 11205 states and 18419 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 1 states have call successors, (81), 1 states have call predecessors, (81), 1 states have return successors, (81), 1 states have call predecessors, (81), 1 states have call successors, (81) [2023-11-26 10:44:50,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]