./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array15_pattern.c --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_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/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_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array15_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/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_ec812a99-654a-448d-9b23-49f25efadebf/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 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:25:40,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:25:40,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:25:40,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:25:40,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:25:40,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:25:40,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:25:40,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:25:40,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:25:40,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:25:40,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:25:40,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:25:40,428 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:25:40,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:25:40,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:25:40,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:25:40,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:25:40,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:25:40,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:25:40,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:25:40,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:25:40,434 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:25:40,434 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:25:40,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:25:40,435 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:25:40,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:25:40,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:25:40,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:25:40,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:25:40,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:25:40,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:25:40,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:25:40,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:25:40,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:25:40,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:25:40,440 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:25:40,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:25:40,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:25:40,441 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:25:40,441 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_ec812a99-654a-448d-9b23-49f25efadebf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2023-11-12 02:25:40,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:25:40,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:25:40,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:25:40,761 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:25:40,762 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:25:40,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-patterns/array15_pattern.c [2023-11-12 02:25:43,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:25:44,144 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:25:44,145 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/sv-benchmarks/c/array-patterns/array15_pattern.c [2023-11-12 02:25:44,154 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/data/449a1ed2e/4898dc6489174443ad9b3a5d1e413832/FLAGa9b2895b3 [2023-11-12 02:25:44,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/data/449a1ed2e/4898dc6489174443ad9b3a5d1e413832 [2023-11-12 02:25:44,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:25:44,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:25:44,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:44,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:25:44,182 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:25:44,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed9ad01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44, skipping insertion in model container [2023-11-12 02:25:44,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,209 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:25:44,362 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_ec812a99-654a-448d-9b23-49f25efadebf/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2023-11-12 02:25:44,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:44,405 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:25:44,421 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_ec812a99-654a-448d-9b23-49f25efadebf/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2023-11-12 02:25:44,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:44,448 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:25:44,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44 WrapperNode [2023-11-12 02:25:44,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:44,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:44,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:25:44,450 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:25:44,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,490 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2023-11-12 02:25:44,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:44,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:25:44,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:25:44,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:25:44,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,511 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:25:44,522 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:25:44,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:25:44,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:25:44,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (1/1) ... [2023-11-12 02:25:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:25:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:44,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:25:44,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:25:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:25:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:25:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:25:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:25:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:25:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:25:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:25:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:25:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:25:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:25:44,669 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:25:44,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:25:44,897 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:25:44,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:25:44,905 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 02:25:44,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:44 BoogieIcfgContainer [2023-11-12 02:25:44,907 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:25:44,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:25:44,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:25:44,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:25:44,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:25:44" (1/3) ... [2023-11-12 02:25:44,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c4fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:44, skipping insertion in model container [2023-11-12 02:25:44,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:44" (2/3) ... [2023-11-12 02:25:44,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c4fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:44, skipping insertion in model container [2023-11-12 02:25:44,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:44" (3/3) ... [2023-11-12 02:25:44,917 INFO L112 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2023-11-12 02:25:44,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:25:44,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:25:44,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:25:44,985 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;@55c6b246, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:25:44,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:25:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:25:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:25:44,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:44,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:44,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:45,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2023-11-12 02:25:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244851330] [2023-11-12 02:25:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244851330] [2023-11-12 02:25:45,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:25:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956548501] [2023-11-12 02:25:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:45,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:45,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:45,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:25:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:45,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:25:45,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:45,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:25:45,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956548501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:25:45,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974626235] [2023-11-12 02:25:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:45,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:25:45,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:25:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:25:45,366 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:25:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:45,387 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2023-11-12 02:25:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:25:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-12 02:25:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:45,396 INFO L225 Difference]: With dead ends: 61 [2023-11-12 02:25:45,396 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 02:25:45,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 02:25:45,403 INFO L413 NwaCegarLoop]: 39 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, 39 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 02:25:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:25:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 02:25:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-12 02:25:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:25:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-12 02:25:45,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2023-11-12 02:25:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:45,437 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-12 02:25:45,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 02:25:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-12 02:25:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 02:25:45,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:45,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:45,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:25:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:25:45,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:45,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2023-11-12 02:25:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756265032] [2023-11-12 02:25:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:45,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:45,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874308634] [2023-11-12 02:25:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:45,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:45,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:45,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:25:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:45,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:25:45,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:25:45,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:25:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756265032] [2023-11-12 02:25:45,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874308634] [2023-11-12 02:25:45,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874308634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:45,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:45,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:25:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570594513] [2023-11-12 02:25:45,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:25:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:25:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:25:45,924 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:25:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:46,103 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-11-12 02:25:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:25:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-12 02:25:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:46,108 INFO L225 Difference]: With dead ends: 60 [2023-11-12 02:25:46,108 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:25:46,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:25:46,110 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:46,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:25:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:25:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-11-12 02:25:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:25:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-12 02:25:46,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2023-11-12 02:25:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:46,121 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-12 02:25:46,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:25:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-12 02:25:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:25:46,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:46,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 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 02:25:46,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:25:46,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:46,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2023-11-12 02:25:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272094838] [2023-11-12 02:25:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:46,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84919915] [2023-11-12 02:25:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:46,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:46,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:46,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:25:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:46,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:25:46,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:25:46,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:25:46,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:46,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272094838] [2023-11-12 02:25:46,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84919915] [2023-11-12 02:25:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84919915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:46,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:46,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:25:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629829684] [2023-11-12 02:25:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:46,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:25:46,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:25:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:25:46,514 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:25:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:46,625 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2023-11-12 02:25:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:25:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-12 02:25:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:46,630 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:25:46,630 INFO L226 Difference]: Without dead ends: 38 [2023-11-12 02:25:46,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 02:25:46,634 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:46,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:25:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-12 02:25:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-12 02:25:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:25:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-12 02:25:46,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2023-11-12 02:25:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:46,661 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-12 02:25:46,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:25:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-12 02:25:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:25:46,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:46,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 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 02:25:46,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:46,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:46,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2023-11-12 02:25:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388930939] [2023-11-12 02:25:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:46,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994959667] [2023-11-12 02:25:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:46,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:46,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:25:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:46,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:25:46,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:25:47,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:25:47,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388930939] [2023-11-12 02:25:47,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994959667] [2023-11-12 02:25:47,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994959667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:47,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:47,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2023-11-12 02:25:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254999861] [2023-11-12 02:25:47,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:25:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:25:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:25:47,685 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:25:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:48,263 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-11-12 02:25:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:25:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2023-11-12 02:25:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:48,267 INFO L225 Difference]: With dead ends: 107 [2023-11-12 02:25:48,267 INFO L226 Difference]: Without dead ends: 85 [2023-11-12 02:25:48,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:25:48,270 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:48,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 154 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:25:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-12 02:25:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2023-11-12 02:25:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:25:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2023-11-12 02:25:48,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2023-11-12 02:25:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:48,291 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2023-11-12 02:25:48,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:25:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2023-11-12 02:25:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:25:48,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:48,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 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 02:25:48,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:48,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:48,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2023-11-12 02:25:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135763935] [2023-11-12 02:25:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:48,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:48,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940819774] [2023-11-12 02:25:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:48,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:48,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:48,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:48,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:25:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:48,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 02:25:48,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:48,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:25:49,151 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-12 02:25:49,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 27 [2023-11-12 02:25:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:25:49,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:49,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-12 02:25:49,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-11-12 02:25:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:25:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135763935] [2023-11-12 02:25:49,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940819774] [2023-11-12 02:25:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940819774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:49,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2023-11-12 02:25:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870457106] [2023-11-12 02:25:49,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:49,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:25:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:25:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:25:49,693 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:25:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:50,562 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2023-11-12 02:25:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:25:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-11-12 02:25:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:50,566 INFO L225 Difference]: With dead ends: 101 [2023-11-12 02:25:50,566 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 02:25:50,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 02:25:50,568 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:50,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 166 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:25:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 02:25:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2023-11-12 02:25:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:25:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2023-11-12 02:25:50,611 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2023-11-12 02:25:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:50,612 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2023-11-12 02:25:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:25:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2023-11-12 02:25:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:25:50,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:50,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 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 02:25:50,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:50,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:50,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:50,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2023-11-12 02:25:50,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:50,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791283340] [2023-11-12 02:25:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:50,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:50,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:50,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023359098] [2023-11-12 02:25:50,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:50,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:50,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:50,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:50,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:25:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:50,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:25:50,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:25:51,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:25:51,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:51,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791283340] [2023-11-12 02:25:51,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:51,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023359098] [2023-11-12 02:25:51,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023359098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:51,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:51,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-12 02:25:51,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978185682] [2023-11-12 02:25:51,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:51,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:25:51,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:51,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:25:51,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:25:51,097 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:25:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:51,317 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2023-11-12 02:25:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:25:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-12 02:25:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:51,319 INFO L225 Difference]: With dead ends: 155 [2023-11-12 02:25:51,319 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 02:25:51,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:25:51,321 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 100 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:51,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 116 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:25:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 02:25:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2023-11-12 02:25:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:25:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2023-11-12 02:25:51,348 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2023-11-12 02:25:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:51,349 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2023-11-12 02:25:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:25:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2023-11-12 02:25:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:25:51,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:51,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 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 02:25:51,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:51,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:51,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:51,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2023-11-12 02:25:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:51,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943496431] [2023-11-12 02:25:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:51,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:51,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:51,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132739995] [2023-11-12 02:25:51,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:51,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:51,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:51,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:51,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:25:51,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:51,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:25:51,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:25:51,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:25:51,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:51,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943496431] [2023-11-12 02:25:51,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:51,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132739995] [2023-11-12 02:25:51,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132739995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:51,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:51,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-12 02:25:51,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127870685] [2023-11-12 02:25:51,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:51,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:25:51,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:25:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:25:51,803 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:25:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:52,052 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2023-11-12 02:25:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:25:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-12 02:25:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:52,055 INFO L225 Difference]: With dead ends: 167 [2023-11-12 02:25:52,055 INFO L226 Difference]: Without dead ends: 120 [2023-11-12 02:25:52,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:25:52,058 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:52,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 103 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:25:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-12 02:25:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2023-11-12 02:25:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:25:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2023-11-12 02:25:52,117 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2023-11-12 02:25:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:52,118 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2023-11-12 02:25:52,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:25:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2023-11-12 02:25:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:25:52,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:52,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 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 02:25:52,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:52,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:52,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:52,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2023-11-12 02:25:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:52,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059074433] [2023-11-12 02:25:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:52,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:52,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:52,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544337108] [2023-11-12 02:25:52,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:25:52,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:52,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:52,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:25:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 02:25:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:52,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:25:52,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:25:52,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:25:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059074433] [2023-11-12 02:25:52,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544337108] [2023-11-12 02:25:52,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544337108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:52,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:52,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-12 02:25:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163435054] [2023-11-12 02:25:52,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:52,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:25:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:25:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:25:52,570 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:25:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:52,711 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2023-11-12 02:25:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:25:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-12 02:25:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:52,713 INFO L225 Difference]: With dead ends: 144 [2023-11-12 02:25:52,713 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 02:25:52,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:25:52,717 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:25:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 02:25:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2023-11-12 02:25:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:25:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2023-11-12 02:25:52,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 44 [2023-11-12 02:25:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:52,740 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2023-11-12 02:25:52,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:25:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2023-11-12 02:25:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:25:52,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:52,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 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 02:25:52,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:25:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:25:52,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:52,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2023-11-12 02:25:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144200218] [2023-11-12 02:25:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:52,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850130853] [2023-11-12 02:25:52,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:25:52,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:52,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:25:53,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:25:53,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:53,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:25:53,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:25:53,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:25:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:53,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144200218] [2023-11-12 02:25:53,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850130853] [2023-11-12 02:25:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850130853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:53,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:25:53,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-11-12 02:25:53,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209975629] [2023-11-12 02:25:53,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:25:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:25:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:25:53,737 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 02:25:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:54,414 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2023-11-12 02:25:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:25:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2023-11-12 02:25:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:54,416 INFO L225 Difference]: With dead ends: 98 [2023-11-12 02:25:54,416 INFO L226 Difference]: Without dead ends: 92 [2023-11-12 02:25:54,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:25:54,417 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 204 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:54,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 119 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:25:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-12 02:25:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2023-11-12 02:25:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:25:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-11-12 02:25:54,440 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2023-11-12 02:25:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:54,441 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-11-12 02:25:54,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 02:25:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-11-12 02:25:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 02:25:54,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:54,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:54,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:25:54,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:54,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 4 times [2023-11-12 02:25:54,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092408960] [2023-11-12 02:25:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:54,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:54,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987842126] [2023-11-12 02:25:54,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:25:54,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:54,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:54,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:25:54,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:25:54,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:54,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-12 02:25:54,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:55,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:25:55,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:25:55,498 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:55,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:25:55,657 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:55,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-12 02:25:56,527 INFO L322 Elim1Store]: treesize reduction 104, result has 37.0 percent of original size [2023-11-12 02:25:56,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 73 [2023-11-12 02:25:58,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:58,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 56 [2023-11-12 02:25:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:25:58,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092408960] [2023-11-12 02:26:09,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987842126] [2023-11-12 02:26:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987842126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:09,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:26:09,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-11-12 02:26:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701446429] [2023-11-12 02:26:09,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:09,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-12 02:26:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-12 02:26:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1956, Unknown=4, NotChecked=0, Total=2256 [2023-11-12 02:26:09,422 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:26:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:10,968 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2023-11-12 02:26:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-12 02:26:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2023-11-12 02:26:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:10,970 INFO L225 Difference]: With dead ends: 130 [2023-11-12 02:26:10,970 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 02:26:10,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=397, Invalid=2905, Unknown=4, NotChecked=0, Total=3306 [2023-11-12 02:26:10,974 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:10,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 149 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:26:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 02:26:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2023-11-12 02:26:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:26:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2023-11-12 02:26:11,008 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2023-11-12 02:26:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:11,008 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2023-11-12 02:26:11,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:26:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2023-11-12 02:26:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 02:26:11,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:11,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:11,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:26:11,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:11,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 4 times [2023-11-12 02:26:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846261167] [2023-11-12 02:26:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:11,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:11,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387019633] [2023-11-12 02:26:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:26:11,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:11,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:11,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:11,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:26:11,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:26:11,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:11,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-12 02:26:11,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:11,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:26:11,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:26:11,973 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:11,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:26:12,102 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:12,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 02:26:22,408 INFO L322 Elim1Store]: treesize reduction 618, result has 10.0 percent of original size [2023-11-12 02:26:22,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 98 treesize of output 107 [2023-11-12 02:26:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:26:23,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:24,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:24,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846261167] [2023-11-12 02:26:24,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387019633] [2023-11-12 02:26:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387019633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:24,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:26:24,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-11-12 02:26:24,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006644482] [2023-11-12 02:26:24,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-12 02:26:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-12 02:26:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=2419, Unknown=2, NotChecked=0, Total=2862 [2023-11-12 02:26:24,968 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:26:30,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:26:32,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:26:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:34,354 INFO L93 Difference]: Finished difference Result 206 states and 245 transitions. [2023-11-12 02:26:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-12 02:26:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2023-11-12 02:26:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:34,356 INFO L225 Difference]: With dead ends: 206 [2023-11-12 02:26:34,357 INFO L226 Difference]: Without dead ends: 139 [2023-11-12 02:26:34,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=848, Invalid=4551, Unknown=3, NotChecked=0, Total=5402 [2023-11-12 02:26:34,359 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:34,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 220 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 779 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-11-12 02:26:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-12 02:26:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2023-11-12 02:26:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 02:26:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2023-11-12 02:26:34,403 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 57 [2023-11-12 02:26:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:34,404 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2023-11-12 02:26:34,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 32 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:26:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2023-11-12 02:26:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 02:26:34,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:34,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:34,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:34,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:34,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:34,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1720947117, now seen corresponding path program 5 times [2023-11-12 02:26:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:34,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333428987] [2023-11-12 02:26:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:34,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:34,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:34,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017637490] [2023-11-12 02:26:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:26:34,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:34,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:34,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:26:35,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-12 02:26:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:35,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:26:35,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:26:35,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 02:26:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333428987] [2023-11-12 02:26:35,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017637490] [2023-11-12 02:26:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017637490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:35,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:35,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 02:26:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178436368] [2023-11-12 02:26:35,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:35,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:26:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:26:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:26:35,254 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:35,506 INFO L93 Difference]: Finished difference Result 271 states and 320 transitions. [2023-11-12 02:26:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:26:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2023-11-12 02:26:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:35,508 INFO L225 Difference]: With dead ends: 271 [2023-11-12 02:26:35,509 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:26:35,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:26:35,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 190 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:35,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 97 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:26:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:26:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2023-11-12 02:26:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 120 states have internal predecessors, (139), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:26:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2023-11-12 02:26:35,560 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 59 [2023-11-12 02:26:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:35,560 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2023-11-12 02:26:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2023-11-12 02:26:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 02:26:35,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:35,562 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:35,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:35,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:35,764 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:35,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1961832173, now seen corresponding path program 6 times [2023-11-12 02:26:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:35,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129829101] [2023-11-12 02:26:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:35,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:35,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346860250] [2023-11-12 02:26:35,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:26:35,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:35,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:35,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:26:35,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-12 02:26:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:35,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:26:35,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 02:26:36,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:26:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:36,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129829101] [2023-11-12 02:26:36,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:36,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346860250] [2023-11-12 02:26:36,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346860250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:36,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:36,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 02:26:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555321329] [2023-11-12 02:26:36,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:26:36,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:26:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:26:36,161 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:36,576 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2023-11-12 02:26:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:26:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2023-11-12 02:26:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:36,579 INFO L225 Difference]: With dead ends: 200 [2023-11-12 02:26:36,580 INFO L226 Difference]: Without dead ends: 196 [2023-11-12 02:26:36,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:26:36,581 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:36,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 117 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:26:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-12 02:26:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 155. [2023-11-12 02:26:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 137 states have (on average 1.167883211678832) internal successors, (160), 137 states have internal predecessors, (160), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 02:26:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2023-11-12 02:26:36,637 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 59 [2023-11-12 02:26:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:36,637 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2023-11-12 02:26:36,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2023-11-12 02:26:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:26:36,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:36,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:36,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:36,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1029790343, now seen corresponding path program 7 times [2023-11-12 02:26:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:36,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056367764] [2023-11-12 02:26:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:36,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:36,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675431808] [2023-11-12 02:26:36,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:26:36,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:36,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:36,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:26:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:36,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:26:36,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 02:26:37,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:26:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056367764] [2023-11-12 02:26:37,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675431808] [2023-11-12 02:26:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675431808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:37,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 02:26:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974357264] [2023-11-12 02:26:37,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:26:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:26:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:26:37,223 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:37,549 INFO L93 Difference]: Finished difference Result 203 states and 229 transitions. [2023-11-12 02:26:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:26:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2023-11-12 02:26:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:37,551 INFO L225 Difference]: With dead ends: 203 [2023-11-12 02:26:37,552 INFO L226 Difference]: Without dead ends: 158 [2023-11-12 02:26:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:26:37,553 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:37,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 92 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:26:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-12 02:26:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2023-11-12 02:26:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 130 states have internal predecessors, (148), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:26:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2023-11-12 02:26:37,611 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 64 [2023-11-12 02:26:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:37,612 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2023-11-12 02:26:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2023-11-12 02:26:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:26:37,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:37,613 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:37,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:37,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:26:37,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:37,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash -188754233, now seen corresponding path program 8 times [2023-11-12 02:26:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:37,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940070338] [2023-11-12 02:26:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:37,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:37,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305814601] [2023-11-12 02:26:37,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:37,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:26:37,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:26:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:37,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:26:37,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-12 02:26:38,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 02:26:38,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940070338] [2023-11-12 02:26:38,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305814601] [2023-11-12 02:26:38,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305814601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:38,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:38,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-12 02:26:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621279456] [2023-11-12 02:26:38,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:26:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:26:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:26:38,165 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:38,519 INFO L93 Difference]: Finished difference Result 238 states and 274 transitions. [2023-11-12 02:26:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:26:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2023-11-12 02:26:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:38,521 INFO L225 Difference]: With dead ends: 238 [2023-11-12 02:26:38,522 INFO L226 Difference]: Without dead ends: 178 [2023-11-12 02:26:38,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:26:38,523 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:38,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 89 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:26:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-12 02:26:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2023-11-12 02:26:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:26:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2023-11-12 02:26:38,592 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 68 [2023-11-12 02:26:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2023-11-12 02:26:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:26:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2023-11-12 02:26:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:26:38,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:38,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:38,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:38,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:26:38,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:38,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1359141662, now seen corresponding path program 1 times [2023-11-12 02:26:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075719420] [2023-11-12 02:26:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:38,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:38,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360438531] [2023-11-12 02:26:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:38,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:38,827 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:38,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec812a99-654a-448d-9b23-49f25efadebf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:26:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:39,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-12 02:26:39,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:39,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:26:39,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:26:39,645 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:39,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:26:39,764 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:39,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44