./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba821d92d2796d52ea5c7f089d2638cf5b82e930c6cce78adee479c044ea4833 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:59:56,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:59:56,993 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:59:56,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:59:57,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:59:57,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:59:57,027 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:59:57,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:59:57,028 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:59:57,029 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:59:57,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:59:57,030 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:59:57,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:59:57,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:59:57,032 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:59:57,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:59:57,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:59:57,033 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:59:57,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:59:57,034 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:59:57,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:59:57,035 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:59:57,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:59:57,036 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:59:57,037 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:59:57,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:59:57,038 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:59:57,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:59:57,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:59:57,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:59:57,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:59:57,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:59:57,040 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:59:57,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:59:57,041 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:59:57,041 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:59:57,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:59:57,041 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:59:57,042 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:59:57,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:59:57,042 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:59:57,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:59:57,042 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_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba821d92d2796d52ea5c7f089d2638cf5b82e930c6cce78adee479c044ea4833 [2023-11-29 01:59:57,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:59:57,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:59:57,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:59:57,286 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:59:57,286 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:59:57,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i [2023-11-29 02:00:00,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:00:00,360 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:00:00,361 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i [2023-11-29 02:00:00,374 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/data/b159c20a3/2e5ba12a560f43c9b313a75763e8faa7/FLAG539a5d92c [2023-11-29 02:00:00,389 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/data/b159c20a3/2e5ba12a560f43c9b313a75763e8faa7 [2023-11-29 02:00:00,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:00:00,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:00:00,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:00:00,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:00:00,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:00:00,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269db29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00, skipping insertion in model container [2023-11-29 02:00:00,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,455 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:00:00,594 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_fb812b3a-1615-40cc-b6b5-178c2ded5619/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i[916,929] [2023-11-29 02:00:00,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:00:00,750 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:00:00,761 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_fb812b3a-1615-40cc-b6b5-178c2ded5619/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-37.i[916,929] [2023-11-29 02:00:00,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:00:00,849 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:00:00,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00 WrapperNode [2023-11-29 02:00:00,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:00:00,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:00:00,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:00:00,851 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:00:00,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,937 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 380 [2023-11-29 02:00:00,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:00:00,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:00:00,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:00:00,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:00:00,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:00,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,034 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:00:01,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:00:01,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:00:01,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:00:01,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:00:01,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (1/1) ... [2023-11-29 02:00:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:00:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:01,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:00:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:00:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:00:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:00:01,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:00:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:00:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:00:01,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:00:01,272 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:00:01,275 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:00:01,940 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:00:01,999 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:00:01,999 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:00:02,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:00:01 BoogieIcfgContainer [2023-11-29 02:00:02,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:00:02,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:00:02,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:00:02,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:00:02,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:00:00" (1/3) ... [2023-11-29 02:00:02,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18242ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:00:02, skipping insertion in model container [2023-11-29 02:00:02,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:00" (2/3) ... [2023-11-29 02:00:02,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18242ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:00:02, skipping insertion in model container [2023-11-29 02:00:02,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:00:01" (3/3) ... [2023-11-29 02:00:02,009 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-37.i [2023-11-29 02:00:02,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:00:02,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:00:02,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:00:02,088 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;@77cce02f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:00:02,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:00:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 98 states have (on average 1.510204081632653) internal successors, (148), 99 states have internal predecessors, (148), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-29 02:00:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-29 02:00:02,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:02,115 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:02,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:02,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1627092463, now seen corresponding path program 1 times [2023-11-29 02:00:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906755344] [2023-11-29 02:00:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:02,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437913098] [2023-11-29 02:00:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:02,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:00:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:02,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:00:02,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 4332 trivial. 0 not checked. [2023-11-29 02:00:05,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906755344] [2023-11-29 02:00:05,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437913098] [2023-11-29 02:00:05,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437913098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:05,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:05,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:00:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397463007] [2023-11-29 02:00:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:00:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:00:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:00:05,530 INFO L87 Difference]: Start difference. First operand has 152 states, 98 states have (on average 1.510204081632653) internal successors, (148), 99 states have internal predecessors, (148), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-29 02:00:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:06,210 INFO L93 Difference]: Finished difference Result 482 states and 901 transitions. [2023-11-29 02:00:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:00:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 329 [2023-11-29 02:00:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:06,228 INFO L225 Difference]: With dead ends: 482 [2023-11-29 02:00:06,229 INFO L226 Difference]: Without dead ends: 331 [2023-11-29 02:00:06,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:00:06,239 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 605 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:06,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 774 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:00:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-29 02:00:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 296. [2023-11-29 02:00:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 191 states have (on average 1.4712041884816753) internal successors, (281), 191 states have internal predecessors, (281), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-29 02:00:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 485 transitions. [2023-11-29 02:00:06,363 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 485 transitions. Word has length 329 [2023-11-29 02:00:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:06,366 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 485 transitions. [2023-11-29 02:00:06,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-11-29 02:00:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 485 transitions. [2023-11-29 02:00:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-29 02:00:06,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:06,376 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:06,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:00:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:00:06,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:06,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash 673730127, now seen corresponding path program 1 times [2023-11-29 02:00:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914363588] [2023-11-29 02:00:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:06,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535680600] [2023-11-29 02:00:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:06,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:00:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:06,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:00:06,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-29 02:00:06,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:06,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914363588] [2023-11-29 02:00:06,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535680600] [2023-11-29 02:00:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535680600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:06,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:06,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:00:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402381886] [2023-11-29 02:00:06,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:06,972 INFO L87 Difference]: Start difference. First operand 296 states and 485 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-29 02:00:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:07,514 INFO L93 Difference]: Finished difference Result 1236 states and 2017 transitions. [2023-11-29 02:00:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:00:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 329 [2023-11-29 02:00:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:07,526 INFO L225 Difference]: With dead ends: 1236 [2023-11-29 02:00:07,526 INFO L226 Difference]: Without dead ends: 941 [2023-11-29 02:00:07,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:00:07,531 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 485 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:07,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1259 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:00:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-11-29 02:00:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 931. [2023-11-29 02:00:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 638 states have (on average 1.4827586206896552) internal successors, (946), 642 states have internal predecessors, (946), 284 states have call successors, (284), 8 states have call predecessors, (284), 8 states have return successors, (284), 280 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:00:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1514 transitions. [2023-11-29 02:00:07,683 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1514 transitions. Word has length 329 [2023-11-29 02:00:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:07,684 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1514 transitions. [2023-11-29 02:00:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-29 02:00:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1514 transitions. [2023-11-29 02:00:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-29 02:00:07,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:07,692 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:07,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:00:07,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:07,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:07,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1570253171, now seen corresponding path program 1 times [2023-11-29 02:00:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:07,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678457965] [2023-11-29 02:00:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:07,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:07,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109576930] [2023-11-29 02:00:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:07,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:07,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:00:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:08,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:00:08,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-29 02:00:08,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:08,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678457965] [2023-11-29 02:00:08,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109576930] [2023-11-29 02:00:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109576930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:00:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107937499] [2023-11-29 02:00:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:00:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:00:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:00:08,335 INFO L87 Difference]: Start difference. First operand 931 states and 1514 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-29 02:00:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:08,975 INFO L93 Difference]: Finished difference Result 5007 states and 8072 transitions. [2023-11-29 02:00:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:00:08,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 329 [2023-11-29 02:00:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:09,011 INFO L225 Difference]: With dead ends: 5007 [2023-11-29 02:00:09,011 INFO L226 Difference]: Without dead ends: 4077 [2023-11-29 02:00:09,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:00:09,018 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 804 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:09,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 1008 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:00:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2023-11-29 02:00:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3395. [2023-11-29 02:00:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2602 states have (on average 1.5042275172943889) internal successors, (3914), 2626 states have internal predecessors, (3914), 760 states have call successors, (760), 32 states have call predecessors, (760), 32 states have return successors, (760), 736 states have call predecessors, (760), 760 states have call successors, (760) [2023-11-29 02:00:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5434 transitions. [2023-11-29 02:00:09,399 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5434 transitions. Word has length 329 [2023-11-29 02:00:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:09,400 INFO L495 AbstractCegarLoop]: Abstraction has 3395 states and 5434 transitions. [2023-11-29 02:00:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-29 02:00:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5434 transitions. [2023-11-29 02:00:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-29 02:00:09,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:09,409 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:09,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:00:09,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:09,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:09,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash -150012339, now seen corresponding path program 1 times [2023-11-29 02:00:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048684967] [2023-11-29 02:00:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:09,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572865759] [2023-11-29 02:00:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:09,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:09,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:09,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:00:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:09,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:00:09,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1898 proven. 114 refuted. 0 times theorem prover too weak. 3088 trivial. 0 not checked. [2023-11-29 02:00:10,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 36 proven. 114 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-29 02:00:10,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048684967] [2023-11-29 02:00:10,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572865759] [2023-11-29 02:00:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572865759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:10,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:00:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:00:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319308883] [2023-11-29 02:00:10,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:00:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:00:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:00:10,558 INFO L87 Difference]: Start difference. First operand 3395 states and 5434 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 02:00:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:11,047 INFO L93 Difference]: Finished difference Result 4565 states and 7227 transitions. [2023-11-29 02:00:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:00:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 329 [2023-11-29 02:00:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:11,060 INFO L225 Difference]: With dead ends: 4565 [2023-11-29 02:00:11,060 INFO L226 Difference]: Without dead ends: 1171 [2023-11-29 02:00:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 650 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:00:11,070 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 125 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:11,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 427 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:00:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-29 02:00:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1155. [2023-11-29 02:00:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 846 states have (on average 1.425531914893617) internal successors, (1206), 850 states have internal predecessors, (1206), 284 states have call successors, (284), 24 states have call predecessors, (284), 24 states have return successors, (284), 280 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 02:00:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1774 transitions. [2023-11-29 02:00:11,248 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1774 transitions. Word has length 329 [2023-11-29 02:00:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:11,249 INFO L495 AbstractCegarLoop]: Abstraction has 1155 states and 1774 transitions. [2023-11-29 02:00:11,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 02:00:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1774 transitions. [2023-11-29 02:00:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-29 02:00:11,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:11,255 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:11,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:00:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:11,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:11,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 503197628, now seen corresponding path program 1 times [2023-11-29 02:00:11,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:11,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609588123] [2023-11-29 02:00:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:11,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:11,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671485359] [2023-11-29 02:00:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:11,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:00:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:11,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:00:11,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 87 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2023-11-29 02:00:12,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-29 02:00:12,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:12,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609588123] [2023-11-29 02:00:12,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671485359] [2023-11-29 02:00:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671485359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:12,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:00:12,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:00:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30238176] [2023-11-29 02:00:12,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:12,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:00:12,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:00:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:00:12,340 INFO L87 Difference]: Start difference. First operand 1155 states and 1774 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-29 02:00:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:12,704 INFO L93 Difference]: Finished difference Result 1883 states and 2883 transitions. [2023-11-29 02:00:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:00:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 330 [2023-11-29 02:00:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:12,714 INFO L225 Difference]: With dead ends: 1883 [2023-11-29 02:00:12,714 INFO L226 Difference]: Without dead ends: 729 [2023-11-29 02:00:12,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 652 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:00:12,719 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 244 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:12,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 432 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:00:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-11-29 02:00:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 713. [2023-11-29 02:00:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 492 states have (on average 1.3780487804878048) internal successors, (678), 492 states have internal predecessors, (678), 204 states have call successors, (204), 16 states have call predecessors, (204), 16 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-29 02:00:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1086 transitions. [2023-11-29 02:00:12,811 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1086 transitions. Word has length 330 [2023-11-29 02:00:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:12,812 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1086 transitions. [2023-11-29 02:00:12,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-29 02:00:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1086 transitions. [2023-11-29 02:00:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-29 02:00:12,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:12,816 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:12,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:00:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:13,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:13,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2134571233, now seen corresponding path program 1 times [2023-11-29 02:00:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:13,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610915722] [2023-11-29 02:00:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:13,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:13,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:13,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809249440] [2023-11-29 02:00:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:13,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:13,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:13,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:00:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:13,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:00:13,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2390 proven. 96 refuted. 0 times theorem prover too weak. 2614 trivial. 0 not checked. [2023-11-29 02:00:13,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 54 proven. 96 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-29 02:00:14,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610915722] [2023-11-29 02:00:14,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809249440] [2023-11-29 02:00:14,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809249440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:14,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:00:14,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 02:00:14,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025247680] [2023-11-29 02:00:14,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:14,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:00:14,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:00:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:00:14,057 INFO L87 Difference]: Start difference. First operand 713 states and 1086 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 02:00:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:15,333 INFO L93 Difference]: Finished difference Result 2945 states and 4425 transitions. [2023-11-29 02:00:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:00:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 331 [2023-11-29 02:00:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:15,351 INFO L225 Difference]: With dead ends: 2945 [2023-11-29 02:00:15,351 INFO L226 Difference]: Without dead ends: 2233 [2023-11-29 02:00:15,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 654 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:00:15,356 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 602 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:15,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1155 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:00:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2023-11-29 02:00:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1455. [2023-11-29 02:00:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1006 states have (on average 1.3538767395626243) internal successors, (1362), 1006 states have internal predecessors, (1362), 408 states have call successors, (408), 40 states have call predecessors, (408), 40 states have return successors, (408), 408 states have call predecessors, (408), 408 states have call successors, (408) [2023-11-29 02:00:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2178 transitions. [2023-11-29 02:00:15,631 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2178 transitions. Word has length 331 [2023-11-29 02:00:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:15,632 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2178 transitions. [2023-11-29 02:00:15,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 02:00:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2178 transitions. [2023-11-29 02:00:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-29 02:00:15,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:15,636 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:15,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:00:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:00:15,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:15,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 280975137, now seen corresponding path program 1 times [2023-11-29 02:00:15,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:15,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61731730] [2023-11-29 02:00:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:15,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:15,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:15,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831823412] [2023-11-29 02:00:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:15,886 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:15,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb812b3a-1615-40cc-b6b5-178c2ded5619/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:00:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:16,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:00:16,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 628 proven. 144 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2023-11-29 02:06:10,402 INFO L327 TraceCheckSpWp]: Computing backward predicates...