./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/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_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/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_d069103c-c6cd-4214-81f0-5bfe85957e26/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 4f3611a875fdf984da4dbe6a7960e00cbc86546d93a80a5be72248390d98dd3b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:16:16,693 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:16:16,783 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:16:16,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:16:16,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:16:16,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:16:16,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:16:16,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:16:16,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:16:16,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:16:16,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:16:16,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:16:16,856 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:16:16,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:16:16,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:16:16,860 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:16:16,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:16:16,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:16:16,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:16:16,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:16:16,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:16:16,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:16:16,863 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:16:16,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:16:16,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:16:16,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:16:16,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:16:16,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:16:16,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:16:16,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:16:16,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:16:16,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:16:16,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:16:16,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:16:16,870 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:16:16,870 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:16:16,871 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:16:16,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:16:16,871 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:16:16,872 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_d069103c-c6cd-4214-81f0-5bfe85957e26/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f3611a875fdf984da4dbe6a7960e00cbc86546d93a80a5be72248390d98dd3b [2023-11-12 02:16:17,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:16:17,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:16:17,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:16:17,203 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:16:17,204 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:16:17,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i [2023-11-12 02:16:20,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:16:20,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:16:20,827 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i [2023-11-12 02:16:20,850 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/data/331e55d6e/30742f3a135844aa81c464dfdd8cb6c1/FLAG059f618ea [2023-11-12 02:16:20,865 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/data/331e55d6e/30742f3a135844aa81c464dfdd8cb6c1 [2023-11-12 02:16:20,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:16:20,869 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:16:20,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:16:20,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:16:20,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:16:20,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:20" (1/1) ... [2023-11-12 02:16:20,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f22051c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:20, skipping insertion in model container [2023-11-12 02:16:20,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:20" (1/1) ... [2023-11-12 02:16:20,932 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:16:21,086 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_d069103c-c6cd-4214-81f0-5bfe85957e26/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i[916,929] [2023-11-12 02:16:21,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:16:21,304 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:16:21,315 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_d069103c-c6cd-4214-81f0-5bfe85957e26/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-39.i[916,929] [2023-11-12 02:16:21,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:16:21,448 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:16:21,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21 WrapperNode [2023-11-12 02:16:21,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:16:21,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:16:21,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:16:21,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:16:21,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,564 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 353 [2023-11-12 02:16:21,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:16:21,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:16:21,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:16:21,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:16:21,576 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:16:21,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:16:21,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:16:21,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:16:21,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (1/1) ... [2023-11-12 02:16:21,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:16:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:21,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:16:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:16:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:16:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:16:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:16:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:16:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:16:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:16:21,939 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:16:21,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:16:22,954 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:16:22,966 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:16:22,966 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:16:22,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:22 BoogieIcfgContainer [2023-11-12 02:16:22,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:16:22,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:16:22,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:16:22,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:16:22,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:16:20" (1/3) ... [2023-11-12 02:16:22,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929c920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:22, skipping insertion in model container [2023-11-12 02:16:22,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:21" (2/3) ... [2023-11-12 02:16:22,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929c920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:22, skipping insertion in model container [2023-11-12 02:16:22,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:22" (3/3) ... [2023-11-12 02:16:22,983 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-39.i [2023-11-12 02:16:23,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:16:23,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:16:23,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:16:23,072 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;@3c3d39f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:16:23,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:16:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 100 states have internal predecessors, (150), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 02:16:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-12 02:16:23,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:23,104 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:23,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:23,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1308741177, now seen corresponding path program 1 times [2023-11-12 02:16:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482158437] [2023-11-12 02:16:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:23,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482158437] [2023-11-12 02:16:23,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:16:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148152996] [2023-11-12 02:16:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:23,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:23,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:16:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:23,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:16:23,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2023-11-12 02:16:23,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:23,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148152996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:23,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:23,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:23,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324864255] [2023-11-12 02:16:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:24,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:16:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:16:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:16:24,042 INFO L87 Difference]: Start difference. First operand has 144 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 100 states have internal predecessors, (150), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-12 02:16:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:24,096 INFO L93 Difference]: Finished difference Result 281 states and 504 transitions. [2023-11-12 02:16:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:16:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) Word has length 285 [2023-11-12 02:16:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:24,110 INFO L225 Difference]: With dead ends: 281 [2023-11-12 02:16:24,111 INFO L226 Difference]: Without dead ends: 140 [2023-11-12 02:16:24,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 284 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 02:16:24,122 INFO L413 NwaCegarLoop]: 227 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, 227 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 02:16:24,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-12 02:16:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-11-12 02:16:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 96 states have internal predecessors, (143), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 02:16:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 227 transitions. [2023-11-12 02:16:24,210 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 227 transitions. Word has length 285 [2023-11-12 02:16:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:24,211 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 227 transitions. [2023-11-12 02:16:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-12 02:16:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 227 transitions. [2023-11-12 02:16:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-12 02:16:24,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:24,221 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:24,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:24,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:24,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:24,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash 540430465, now seen corresponding path program 1 times [2023-11-12 02:16:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390707808] [2023-11-12 02:16:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:24,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192456124] [2023-11-12 02:16:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:24,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:24,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:24,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:16:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:25,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:16:25,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-12 02:16:25,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390707808] [2023-11-12 02:16:25,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192456124] [2023-11-12 02:16:25,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192456124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:16:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365153542] [2023-11-12 02:16:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:25,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:25,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:25,177 INFO L87 Difference]: Start difference. First operand 140 states and 227 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:25,297 INFO L93 Difference]: Finished difference Result 378 states and 613 transitions. [2023-11-12 02:16:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 285 [2023-11-12 02:16:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:25,315 INFO L225 Difference]: With dead ends: 378 [2023-11-12 02:16:25,315 INFO L226 Difference]: Without dead ends: 241 [2023-11-12 02:16:25,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:25,324 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 138 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:25,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 499 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:16:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-12 02:16:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2023-11-12 02:16:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 169 states have internal predecessors, (249), 67 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 66 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-12 02:16:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 383 transitions. [2023-11-12 02:16:25,416 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 383 transitions. Word has length 285 [2023-11-12 02:16:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:25,422 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 383 transitions. [2023-11-12 02:16:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 383 transitions. [2023-11-12 02:16:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:25,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:25,439 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:25,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:25,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:25,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2115457348, now seen corresponding path program 1 times [2023-11-12 02:16:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:25,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619285467] [2023-11-12 02:16:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:25,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605026519] [2023-11-12 02:16:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:25,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:25,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:25,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:16:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:26,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:26,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-12 02:16:26,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619285467] [2023-11-12 02:16:26,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605026519] [2023-11-12 02:16:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605026519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:26,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397064894] [2023-11-12 02:16:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:16:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:16:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:16:26,795 INFO L87 Difference]: Start difference. First operand 238 states and 383 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:28,094 INFO L93 Difference]: Finished difference Result 1050 states and 1692 transitions. [2023-11-12 02:16:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 286 [2023-11-12 02:16:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:28,106 INFO L225 Difference]: With dead ends: 1050 [2023-11-12 02:16:28,107 INFO L226 Difference]: Without dead ends: 815 [2023-11-12 02:16:28,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:28,112 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 628 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:28,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1629 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:16:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-11-12 02:16:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 706. [2023-11-12 02:16:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 479 states have (on average 1.4467640918580376) internal successors, (693), 483 states have internal predecessors, (693), 218 states have call successors, (218), 8 states have call predecessors, (218), 8 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-12 02:16:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1129 transitions. [2023-11-12 02:16:28,268 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1129 transitions. Word has length 286 [2023-11-12 02:16:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:28,269 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1129 transitions. [2023-11-12 02:16:28,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1129 transitions. [2023-11-12 02:16:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:28,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:28,276 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:28,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:28,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:28,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:28,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash 807702650, now seen corresponding path program 1 times [2023-11-12 02:16:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659399795] [2023-11-12 02:16:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:28,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509857623] [2023-11-12 02:16:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:28,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:28,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:28,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:16:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:28,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:28,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1653 proven. 45 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2023-11-12 02:16:29,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 78 proven. 45 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-12 02:16:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659399795] [2023-11-12 02:16:29,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509857623] [2023-11-12 02:16:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509857623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:29,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:29,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:16:29,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114310523] [2023-11-12 02:16:29,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:29,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:16:29,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:16:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:16:29,436 INFO L87 Difference]: Start difference. First operand 706 states and 1129 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-12 02:16:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:29,848 INFO L93 Difference]: Finished difference Result 994 states and 1588 transitions. [2023-11-12 02:16:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 286 [2023-11-12 02:16:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:29,854 INFO L225 Difference]: With dead ends: 994 [2023-11-12 02:16:29,854 INFO L226 Difference]: Without dead ends: 291 [2023-11-12 02:16:29,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 564 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:29,862 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 154 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:29,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 416 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:16:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-12 02:16:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 281. [2023-11-12 02:16:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 192 states have (on average 1.4427083333333333) internal successors, (277), 192 states have internal predecessors, (277), 84 states have call successors, (84), 4 states have call predecessors, (84), 4 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-12 02:16:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 445 transitions. [2023-11-12 02:16:29,941 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 445 transitions. Word has length 286 [2023-11-12 02:16:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:29,943 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 445 transitions. [2023-11-12 02:16:29,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-12 02:16:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 445 transitions. [2023-11-12 02:16:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:29,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:29,949 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:29,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:30,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1519012366, now seen corresponding path program 1 times [2023-11-12 02:16:30,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:30,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317913389] [2023-11-12 02:16:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:30,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635908185] [2023-11-12 02:16:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:30,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:30,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:16:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:30,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:16:30,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-12 02:16:30,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:30,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317913389] [2023-11-12 02:16:30,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635908185] [2023-11-12 02:16:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635908185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:30,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:16:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278658089] [2023-11-12 02:16:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:30,678 INFO L87 Difference]: Start difference. First operand 281 states and 445 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:30,749 INFO L93 Difference]: Finished difference Result 565 states and 889 transitions. [2023-11-12 02:16:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:16:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 286 [2023-11-12 02:16:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:30,754 INFO L225 Difference]: With dead ends: 565 [2023-11-12 02:16:30,754 INFO L226 Difference]: Without dead ends: 287 [2023-11-12 02:16:30,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:30,756 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 161 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:30,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 314 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-12 02:16:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-12 02:16:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 196 states have (on average 1.403061224489796) internal successors, (275), 196 states have internal predecessors, (275), 84 states have call successors, (84), 6 states have call predecessors, (84), 6 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-12 02:16:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 443 transitions. [2023-11-12 02:16:30,793 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 443 transitions. Word has length 286 [2023-11-12 02:16:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:30,797 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 443 transitions. [2023-11-12 02:16:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 443 transitions. [2023-11-12 02:16:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:30,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:30,803 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:30,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:31,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:31,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash 859480844, now seen corresponding path program 1 times [2023-11-12 02:16:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802413843] [2023-11-12 02:16:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:31,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:31,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740299995] [2023-11-12 02:16:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:31,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:31,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:16:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:31,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:16:31,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-12 02:16:31,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:31,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802413843] [2023-11-12 02:16:31,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:31,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740299995] [2023-11-12 02:16:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740299995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:31,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:31,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:31,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222328101] [2023-11-12 02:16:31,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:31,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:31,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:31,882 INFO L87 Difference]: Start difference. First operand 287 states and 443 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:31,985 INFO L93 Difference]: Finished difference Result 849 states and 1311 transitions. [2023-11-12 02:16:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 286 [2023-11-12 02:16:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:31,991 INFO L225 Difference]: With dead ends: 849 [2023-11-12 02:16:31,991 INFO L226 Difference]: Without dead ends: 565 [2023-11-12 02:16:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:31,994 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 421 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-11-12 02:16:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 559. [2023-11-12 02:16:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 378 states have (on average 1.3862433862433863) internal successors, (524), 378 states have internal predecessors, (524), 168 states have call successors, (168), 12 states have call predecessors, (168), 12 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-12 02:16:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 860 transitions. [2023-11-12 02:16:32,064 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 860 transitions. Word has length 286 [2023-11-12 02:16:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:32,065 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 860 transitions. [2023-11-12 02:16:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-12 02:16:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 860 transitions. [2023-11-12 02:16:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:32,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:32,074 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:32,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:16:32,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:32,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:32,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 272674830, now seen corresponding path program 1 times [2023-11-12 02:16:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:32,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143773408] [2023-11-12 02:16:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:32,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:32,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685927624] [2023-11-12 02:16:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:32,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:32,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:32,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:32,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:16:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:32,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:16:32,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 893 proven. 105 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2023-11-12 02:16:34,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-12 02:16:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143773408] [2023-11-12 02:16:36,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685927624] [2023-11-12 02:16:36,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685927624] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:36,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:36,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-12 02:16:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743312788] [2023-11-12 02:16:36,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:36,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:36,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:36,772 INFO L87 Difference]: Start difference. First operand 559 states and 860 transitions. Second operand has 13 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-12 02:16:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:39,776 INFO L93 Difference]: Finished difference Result 3391 states and 5174 transitions. [2023-11-12 02:16:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:16:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) Word has length 286 [2023-11-12 02:16:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:39,810 INFO L225 Difference]: With dead ends: 3391 [2023-11-12 02:16:39,810 INFO L226 Difference]: Without dead ends: 2835 [2023-11-12 02:16:39,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:16:39,817 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 1615 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:39,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 1647 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 02:16:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2023-11-12 02:16:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2753. [2023-11-12 02:16:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 1968 states have (on average 1.4166666666666667) internal successors, (2788), 1976 states have internal predecessors, (2788), 720 states have call successors, (720), 64 states have call predecessors, (720), 64 states have return successors, (720), 712 states have call predecessors, (720), 720 states have call successors, (720) [2023-11-12 02:16:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4228 transitions. [2023-11-12 02:16:40,265 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4228 transitions. Word has length 286 [2023-11-12 02:16:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:40,266 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 4228 transitions. [2023-11-12 02:16:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-12 02:16:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4228 transitions. [2023-11-12 02:16:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:40,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:40,273 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:40,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:40,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:40,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:40,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1532763504, now seen corresponding path program 1 times [2023-11-12 02:16:40,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:40,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916355908] [2023-11-12 02:16:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:40,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:40,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461429025] [2023-11-12 02:16:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:40,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:40,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:16:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:40,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:16:40,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 893 proven. 105 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2023-11-12 02:16:41,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-12 02:16:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:41,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916355908] [2023-11-12 02:16:41,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:41,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461429025] [2023-11-12 02:16:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461429025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:41,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:41,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 02:16:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35355561] [2023-11-12 02:16:41,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:16:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:16:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:16:41,671 INFO L87 Difference]: Start difference. First operand 2753 states and 4228 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-12 02:16:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:42,522 INFO L93 Difference]: Finished difference Result 5647 states and 8589 transitions. [2023-11-12 02:16:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) Word has length 286 [2023-11-12 02:16:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:42,544 INFO L225 Difference]: With dead ends: 5647 [2023-11-12 02:16:42,544 INFO L226 Difference]: Without dead ends: 2897 [2023-11-12 02:16:42,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:16:42,554 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 399 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:42,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 462 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:16:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-11-12 02:16:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2785. [2023-11-12 02:16:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 1992 states have (on average 1.4016064257028114) internal successors, (2792), 2000 states have internal predecessors, (2792), 720 states have call successors, (720), 72 states have call predecessors, (720), 72 states have return successors, (720), 712 states have call predecessors, (720), 720 states have call successors, (720) [2023-11-12 02:16:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4232 transitions. [2023-11-12 02:16:43,017 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4232 transitions. Word has length 286 [2023-11-12 02:16:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:43,018 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 4232 transitions. [2023-11-12 02:16:43,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-12 02:16:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4232 transitions. [2023-11-12 02:16:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:43,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:43,022 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:43,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:16:43,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:43,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1109116782, now seen corresponding path program 1 times [2023-11-12 02:16:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031955367] [2023-11-12 02:16:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:43,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:43,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013735169] [2023-11-12 02:16:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:43,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:43,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:43,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:16:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:43,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:16:43,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1301 proven. 93 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2023-11-12 02:16:45,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 30 proven. 93 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-12 02:16:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031955367] [2023-11-12 02:16:46,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013735169] [2023-11-12 02:16:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013735169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:46,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-11-12 02:16:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555331382] [2023-11-12 02:16:46,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:16:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:16:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:16:46,973 INFO L87 Difference]: Start difference. First operand 2785 states and 4232 transitions. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-12 02:16:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:50,026 INFO L93 Difference]: Finished difference Result 6499 states and 9777 transitions. [2023-11-12 02:16:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:16:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) Word has length 286 [2023-11-12 02:16:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:50,071 INFO L225 Difference]: With dead ends: 6499 [2023-11-12 02:16:50,071 INFO L226 Difference]: Without dead ends: 5107 [2023-11-12 02:16:50,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 02:16:50,084 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1769 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:50,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1810 Valid, 1921 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 02:16:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2023-11-12 02:16:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3727. [2023-11-12 02:16:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2754 states have (on average 1.4153957879448076) internal successors, (3898), 2774 states have internal predecessors, (3898), 866 states have call successors, (866), 106 states have call predecessors, (866), 106 states have return successors, (866), 846 states have call predecessors, (866), 866 states have call successors, (866) [2023-11-12 02:16:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5630 transitions. [2023-11-12 02:16:50,767 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5630 transitions. Word has length 286 [2023-11-12 02:16:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:50,768 INFO L495 AbstractCegarLoop]: Abstraction has 3727 states and 5630 transitions. [2023-11-12 02:16:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-12 02:16:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5630 transitions. [2023-11-12 02:16:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:16:50,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:50,773 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:50,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:16:50,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:50,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -890262064, now seen corresponding path program 1 times [2023-11-12 02:16:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438522585] [2023-11-12 02:16:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:51,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:16:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572002652] [2023-11-12 02:16:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:51,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:51,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:16:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:51,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:16:51,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 2054 proven. 306 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2023-11-12 02:16:54,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438522585] [2023-11-12 02:16:57,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:16:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572002652] [2023-11-12 02:16:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572002652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:57,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:16:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-12 02:16:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010780974] [2023-11-12 02:16:57,157 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:57,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:16:57,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:16:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:16:57,162 INFO L87 Difference]: Start difference. First operand 3727 states and 5630 transitions. Second operand has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 17 states have internal predecessors, (103), 6 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2023-11-12 02:17:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:17:00,640 INFO L93 Difference]: Finished difference Result 9609 states and 13888 transitions. [2023-11-12 02:17:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-12 02:17:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 17 states have internal predecessors, (103), 6 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) Word has length 286 [2023-11-12 02:17:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:17:00,692 INFO L225 Difference]: With dead ends: 9609 [2023-11-12 02:17:00,693 INFO L226 Difference]: Without dead ends: 6109 [2023-11-12 02:17:00,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=721, Invalid=2141, Unknown=0, NotChecked=0, Total=2862 [2023-11-12 02:17:00,709 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1144 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:17:00,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 743 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:17:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2023-11-12 02:17:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5777. [2023-11-12 02:17:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 4348 states have (on average 1.3732750689972402) internal successors, (5971), 4386 states have internal predecessors, (5971), 1086 states have call successors, (1086), 342 states have call predecessors, (1086), 342 states have return successors, (1086), 1048 states have call predecessors, (1086), 1086 states have call successors, (1086) [2023-11-12 02:17:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 8143 transitions. [2023-11-12 02:17:01,736 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 8143 transitions. Word has length 286 [2023-11-12 02:17:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:17:01,737 INFO L495 AbstractCegarLoop]: Abstraction has 5777 states and 8143 transitions. [2023-11-12 02:17:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 17 states have internal predecessors, (103), 6 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2023-11-12 02:17:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 8143 transitions. [2023-11-12 02:17:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-12 02:17:01,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:17:01,743 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:01,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-12 02:17:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:17:01,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:17:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1543644900, now seen corresponding path program 1 times [2023-11-12 02:17:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:01,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92505118] [2023-11-12 02:17:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:02,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:17:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992698523] [2023-11-12 02:17:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:02,007 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:02,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d069103c-c6cd-4214-81f0-5bfe85957e26/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process