./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/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_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/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_0aaeda58-08c3-49da-b612-ee3593630f8f/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 e46325a5cbccf5f74622365796a8d3563d7257b4492aea289104474afb2662ab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:19,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:19,140 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:14:19,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:19,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:19,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:19,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:19,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:19,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:19,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:19,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:19,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:19,180 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:19,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:19,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:14:19,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:19,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:19,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:19,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:19,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:14:19,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:19,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:14:19,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:19,197 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:14:19,198 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:19,198 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:19,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:19,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:19,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:19,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:19,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:19,203 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:14:19,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:19,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:19,204 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:19,205 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:14:19,205 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:19,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:19,206 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:19,206 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_0aaeda58-08c3-49da-b612-ee3593630f8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46325a5cbccf5f74622365796a8d3563d7257b4492aea289104474afb2662ab [2023-11-12 02:14:19,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:19,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:19,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:19,602 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:19,603 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:19,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i [2023-11-12 02:14:22,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:23,508 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:23,509 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i [2023-11-12 02:14:23,549 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/data/7f6fe602f/365ecab20c7f4995a4fd7a67f5123915/FLAGa05fd5378 [2023-11-12 02:14:23,570 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/data/7f6fe602f/365ecab20c7f4995a4fd7a67f5123915 [2023-11-12 02:14:23,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:23,576 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:23,578 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:23,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:23,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:23,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3980af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:23, skipping insertion in model container [2023-11-12 02:14:23,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:23" (1/1) ... [2023-11-12 02:14:23,671 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:23,854 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_0aaeda58-08c3-49da-b612-ee3593630f8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i[916,929] [2023-11-12 02:14:24,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:24,079 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:24,096 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_0aaeda58-08c3-49da-b612-ee3593630f8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-73.i[916,929] [2023-11-12 02:14:24,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:24,220 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:24,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24 WrapperNode [2023-11-12 02:14:24,221 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:24,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:24,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:24,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:24,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,390 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 436 [2023-11-12 02:14:24,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:24,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:24,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:24,393 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:24,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,524 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:24,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:24,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:24,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:24,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:24,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:24,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:14:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:14:24,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:14:24,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:14:24,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:24,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:24,789 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:24,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:25,778 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:25,789 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:25,789 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:14:25,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:25 BoogieIcfgContainer [2023-11-12 02:14:25,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:25,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:25,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:25,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:25,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:23" (1/3) ... [2023-11-12 02:14:25,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3369b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:25, skipping insertion in model container [2023-11-12 02:14:25,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24" (2/3) ... [2023-11-12 02:14:25,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3369b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:25, skipping insertion in model container [2023-11-12 02:14:25,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:25" (3/3) ... [2023-11-12 02:14:25,802 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-73.i [2023-11-12 02:14:25,823 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:25,824 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:14:25,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:25,897 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;@713168f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:25,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:14:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 117 states have internal predecessors, (175), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-12 02:14:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-11-12 02:14:25,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:25,947 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:25,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:25,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash -645430807, now seen corresponding path program 1 times [2023-11-12 02:14:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093969592] [2023-11-12 02:14:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093969592] [2023-11-12 02:14:26,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:14:26,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775602728] [2023-11-12 02:14:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:26,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:26,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:26,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:26,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:14:27,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2023-11-12 02:14:27,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775602728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:27,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120430139] [2023-11-12 02:14:27,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:14:27,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:14:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:14:27,193 INFO L87 Difference]: Start difference. First operand has 173 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 117 states have internal predecessors, (175), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-12 02:14:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:27,268 INFO L93 Difference]: Finished difference Result 339 states and 614 transitions. [2023-11-12 02:14:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:14:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) Word has length 350 [2023-11-12 02:14:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:27,284 INFO L225 Difference]: With dead ends: 339 [2023-11-12 02:14:27,284 INFO L226 Difference]: Without dead ends: 169 [2023-11-12 02:14:27,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 349 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 02:14:27,296 INFO L413 NwaCegarLoop]: 275 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, 275 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 02:14:27,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-12 02:14:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-12 02:14:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.4778761061946903) internal successors, (167), 113 states have internal predecessors, (167), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-12 02:14:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 275 transitions. [2023-11-12 02:14:27,388 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 275 transitions. Word has length 350 [2023-11-12 02:14:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:27,389 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 275 transitions. [2023-11-12 02:14:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-12 02:14:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 275 transitions. [2023-11-12 02:14:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-11-12 02:14:27,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:27,403 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:27,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:14:27,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -879482523, now seen corresponding path program 1 times [2023-11-12 02:14:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417982617] [2023-11-12 02:14:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:27,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:27,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626158730] [2023-11-12 02:14:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:27,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:27,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:28,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:14:28,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-12 02:14:28,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:28,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417982617] [2023-11-12 02:14:28,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626158730] [2023-11-12 02:14:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626158730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:28,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:28,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:28,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231738772] [2023-11-12 02:14:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:28,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:28,430 INFO L87 Difference]: Start difference. First operand 169 states and 275 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:28,849 INFO L93 Difference]: Finished difference Result 748 states and 1219 transitions. [2023-11-12 02:14:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 350 [2023-11-12 02:14:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:28,871 INFO L225 Difference]: With dead ends: 748 [2023-11-12 02:14:28,871 INFO L226 Difference]: Without dead ends: 582 [2023-11-12 02:14:28,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:28,877 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 767 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:28,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1845 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-12 02:14:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 346. [2023-11-12 02:14:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 253 states have (on average 1.5494071146245059) internal successors, (392), 254 states have internal predecessors, (392), 90 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-12 02:14:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 572 transitions. [2023-11-12 02:14:29,003 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 572 transitions. Word has length 350 [2023-11-12 02:14:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:29,005 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 572 transitions. [2023-11-12 02:14:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 572 transitions. [2023-11-12 02:14:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-11-12 02:14:29,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:29,027 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:29,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:14:29,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:29,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:29,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1908841821, now seen corresponding path program 1 times [2023-11-12 02:14:29,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:29,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312170106] [2023-11-12 02:14:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:29,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963353500] [2023-11-12 02:14:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:29,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:29,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:29,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2573 proven. 51 refuted. 0 times theorem prover too weak. 3100 trivial. 0 not checked. [2023-11-12 02:14:30,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-12 02:14:30,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312170106] [2023-11-12 02:14:30,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:30,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963353500] [2023-11-12 02:14:30,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963353500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:30,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:30,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:14:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753850513] [2023-11-12 02:14:30,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:30,389 INFO L87 Difference]: Start difference. First operand 346 states and 572 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:31,235 INFO L93 Difference]: Finished difference Result 627 states and 1024 transitions. [2023-11-12 02:14:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 350 [2023-11-12 02:14:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:31,246 INFO L225 Difference]: With dead ends: 627 [2023-11-12 02:14:31,246 INFO L226 Difference]: Without dead ends: 284 [2023-11-12 02:14:31,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 692 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:31,249 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 327 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:31,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 686 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:14:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-12 02:14:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 277. [2023-11-12 02:14:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 183 states have (on average 1.459016393442623) internal successors, (267), 184 states have internal predecessors, (267), 90 states have call successors, (90), 3 states have call predecessors, (90), 3 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-12 02:14:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 447 transitions. [2023-11-12 02:14:31,288 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 447 transitions. Word has length 350 [2023-11-12 02:14:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:31,290 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 447 transitions. [2023-11-12 02:14:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 447 transitions. [2023-11-12 02:14:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-12 02:14:31,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:31,299 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:31,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:31,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1568061183, now seen corresponding path program 1 times [2023-11-12 02:14:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454103911] [2023-11-12 02:14:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:31,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692300368] [2023-11-12 02:14:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:31,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:31,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:31,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:14:31,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-12 02:14:32,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454103911] [2023-11-12 02:14:32,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692300368] [2023-11-12 02:14:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692300368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:32,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:32,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102727235] [2023-11-12 02:14:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:32,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:32,009 INFO L87 Difference]: Start difference. First operand 277 states and 447 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:32,100 INFO L93 Difference]: Finished difference Result 692 states and 1119 transitions. [2023-11-12 02:14:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 351 [2023-11-12 02:14:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:32,111 INFO L225 Difference]: With dead ends: 692 [2023-11-12 02:14:32,111 INFO L226 Difference]: Without dead ends: 477 [2023-11-12 02:14:32,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:32,118 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 248 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:32,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 747 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-12 02:14:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 439. [2023-11-12 02:14:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 306 states have (on average 1.4869281045751634) internal successors, (455), 308 states have internal predecessors, (455), 127 states have call successors, (127), 5 states have call predecessors, (127), 5 states have return successors, (127), 125 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-12 02:14:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 709 transitions. [2023-11-12 02:14:32,207 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 709 transitions. Word has length 351 [2023-11-12 02:14:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:32,210 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 709 transitions. [2023-11-12 02:14:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 709 transitions. [2023-11-12 02:14:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-12 02:14:32,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:32,220 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:32,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:32,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1202926143, now seen corresponding path program 1 times [2023-11-12 02:14:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940210606] [2023-11-12 02:14:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:32,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:32,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327370225] [2023-11-12 02:14:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:32,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:32,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:32,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:32,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:32,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:32,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2805 proven. 63 refuted. 0 times theorem prover too weak. 2856 trivial. 0 not checked. [2023-11-12 02:14:33,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 96 proven. 63 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-12 02:14:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940210606] [2023-11-12 02:14:33,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327370225] [2023-11-12 02:14:33,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327370225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:33,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:33,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:14:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872262348] [2023-11-12 02:14:33,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:33,528 INFO L87 Difference]: Start difference. First operand 439 states and 709 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-12 02:14:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:33,974 INFO L93 Difference]: Finished difference Result 838 states and 1335 transitions. [2023-11-12 02:14:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 351 [2023-11-12 02:14:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:33,981 INFO L225 Difference]: With dead ends: 838 [2023-11-12 02:14:33,981 INFO L226 Difference]: Without dead ends: 461 [2023-11-12 02:14:33,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:33,984 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 179 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:33,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 517 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:14:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-11-12 02:14:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2023-11-12 02:14:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 311 states have (on average 1.45016077170418) internal successors, (451), 313 states have internal predecessors, (451), 127 states have call successors, (127), 8 states have call predecessors, (127), 8 states have return successors, (127), 125 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-12 02:14:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 705 transitions. [2023-11-12 02:14:34,057 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 705 transitions. Word has length 351 [2023-11-12 02:14:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:34,058 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 705 transitions. [2023-11-12 02:14:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-12 02:14:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 705 transitions. [2023-11-12 02:14:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-12 02:14:34,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:34,069 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:34,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:34,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:34,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:34,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1720233855, now seen corresponding path program 1 times [2023-11-12 02:14:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362054150] [2023-11-12 02:14:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:34,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525816623] [2023-11-12 02:14:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:34,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:34,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:34,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:34,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:34,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-12 02:14:34,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362054150] [2023-11-12 02:14:34,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525816623] [2023-11-12 02:14:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525816623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:34,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222986656] [2023-11-12 02:14:34,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:34,823 INFO L87 Difference]: Start difference. First operand 447 states and 705 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:35,293 INFO L93 Difference]: Finished difference Result 665 states and 1051 transitions. [2023-11-12 02:14:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 351 [2023-11-12 02:14:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:35,297 INFO L225 Difference]: With dead ends: 665 [2023-11-12 02:14:35,298 INFO L226 Difference]: Without dead ends: 284 [2023-11-12 02:14:35,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:35,300 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 395 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:35,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 397 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:14:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-12 02:14:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2023-11-12 02:14:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 187 states have (on average 1.3850267379679144) internal successors, (259), 188 states have internal predecessors, (259), 90 states have call successors, (90), 5 states have call predecessors, (90), 5 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-12 02:14:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 439 transitions. [2023-11-12 02:14:35,344 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 439 transitions. Word has length 351 [2023-11-12 02:14:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:35,345 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 439 transitions. [2023-11-12 02:14:35,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 439 transitions. [2023-11-12 02:14:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-12 02:14:35,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:35,354 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:35,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:35,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:35,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:35,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -70614063, now seen corresponding path program 1 times [2023-11-12 02:14:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:35,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734020347] [2023-11-12 02:14:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:35,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:35,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:35,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914571099] [2023-11-12 02:14:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:35,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:36,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:14:36,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2538 proven. 231 refuted. 0 times theorem prover too weak. 2955 trivial. 0 not checked. [2023-11-12 02:14:37,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 81 proven. 234 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2023-11-12 02:14:37,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734020347] [2023-11-12 02:14:37,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914571099] [2023-11-12 02:14:37,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914571099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:37,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:37,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-12 02:14:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880129183] [2023-11-12 02:14:37,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:14:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:14:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:14:37,669 INFO L87 Difference]: Start difference. First operand 283 states and 439 transitions. Second operand has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 5 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-12 02:14:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:38,746 INFO L93 Difference]: Finished difference Result 627 states and 959 transitions. [2023-11-12 02:14:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:14:38,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 5 states have call predecessors, (96), 5 states have call successors, (96) Word has length 352 [2023-11-12 02:14:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:38,751 INFO L225 Difference]: With dead ends: 627 [2023-11-12 02:14:38,751 INFO L226 Difference]: Without dead ends: 410 [2023-11-12 02:14:38,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:14:38,754 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 593 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:38,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1047 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-12 02:14:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 380. [2023-11-12 02:14:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 266 states have (on average 1.3984962406015038) internal successors, (372), 268 states have internal predecessors, (372), 102 states have call successors, (102), 11 states have call predecessors, (102), 11 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-12 02:14:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 576 transitions. [2023-11-12 02:14:38,801 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 576 transitions. Word has length 352 [2023-11-12 02:14:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:38,802 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 576 transitions. [2023-11-12 02:14:38,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 5 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-12 02:14:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 576 transitions. [2023-11-12 02:14:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-12 02:14:38,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:38,810 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:38,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:39,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:39,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:39,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1923530643, now seen corresponding path program 1 times [2023-11-12 02:14:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201257111] [2023-11-12 02:14:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:39,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:39,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559276360] [2023-11-12 02:14:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:39,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:39,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:39,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:39,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:14:39,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 1985 proven. 33 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2023-11-12 02:14:40,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 126 proven. 33 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-12 02:14:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201257111] [2023-11-12 02:14:41,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559276360] [2023-11-12 02:14:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559276360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:41,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:41,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-12 02:14:41,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932840664] [2023-11-12 02:14:41,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:14:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:14:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:41,183 INFO L87 Difference]: Start difference. First operand 380 states and 576 transitions. Second operand has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) [2023-11-12 02:14:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:42,979 INFO L93 Difference]: Finished difference Result 1235 states and 1901 transitions. [2023-11-12 02:14:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) Word has length 352 [2023-11-12 02:14:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:42,993 INFO L225 Difference]: With dead ends: 1235 [2023-11-12 02:14:42,993 INFO L226 Difference]: Without dead ends: 933 [2023-11-12 02:14:42,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:14:42,996 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 732 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:42,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 1241 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 02:14:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2023-11-12 02:14:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 810. [2023-11-12 02:14:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 622 states have (on average 1.4405144694533762) internal successors, (896), 625 states have internal predecessors, (896), 168 states have call successors, (168), 19 states have call predecessors, (168), 19 states have return successors, (168), 165 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-12 02:14:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1232 transitions. [2023-11-12 02:14:43,116 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1232 transitions. Word has length 352 [2023-11-12 02:14:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:43,117 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1232 transitions. [2023-11-12 02:14:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) [2023-11-12 02:14:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1232 transitions. [2023-11-12 02:14:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:14:43,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:43,121 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:43,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:14:43,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:14:43,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:43,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash 614551928, now seen corresponding path program 1 times [2023-11-12 02:14:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:43,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914322486] [2023-11-12 02:14:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:43,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012144666] [2023-11-12 02:14:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:43,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:43,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:43,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:14:43,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2859 proven. 90 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2023-11-12 02:14:44,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-12 02:14:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:44,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914322486] [2023-11-12 02:14:44,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:44,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012144666] [2023-11-12 02:14:44,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012144666] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:44,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-12 02:14:44,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421124578] [2023-11-12 02:14:44,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:44,522 INFO L87 Difference]: Start difference. First operand 810 states and 1232 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:45,132 INFO L93 Difference]: Finished difference Result 2726 states and 4153 transitions. [2023-11-12 02:14:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:14:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 353 [2023-11-12 02:14:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:45,147 INFO L225 Difference]: With dead ends: 2726 [2023-11-12 02:14:45,147 INFO L226 Difference]: Without dead ends: 1994 [2023-11-12 02:14:45,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:14:45,151 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 402 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:45,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1373 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:14:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2023-11-12 02:14:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1103. [2023-11-12 02:14:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 880 states have (on average 1.4477272727272728) internal successors, (1274), 885 states have internal predecessors, (1274), 196 states have call successors, (196), 26 states have call predecessors, (196), 26 states have return successors, (196), 191 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-12 02:14:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1666 transitions. [2023-11-12 02:14:45,285 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1666 transitions. Word has length 353 [2023-11-12 02:14:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:45,286 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1666 transitions. [2023-11-12 02:14:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:14:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1666 transitions. [2023-11-12 02:14:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:14:45,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:45,290 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:45,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:45,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:14:45,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:45,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:45,493 INFO L85 PathProgramCache]: Analyzing trace with hash 40562808, now seen corresponding path program 1 times [2023-11-12 02:14:45,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:45,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824039392] [2023-11-12 02:14:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:45,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:45,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526888434] [2023-11-12 02:14:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:45,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:45,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:45,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:46,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:14:46,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 1985 proven. 33 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2023-11-12 02:14:46,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 126 proven. 33 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-12 02:14:47,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824039392] [2023-11-12 02:14:47,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:47,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526888434] [2023-11-12 02:14:47,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526888434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:47,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2023-11-12 02:14:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792362086] [2023-11-12 02:14:47,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:47,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:14:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:14:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:14:47,793 INFO L87 Difference]: Start difference. First operand 1103 states and 1666 transitions. Second operand has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) [2023-11-12 02:14:50,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:14:52,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:14:54,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:14:56,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:14:58,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:15:01,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:15:03,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:15:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:04,149 INFO L93 Difference]: Finished difference Result 2704 states and 4134 transitions. [2023-11-12 02:15:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:15:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) Word has length 353 [2023-11-12 02:15:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:04,161 INFO L225 Difference]: With dead ends: 2704 [2023-11-12 02:15:04,161 INFO L226 Difference]: Without dead ends: 1683 [2023-11-12 02:15:04,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:15:04,165 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1092 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 338 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:04,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1840 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 15.9s Time] [2023-11-12 02:15:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2023-11-12 02:15:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1249. [2023-11-12 02:15:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1026 states have (on average 1.4736842105263157) internal successors, (1512), 1031 states have internal predecessors, (1512), 196 states have call successors, (196), 26 states have call predecessors, (196), 26 states have return successors, (196), 191 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-12 02:15:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1904 transitions. [2023-11-12 02:15:04,293 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1904 transitions. Word has length 353 [2023-11-12 02:15:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:04,294 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1904 transitions. [2023-11-12 02:15:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 4 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 4 states have call predecessors, (108), 4 states have call successors, (108) [2023-11-12 02:15:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1904 transitions. [2023-11-12 02:15:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:15:04,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:04,299 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:04,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:15:04,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:04,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1968835510, now seen corresponding path program 1 times [2023-11-12 02:15:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:04,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440643828] [2023-11-12 02:15:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:04,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178504139] [2023-11-12 02:15:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:04,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:04,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:04,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:15:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:05,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:15:05,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-12 02:15:05,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440643828] [2023-11-12 02:15:05,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178504139] [2023-11-12 02:15:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178504139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908594341] [2023-11-12 02:15:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:05,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:15:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:05,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:15:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:05,183 INFO L87 Difference]: Start difference. First operand 1249 states and 1904 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:15:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:05,745 INFO L93 Difference]: Finished difference Result 3044 states and 4619 transitions. [2023-11-12 02:15:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:15:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 353 [2023-11-12 02:15:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:05,760 INFO L225 Difference]: With dead ends: 3044 [2023-11-12 02:15:05,760 INFO L226 Difference]: Without dead ends: 1877 [2023-11-12 02:15:05,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:15:05,764 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 636 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:05,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 978 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2023-11-12 02:15:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1871. [2023-11-12 02:15:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1495 states have (on average 1.4354515050167225) internal successors, (2146), 1502 states have internal predecessors, (2146), 330 states have call successors, (330), 45 states have call predecessors, (330), 45 states have return successors, (330), 323 states have call predecessors, (330), 330 states have call successors, (330) [2023-11-12 02:15:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2806 transitions. [2023-11-12 02:15:06,003 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2806 transitions. Word has length 353 [2023-11-12 02:15:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:06,004 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 2806 transitions. [2023-11-12 02:15:06,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-12 02:15:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2806 transitions. [2023-11-12 02:15:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:15:06,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:06,009 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:06,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:06,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:15:06,219 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:06,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2109384120, now seen corresponding path program 1 times [2023-11-12 02:15:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:06,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455467705] [2023-11-12 02:15:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:06,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:06,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498125180] [2023-11-12 02:15:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:06,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:06,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:06,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaeda58-08c3-49da-b612-ee3593630f8f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:15:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:06,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:15:06,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 53 proven. 159 refuted. 0 times theorem prover too weak. 5512 trivial. 0 not checked. [2023-11-12 02:15:07,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:09,901 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~var_1_4~0 4294967296)) (.cse0 (mod c_~var_1_34~0 4294967296)) (.cse2 (mod |c_ULTIMATE.start_step_~stepLocal_0~0#1| 4294967296))) (and (<= (mod (div .cse0 .cse1) 4294967296) .cse2) (forall ((v_z_6 Int)) (or (< v_z_6 (+ .cse1 1)) (< (mod (div .cse0 v_z_6) 4294967296) (+ 1 .cse2)))))) is different from false [2023-11-12 02:15:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455467705] [2023-11-12 02:15:14,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498125180] [2023-11-12 02:15:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498125180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:14,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:14,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-12 02:15:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656824789] [2023-11-12 02:15:14,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:15:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:15:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:15:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=27, Unknown=3, NotChecked=10, Total=56 [2023-11-12 02:15:14,469 INFO L87 Difference]: Start difference. First operand 1871 states and 2806 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-12 02:15:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:15,546 INFO L93 Difference]: Finished difference Result 3732 states and 5560 transitions. [2023-11-12 02:15:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:15:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) Word has length 353 [2023-11-12 02:15:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:15,561 INFO L225 Difference]: With dead ends: 3732 [2023-11-12 02:15:15,561 INFO L226 Difference]: Without dead ends: 1943 [2023-11-12 02:15:15,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=39, Invalid=72, Unknown=3, NotChecked=18, Total=132 [2023-11-12 02:15:15,566 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 140 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:15,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 610 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:15:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states.