./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl --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 cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:11:00,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:11:00,520 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:11:00,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:11:00,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:11:00,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:11:00,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:11:00,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:11:00,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:11:00,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:11:00,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:11:00,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:11:00,589 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:11:00,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:11:00,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:11:00,592 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:11:00,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:11:00,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:11:00,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:11:00,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:11:00,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:11:00,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:11:00,596 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:11:00,596 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:11:00,597 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:11:00,598 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:11:00,598 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:11:00,599 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:11:00,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:00,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:11:00,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:11:00,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:11:00,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:11:00,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:11:00,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:11:00,603 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:11:00,603 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:11:00,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:11:00,604 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:11:00,604 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_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 [2023-11-12 02:11:00,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:11:00,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:11:00,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:11:00,963 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:11:00,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:11:00,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-12 02:11:04,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:11:04,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:11:04,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-12 02:11:04,522 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/data/a8c5a6719/5361ec08da8e40fd88ef41e800ae8f5b/FLAG108e3e716 [2023-11-12 02:11:04,544 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/data/a8c5a6719/5361ec08da8e40fd88ef41e800ae8f5b [2023-11-12 02:11:04,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:11:04,549 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:11:04,550 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:04,551 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:11:04,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:11:04,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:04" (1/1) ... [2023-11-12 02:11:04,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9c0b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:04, skipping insertion in model container [2023-11-12 02:11:04,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:04" (1/1) ... [2023-11-12 02:11:04,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:11:04,798 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_3d5b92db-2575-4d73-b527-8c6d23aae41e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-12 02:11:04,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:05,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:11:05,027 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_3d5b92db-2575-4d73-b527-8c6d23aae41e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-12 02:11:05,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:05,198 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:11:05,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05 WrapperNode [2023-11-12 02:11:05,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:05,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:05,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:11:05,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:11:05,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,301 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 450 [2023-11-12 02:11:05,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:05,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:11:05,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:11:05,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:11:05,313 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:11:05,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:11:05,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:11:05,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:11:05,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (1/1) ... [2023-11-12 02:11:05,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:05,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:11:05,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:11:05,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:11:05,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:11:05,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:11:05,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:11:05,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:11:05,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:11:05,734 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:11:05,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:11:06,896 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:11:06,906 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:11:06,907 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:11:06,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:06 BoogieIcfgContainer [2023-11-12 02:11:06,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:11:06,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:11:06,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:11:06,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:11:06,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:11:04" (1/3) ... [2023-11-12 02:11:06,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5bea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:06, skipping insertion in model container [2023-11-12 02:11:06,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:05" (2/3) ... [2023-11-12 02:11:06,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5bea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:06, skipping insertion in model container [2023-11-12 02:11:06,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:06" (3/3) ... [2023-11-12 02:11:06,921 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-27.i [2023-11-12 02:11:06,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:11:06,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:11:07,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:11:07,007 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;@6dabe0b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:11:07,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:11:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 130 states have (on average 1.523076923076923) internal successors, (198), 131 states have internal predecessors, (198), 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) [2023-11-12 02:11:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-11-12 02:11:07,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:07,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:07,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:07,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1133111130, now seen corresponding path program 1 times [2023-11-12 02:11:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:07,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699885487] [2023-11-12 02:11:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:07,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699885487] [2023-11-12 02:11:07,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:11:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957444471] [2023-11-12 02:11:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:07,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:07,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:11:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:07,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:11:07,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-12 02:11:08,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957444471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:08,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:08,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964185655] [2023-11-12 02:11:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:08,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:11:08,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:11:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:11:08,148 INFO L87 Difference]: Start difference. First operand has 184 states, 130 states have (on average 1.523076923076923) internal successors, (198), 131 states have internal predecessors, (198), 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 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-12 02:11:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:08,214 INFO L93 Difference]: Finished difference Result 360 states and 643 transitions. [2023-11-12 02:11:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:11:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 340 [2023-11-12 02:11:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:08,229 INFO L225 Difference]: With dead ends: 360 [2023-11-12 02:11:08,229 INFO L226 Difference]: Without dead ends: 179 [2023-11-12 02:11:08,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:11:08,239 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:08,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-12 02:11:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-12 02:11:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 126 states have internal predecessors, (187), 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) [2023-11-12 02:11:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 289 transitions. [2023-11-12 02:11:08,318 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 289 transitions. Word has length 340 [2023-11-12 02:11:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:08,318 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 289 transitions. [2023-11-12 02:11:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-12 02:11:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 289 transitions. [2023-11-12 02:11:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2023-11-12 02:11:08,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:08,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:08,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:08,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:11:08,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash 719381412, now seen corresponding path program 1 times [2023-11-12 02:11:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798445247] [2023-11-12 02:11:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:08,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916583251] [2023-11-12 02:11:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:08,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:08,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:08,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:11:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:09,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:11:09,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-12 02:11:09,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:09,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798445247] [2023-11-12 02:11:09,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:09,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916583251] [2023-11-12 02:11:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916583251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:09,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:09,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:11:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564757577] [2023-11-12 02:11:09,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:11:09,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:11:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:11:09,930 INFO L87 Difference]: Start difference. First operand 179 states and 289 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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) [2023-11-12 02:11:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:11,918 INFO L93 Difference]: Finished difference Result 1058 states and 1726 transitions. [2023-11-12 02:11:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:11:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 341 [2023-11-12 02:11:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:11,937 INFO L225 Difference]: With dead ends: 1058 [2023-11-12 02:11:11,937 INFO L226 Difference]: Without dead ends: 882 [2023-11-12 02:11:11,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:11:11,942 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1236 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:11,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 2659 Invalid, 1256 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [148 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 02:11:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-11-12 02:11:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 336. [2023-11-12 02:11:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 231 states have (on average 1.4415584415584415) internal successors, (333), 231 states have internal predecessors, (333), 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) [2023-11-12 02:11:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 537 transitions. [2023-11-12 02:11:12,063 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 537 transitions. Word has length 341 [2023-11-12 02:11:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:12,065 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 537 transitions. [2023-11-12 02:11:12,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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) [2023-11-12 02:11:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 537 transitions. [2023-11-12 02:11:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2023-11-12 02:11:12,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:12,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:12,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:12,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:12,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 742013666, now seen corresponding path program 1 times [2023-11-12 02:11:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:12,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726572676] [2023-11-12 02:11:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:12,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890345233] [2023-11-12 02:11:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:12,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:12,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:12,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:12,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:11:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:12,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:11:12,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2468 proven. 57 refuted. 0 times theorem prover too weak. 2575 trivial. 0 not checked. [2023-11-12 02:11:14,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-12 02:11:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726572676] [2023-11-12 02:11:14,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890345233] [2023-11-12 02:11:14,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890345233] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:14,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:14,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-12 02:11:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389252139] [2023-11-12 02:11:14,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:11:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:11:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:11:14,640 INFO L87 Difference]: Start difference. First operand 336 states and 537 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-12 02:11:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:15,314 INFO L93 Difference]: Finished difference Result 884 states and 1412 transitions. [2023-11-12 02:11:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 341 [2023-11-12 02:11:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:15,331 INFO L225 Difference]: With dead ends: 884 [2023-11-12 02:11:15,331 INFO L226 Difference]: Without dead ends: 644 [2023-11-12 02:11:15,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:15,334 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 443 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1214 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:11:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-12 02:11:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 536. [2023-11-12 02:11:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 399 states have (on average 1.493734335839599) internal successors, (596), 400 states have internal predecessors, (596), 132 states have call successors, (132), 4 states have call predecessors, (132), 4 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-12 02:11:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 860 transitions. [2023-11-12 02:11:15,432 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 860 transitions. Word has length 341 [2023-11-12 02:11:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:15,437 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 860 transitions. [2023-11-12 02:11:15,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-12 02:11:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 860 transitions. [2023-11-12 02:11:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-11-12 02:11:15,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:15,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:15,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:15,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:15,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -611411036, now seen corresponding path program 1 times [2023-11-12 02:11:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096036213] [2023-11-12 02:11:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:15,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:15,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119716790] [2023-11-12 02:11:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:15,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:15,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:15,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:15,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:11:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:16,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:11:16,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-12 02:11:16,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096036213] [2023-11-12 02:11:16,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119716790] [2023-11-12 02:11:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119716790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:16,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:11:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550512388] [2023-11-12 02:11:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:11:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:11:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:11:16,150 INFO L87 Difference]: Start difference. First operand 536 states and 860 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (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) [2023-11-12 02:11:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:16,493 INFO L93 Difference]: Finished difference Result 1187 states and 1903 transitions. [2023-11-12 02:11:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:11:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (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 342 [2023-11-12 02:11:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:16,503 INFO L225 Difference]: With dead ends: 1187 [2023-11-12 02:11:16,503 INFO L226 Difference]: Without dead ends: 751 [2023-11-12 02:11:16,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:11:16,510 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 247 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:16,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 828 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:11:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-12 02:11:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 536. [2023-11-12 02:11:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 399 states have (on average 1.4611528822055138) internal successors, (583), 400 states have internal predecessors, (583), 132 states have call successors, (132), 4 states have call predecessors, (132), 4 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-12 02:11:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 847 transitions. [2023-11-12 02:11:16,607 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 847 transitions. Word has length 342 [2023-11-12 02:11:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:16,608 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 847 transitions. [2023-11-12 02:11:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (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) [2023-11-12 02:11:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 847 transitions. [2023-11-12 02:11:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-12 02:11:16,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:16,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:16,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:16,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:16,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1333381965, now seen corresponding path program 1 times [2023-11-12 02:11:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:16,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043705195] [2023-11-12 02:11:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:16,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264962011] [2023-11-12 02:11:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:16,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:16,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:11:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:17,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:11:17,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3155 proven. 192 refuted. 0 times theorem prover too weak. 1753 trivial. 0 not checked. [2023-11-12 02:11:18,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 102 proven. 195 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-12 02:11:19,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:19,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043705195] [2023-11-12 02:11:19,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:19,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264962011] [2023-11-12 02:11:19,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264962011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:19,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:11:19,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-12 02:11:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402130383] [2023-11-12 02:11:19,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:11:19,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:11:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:11:19,049 INFO L87 Difference]: Start difference. First operand 536 states and 847 transitions. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-12 02:11:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:20,124 INFO L93 Difference]: Finished difference Result 1323 states and 2069 transitions. [2023-11-12 02:11:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:11:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) Word has length 343 [2023-11-12 02:11:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:20,134 INFO L225 Difference]: With dead ends: 1323 [2023-11-12 02:11:20,134 INFO L226 Difference]: Without dead ends: 887 [2023-11-12 02:11:20,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 671 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:11:20,137 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 767 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:20,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 974 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:11:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-12 02:11:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 851. [2023-11-12 02:11:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 689 states have (on average 1.4702467343976777) internal successors, (1013), 692 states have internal predecessors, (1013), 148 states have call successors, (148), 13 states have call predecessors, (148), 13 states have return successors, (148), 145 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-12 02:11:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1309 transitions. [2023-11-12 02:11:20,236 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1309 transitions. Word has length 343 [2023-11-12 02:11:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:20,237 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1309 transitions. [2023-11-12 02:11:20,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-12 02:11:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1309 transitions. [2023-11-12 02:11:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-12 02:11:20,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:20,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:20,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:11:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:20,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:20,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2046571049, now seen corresponding path program 1 times [2023-11-12 02:11:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211844525] [2023-11-12 02:11:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:20,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337908509] [2023-11-12 02:11:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:20,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:20,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:11:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:20,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:11:20,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2810 proven. 207 refuted. 0 times theorem prover too weak. 2083 trivial. 0 not checked. [2023-11-12 02:11:21,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 87 proven. 210 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-12 02:11:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211844525] [2023-11-12 02:11:22,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337908509] [2023-11-12 02:11:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337908509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:22,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:11:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-12 02:11:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444463402] [2023-11-12 02:11:22,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:11:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:11:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:11:22,274 INFO L87 Difference]: Start difference. First operand 851 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-12 02:11:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:22,995 INFO L93 Difference]: Finished difference Result 1618 states and 2480 transitions. [2023-11-12 02:11:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:11:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 344 [2023-11-12 02:11:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:23,004 INFO L225 Difference]: With dead ends: 1618 [2023-11-12 02:11:23,004 INFO L226 Difference]: Without dead ends: 879 [2023-11-12 02:11:23,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 672 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:11:23,007 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 637 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:23,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 601 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:11:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-11-12 02:11:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 875. [2023-11-12 02:11:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 707 states have (on average 1.4526166902404527) internal successors, (1027), 710 states have internal predecessors, (1027), 148 states have call successors, (148), 19 states have call predecessors, (148), 19 states have return successors, (148), 145 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-12 02:11:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1323 transitions. [2023-11-12 02:11:23,087 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1323 transitions. Word has length 344 [2023-11-12 02:11:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:23,089 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1323 transitions. [2023-11-12 02:11:23,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.533333333333333) internal successors, (143), 15 states have internal predecessors, (143), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-12 02:11:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1323 transitions. [2023-11-12 02:11:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-12 02:11:23,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:23,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:23,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:11:23,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:23,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:23,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2000249753, now seen corresponding path program 1 times [2023-11-12 02:11:23,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:23,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384123250] [2023-11-12 02:11:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:23,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:23,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:11:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002683375] [2023-11-12 02:11:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:23,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:23,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5b92db-2575-4d73-b527-8c6d23aae41e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:11:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:23,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 02:11:23,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3746 proven. 297 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2023-11-12 02:11:28,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 393 proven. 327 refuted. 0 times theorem prover too weak. 4380 trivial. 0 not checked. [2023-11-12 02:11:33,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384123250] [2023-11-12 02:11:33,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:11:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002683375] [2023-11-12 02:11:33,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002683375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:33,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:11:33,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2023-11-12 02:11:33,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559651137] [2023-11-12 02:11:33,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:33,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-12 02:11:33,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-12 02:11:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:11:33,493 INFO L87 Difference]: Start difference. First operand 875 states and 1323 transitions. Second operand has 42 states, 40 states have (on average 5.275) internal successors, (211), 38 states have internal predecessors, (211), 12 states have call successors, (102), 7 states have call predecessors, (102), 15 states have return successors, (102), 12 states have call predecessors, (102), 12 states have call successors, (102)