./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.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_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/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_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/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_731eb169-8513-4722-bd42-74af7d886537/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 dc938a0405ab980f73e24a449c4c9df5a56aedb0c7fd21047d768606a1a4d267 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:30,617 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:30,691 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:30,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:30,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:30,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:30,726 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:30,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:30,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:30,728 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:30,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:30,729 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:30,729 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:30,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:30,730 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:30,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:30,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:30,732 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:30,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:30,733 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:30,733 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:30,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:30,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:30,735 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:30,735 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:30,736 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:30,736 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:30,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:30,737 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:30,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:30,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:30,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:30,738 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:30,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:30,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:30,739 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:30,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:30,739 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:30,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:30,740 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:30,740 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:30,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:30,741 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_731eb169-8513-4722-bd42-74af7d886537/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc938a0405ab980f73e24a449c4c9df5a56aedb0c7fd21047d768606a1a4d267 [2023-11-26 12:00:31,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:31,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:31,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:31,108 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:31,108 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:31,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.i [2023-11-26 12:00:34,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:34,474 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:34,475 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.i [2023-11-26 12:00:34,487 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/data/15c4cc7b9/9bc2d3e46c21436d8b9f12bdbc9686cb/FLAG85f3a62a7 [2023-11-26 12:00:34,785 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/data/15c4cc7b9/9bc2d3e46c21436d8b9f12bdbc9686cb [2023-11-26 12:00:34,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:34,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:34,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:34,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:34,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:34,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:34" (1/1) ... [2023-11-26 12:00:34,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3098669f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:34, skipping insertion in model container [2023-11-26 12:00:34,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:34" (1/1) ... [2023-11-26 12:00:34,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:34,986 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_731eb169-8513-4722-bd42-74af7d886537/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.i[916,929] [2023-11-26 12:00:35,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:35,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:35,131 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_731eb169-8513-4722-bd42-74af7d886537/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-60.i[916,929] [2023-11-26 12:00:35,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:35,253 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:35,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35 WrapperNode [2023-11-26 12:00:35,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:35,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:35,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:35,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:35,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,336 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 382 [2023-11-26 12:00:35,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:35,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:35,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:35,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:35,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,354 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,375 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 12:00:35,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:35,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:35,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:35,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:35,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (1/1) ... [2023-11-26 12:00:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:35,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:35,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:35,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:35,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:00:35,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:00:35,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:35,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:35,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:35,680 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:35,682 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:36,339 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:36,408 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:36,409 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:00:36,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:36 BoogieIcfgContainer [2023-11-26 12:00:36,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:36,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:36,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:36,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:36,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:34" (1/3) ... [2023-11-26 12:00:36,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb9e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:36, skipping insertion in model container [2023-11-26 12:00:36,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:35" (2/3) ... [2023-11-26 12:00:36,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb9e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:36, skipping insertion in model container [2023-11-26 12:00:36,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:36" (3/3) ... [2023-11-26 12:00:36,419 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-60.i [2023-11-26 12:00:36,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:36,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:36,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:36,502 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;@48331eab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:36,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:00:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 88 states have internal predecessors, (131), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 12:00:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-26 12:00:36,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:36,537 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:36,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:36,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2106261794, now seen corresponding path program 1 times [2023-11-26 12:00:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901133442] [2023-11-26 12:00:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:36,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:36,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901133442] [2023-11-26 12:00:36,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:00:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942300883] [2023-11-26 12:00:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:36,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:36,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:36,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:37,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:00:37,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2023-11-26 12:00:37,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942300883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:37,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:37,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530938524] [2023-11-26 12:00:37,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:00:37,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:00:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:37,483 INFO L87 Difference]: Start difference. First operand has 146 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 88 states have internal predecessors, (131), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-26 12:00:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:37,571 INFO L93 Difference]: Finished difference Result 289 states and 540 transitions. [2023-11-26 12:00:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:00:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) Word has length 343 [2023-11-26 12:00:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:37,589 INFO L225 Difference]: With dead ends: 289 [2023-11-26 12:00:37,589 INFO L226 Difference]: Without dead ends: 144 [2023-11-26 12:00:37,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 342 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 12:00:37,599 INFO L413 NwaCegarLoop]: 234 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, 234 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 12:00:37,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 234 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-26 12:00:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-26 12:00:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 86 states have internal predecessors, (125), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 12:00:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 237 transitions. [2023-11-26 12:00:37,687 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 237 transitions. Word has length 343 [2023-11-26 12:00:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:37,688 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 237 transitions. [2023-11-26 12:00:37,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-26 12:00:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 237 transitions. [2023-11-26 12:00:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-26 12:00:37,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:37,700 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:37,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:37,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:00:37,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:37,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1563175322, now seen corresponding path program 1 times [2023-11-26 12:00:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:37,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646079008] [2023-11-26 12:00:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:38,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59732953] [2023-11-26 12:00:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:38,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:38,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:38,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:38,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:00:38,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 12:00:38,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:38,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646079008] [2023-11-26 12:00:38,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:38,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59732953] [2023-11-26 12:00:38,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59732953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:38,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:38,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270840504] [2023-11-26 12:00:38,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:38,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:38,470 INFO L87 Difference]: Start difference. First operand 144 states and 237 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:38,564 INFO L93 Difference]: Finished difference Result 320 states and 522 transitions. [2023-11-26 12:00:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 343 [2023-11-26 12:00:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:38,571 INFO L225 Difference]: With dead ends: 320 [2023-11-26 12:00:38,571 INFO L226 Difference]: Without dead ends: 177 [2023-11-26 12:00:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 12:00:38,575 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 48 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:38,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 505 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-26 12:00:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2023-11-26 12:00:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 103 states have (on average 1.4271844660194175) internal successors, (147), 104 states have internal predecessors, (147), 68 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 12:00:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 283 transitions. [2023-11-26 12:00:38,620 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 283 transitions. Word has length 343 [2023-11-26 12:00:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:38,622 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 283 transitions. [2023-11-26 12:00:38,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 283 transitions. [2023-11-26 12:00:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:38,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:38,628 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:38,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:38,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:38,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 199421311, now seen corresponding path program 1 times [2023-11-26 12:00:38,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:38,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138652860] [2023-11-26 12:00:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:38,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:38,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887496562] [2023-11-26 12:00:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:38,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:38,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:39,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:39,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:00:39,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 12:00:39,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138652860] [2023-11-26 12:00:39,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887496562] [2023-11-26 12:00:39,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887496562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:39,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:39,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183084897] [2023-11-26 12:00:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:39,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:39,431 INFO L87 Difference]: Start difference. First operand 174 states and 283 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:39,482 INFO L93 Difference]: Finished difference Result 365 states and 591 transitions. [2023-11-26 12:00:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 344 [2023-11-26 12:00:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:39,490 INFO L225 Difference]: With dead ends: 365 [2023-11-26 12:00:39,490 INFO L226 Difference]: Without dead ends: 192 [2023-11-26 12:00:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 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 12:00:39,493 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 12 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:39,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 461 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-26 12:00:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2023-11-26 12:00:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 112 states have internal predecessors, (158), 68 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 12:00:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 294 transitions. [2023-11-26 12:00:39,531 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 294 transitions. Word has length 344 [2023-11-26 12:00:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:39,533 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 294 transitions. [2023-11-26 12:00:39,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 294 transitions. [2023-11-26 12:00:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:39,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:39,537 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:39,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:39,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:39,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1974428673, now seen corresponding path program 1 times [2023-11-26 12:00:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031922286] [2023-11-26 12:00:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:39,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:39,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868265779] [2023-11-26 12:00:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:39,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:39,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:39,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:40,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:00:40,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 1329 proven. 18 refuted. 0 times theorem prover too weak. 4813 trivial. 0 not checked. [2023-11-26 12:00:40,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 147 proven. 18 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 12:00:41,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:41,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031922286] [2023-11-26 12:00:41,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:41,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868265779] [2023-11-26 12:00:41,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868265779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:41,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:41,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-26 12:00:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634698141] [2023-11-26 12:00:41,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:41,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:00:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:00:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:00:41,153 INFO L87 Difference]: Start difference. First operand 182 states and 294 transitions. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-26 12:00:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:44,330 INFO L93 Difference]: Finished difference Result 995 states and 1579 transitions. [2023-11-26 12:00:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 12:00:44,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) Word has length 344 [2023-11-26 12:00:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:44,340 INFO L225 Difference]: With dead ends: 995 [2023-11-26 12:00:44,340 INFO L226 Difference]: Without dead ends: 814 [2023-11-26 12:00:44,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=619, Invalid=1733, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 12:00:44,348 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 1338 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:44,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1409 Valid, 1086 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-26 12:00:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-11-26 12:00:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 331. [2023-11-26 12:00:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 223 states have (on average 1.493273542600897) internal successors, (333), 226 states have internal predecessors, (333), 102 states have call successors, (102), 5 states have call predecessors, (102), 5 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-26 12:00:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 537 transitions. [2023-11-26 12:00:44,479 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 537 transitions. Word has length 344 [2023-11-26 12:00:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:44,480 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 537 transitions. [2023-11-26 12:00:44,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-26 12:00:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 537 transitions. [2023-11-26 12:00:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:44,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:44,486 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:44,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 12:00:44,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:44,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:44,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash 963311423, now seen corresponding path program 1 times [2023-11-26 12:00:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:44,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492569833] [2023-11-26 12:00:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:44,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536003122] [2023-11-26 12:00:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:44,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:44,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:44,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:45,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:00:45,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 12:00:45,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:45,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:45,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492569833] [2023-11-26 12:00:45,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536003122] [2023-11-26 12:00:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536003122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:45,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717798743] [2023-11-26 12:00:45,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:45,495 INFO L87 Difference]: Start difference. First operand 331 states and 537 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:45,592 INFO L93 Difference]: Finished difference Result 870 states and 1407 transitions. [2023-11-26 12:00:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 344 [2023-11-26 12:00:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:45,598 INFO L225 Difference]: With dead ends: 870 [2023-11-26 12:00:45,599 INFO L226 Difference]: Without dead ends: 540 [2023-11-26 12:00:45,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 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 12:00:45,601 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 80 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:45,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 460 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-11-26 12:00:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 537. [2023-11-26 12:00:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 357 states have (on average 1.4705882352941178) internal successors, (525), 361 states have internal predecessors, (525), 170 states have call successors, (170), 9 states have call predecessors, (170), 9 states have return successors, (170), 166 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-26 12:00:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 865 transitions. [2023-11-26 12:00:45,709 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 865 transitions. Word has length 344 [2023-11-26 12:00:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:45,710 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 865 transitions. [2023-11-26 12:00:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 865 transitions. [2023-11-26 12:00:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:45,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:45,714 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:45,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:45,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:45,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:45,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1025351037, now seen corresponding path program 1 times [2023-11-26 12:00:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561395160] [2023-11-26 12:00:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:46,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993011498] [2023-11-26 12:00:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:46,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:46,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:00:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:46,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:00:46,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 1329 proven. 18 refuted. 0 times theorem prover too weak. 4813 trivial. 0 not checked. [2023-11-26 12:00:46,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 147 proven. 18 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 12:00:46,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:46,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561395160] [2023-11-26 12:00:46,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:46,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993011498] [2023-11-26 12:00:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993011498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:46,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:46,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 12:00:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967904034] [2023-11-26 12:00:46,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:46,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:46,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:46,850 INFO L87 Difference]: Start difference. First operand 537 states and 865 transitions. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-26 12:00:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:48,819 INFO L93 Difference]: Finished difference Result 1717 states and 2756 transitions. [2023-11-26 12:00:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 12:00:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) Word has length 344 [2023-11-26 12:00:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:48,831 INFO L225 Difference]: With dead ends: 1717 [2023-11-26 12:00:48,831 INFO L226 Difference]: Without dead ends: 1181 [2023-11-26 12:00:48,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2023-11-26 12:00:48,835 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 726 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:48,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1042 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 12:00:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2023-11-26 12:00:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1015. [2023-11-26 12:00:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 672 states have (on average 1.4657738095238095) internal successors, (985), 682 states have internal predecessors, (985), 326 states have call successors, (326), 16 states have call predecessors, (326), 16 states have return successors, (326), 316 states have call predecessors, (326), 326 states have call successors, (326) [2023-11-26 12:00:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1637 transitions. [2023-11-26 12:00:49,041 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1637 transitions. Word has length 344 [2023-11-26 12:00:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:49,043 INFO L495 AbstractCegarLoop]: Abstraction has 1015 states and 1637 transitions. [2023-11-26 12:00:49,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-26 12:00:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1637 transitions. [2023-11-26 12:00:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:49,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:49,049 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:49,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:00:49,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:49,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -556168335, now seen corresponding path program 1 times [2023-11-26 12:00:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:49,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300232965] [2023-11-26 12:00:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:49,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:49,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796846941] [2023-11-26 12:00:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:49,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:49,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:00:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:49,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:49,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 12:00:49,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:49,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300232965] [2023-11-26 12:00:49,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:49,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796846941] [2023-11-26 12:00:49,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796846941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:49,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:49,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:00:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616339397] [2023-11-26 12:00:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:49,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:00:49,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:00:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:49,681 INFO L87 Difference]: Start difference. First operand 1015 states and 1637 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:50,198 INFO L93 Difference]: Finished difference Result 2798 states and 4508 transitions. [2023-11-26 12:00:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:50,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 344 [2023-11-26 12:00:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:50,213 INFO L225 Difference]: With dead ends: 2798 [2023-11-26 12:00:50,214 INFO L226 Difference]: Without dead ends: 1784 [2023-11-26 12:00:50,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:50,219 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 152 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:50,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1077 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2023-11-26 12:00:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1772. [2023-11-26 12:00:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1195 states have (on average 1.4686192468619246) internal successors, (1755), 1217 states have internal predecessors, (1755), 546 states have call successors, (546), 30 states have call predecessors, (546), 30 states have return successors, (546), 524 states have call predecessors, (546), 546 states have call successors, (546) [2023-11-26 12:00:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2847 transitions. [2023-11-26 12:00:50,503 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2847 transitions. Word has length 344 [2023-11-26 12:00:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:50,504 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 2847 transitions. [2023-11-26 12:00:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 12:00:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2847 transitions. [2023-11-26 12:00:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 12:00:50,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:50,510 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:50,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 12:00:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:50,717 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:50,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1567285585, now seen corresponding path program 1 times [2023-11-26 12:00:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852110576] [2023-11-26 12:00:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:50,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:50,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698068719] [2023-11-26 12:00:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:50,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:50,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:50,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:50,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731eb169-8513-4722-bd42-74af7d886537/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:00:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:51,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 12:00:51,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3110 proven. 153 refuted. 0 times theorem prover too weak. 2897 trivial. 0 not checked. [2023-11-26 12:00:52,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 324 proven. 162 refuted. 0 times theorem prover too weak. 5674 trivial. 0 not checked. [2023-11-26 12:01:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852110576] [2023-11-26 12:01:07,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698068719] [2023-11-26 12:01:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698068719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:07,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:01:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-26 12:01:07,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557694872] [2023-11-26 12:01:07,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:01:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:01:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:01:08,003 INFO L87 Difference]: Start difference. First operand 1772 states and 2847 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 7 states have call successors, (76), 4 states have call predecessors, (76), 10 states have return successors, (77), 7 states have call predecessors, (77), 7 states have call successors, (77) [2023-11-26 12:01:09,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []