./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/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 c9b50f113379d6dd32c9227ee2a149aa46425a55ff517b54eccf6b1bc662e210 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:22:32,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:22:32,114 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:22:32,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:22:32,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:22:32,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:22:32,159 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:22:32,164 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:22:32,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:22:32,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:22:32,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:22:32,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:22:32,167 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:22:32,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:22:32,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:22:32,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:22:32,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:22:32,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:22:32,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:22:32,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:22:32,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:22:32,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:22:32,179 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:22:32,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:22:32,180 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:22:32,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:22:32,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:22:32,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:22:32,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:32,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:22:32,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:22:32,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:22:32,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:22:32,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:22:32,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:22:32,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:22:32,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:22:32,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:22:32,185 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:22:32,186 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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9b50f113379d6dd32c9227ee2a149aa46425a55ff517b54eccf6b1bc662e210 [2023-11-12 02:22:32,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:22:32,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:22:32,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:22:32,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:22:32,459 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:22:32,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.i [2023-11-12 02:22:35,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:35,985 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:35,986 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.i [2023-11-12 02:22:35,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/data/172135b96/957f0e5d5fa24f039f898b629450960b/FLAGc969100b2 [2023-11-12 02:22:36,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/data/172135b96/957f0e5d5fa24f039f898b629450960b [2023-11-12 02:22:36,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:36,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:36,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:36,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:36,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:36,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b7c2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36, skipping insertion in model container [2023-11-12 02:22:36,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,094 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:36,228 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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.i[916,929] [2023-11-12 02:22:36,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:36,466 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:36,488 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_57554e20-f6a3-4c82-9c5e-21b05435d0c8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-34.i[916,929] [2023-11-12 02:22:36,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:36,583 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:36,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36 WrapperNode [2023-11-12 02:22:36,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:36,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:36,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:36,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:36,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,708 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 417 [2023-11-12 02:22:36,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:36,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:36,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:36,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:36,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:36,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:36,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:36,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:36,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (1/1) ... [2023-11-12 02:22:36,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:36,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:36,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:36,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:22:36,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:22:36,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:36,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:36,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:37,129 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:37,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:38,046 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:38,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:38,055 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:22:38,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:38 BoogieIcfgContainer [2023-11-12 02:22:38,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:38,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:38,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:38,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:38,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:36" (1/3) ... [2023-11-12 02:22:38,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290ae697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:38, skipping insertion in model container [2023-11-12 02:22:38,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:36" (2/3) ... [2023-11-12 02:22:38,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290ae697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:38, skipping insertion in model container [2023-11-12 02:22:38,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:38" (3/3) ... [2023-11-12 02:22:38,068 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-34.i [2023-11-12 02:22:38,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:38,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:38,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:38,149 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;@263f2deb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:38,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:22:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 125 states have (on average 1.536) internal successors, (192), 126 states have internal predecessors, (192), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:22:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-12 02:22:38,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:38,185 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:38,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:38,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1678588054, now seen corresponding path program 1 times [2023-11-12 02:22:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:38,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10234932] [2023-11-12 02:22:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10234932] [2023-11-12 02:22:38,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:22:38,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120422689] [2023-11-12 02:22:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:38,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:38,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:38,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:38,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:38,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:22:38,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2023-11-12 02:22:38,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:38,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120422689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:38,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:38,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965562779] [2023-11-12 02:22:38,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:22:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:22:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:22:39,043 INFO L87 Difference]: Start difference. First operand has 172 states, 125 states have (on average 1.536) internal successors, (192), 126 states have internal predecessors, (192), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-12 02:22:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:39,104 INFO L93 Difference]: Finished difference Result 337 states and 598 transitions. [2023-11-12 02:22:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:22:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) Word has length 300 [2023-11-12 02:22:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:39,118 INFO L225 Difference]: With dead ends: 337 [2023-11-12 02:22:39,118 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:22:39,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 299 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 02:22:39,127 INFO L413 NwaCegarLoop]: 272 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, 272 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 02:22:39,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:22:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-12 02:22:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 122 states have internal predecessors, (184), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:22:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 272 transitions. [2023-11-12 02:22:39,198 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 272 transitions. Word has length 300 [2023-11-12 02:22:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:39,199 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 272 transitions. [2023-11-12 02:22:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-12 02:22:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 272 transitions. [2023-11-12 02:22:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-12 02:22:39,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:39,208 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:39,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:39,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:39,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1933837446, now seen corresponding path program 1 times [2023-11-12 02:22:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:39,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095023553] [2023-11-12 02:22:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:39,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:39,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113164977] [2023-11-12 02:22:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:39,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:39,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:39,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:39,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-12 02:22:40,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:40,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095023553] [2023-11-12 02:22:40,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113164977] [2023-11-12 02:22:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113164977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:40,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:40,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752088022] [2023-11-12 02:22:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:40,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:40,355 INFO L87 Difference]: Start difference. First operand 168 states and 272 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:40,441 INFO L93 Difference]: Finished difference Result 498 states and 810 transitions. [2023-11-12 02:22:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 300 [2023-11-12 02:22:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:40,449 INFO L225 Difference]: With dead ends: 498 [2023-11-12 02:22:40,449 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 02:22:40,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 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 02:22:40,453 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 115 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:40,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 524 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 02:22:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 327. [2023-11-12 02:22:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 236 states have (on average 1.5) internal successors, (354), 236 states have internal predecessors, (354), 88 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-12 02:22:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 530 transitions. [2023-11-12 02:22:40,516 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 530 transitions. Word has length 300 [2023-11-12 02:22:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:40,518 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 530 transitions. [2023-11-12 02:22:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 530 transitions. [2023-11-12 02:22:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-12 02:22:40,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:40,531 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:40,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:22:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:40,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:40,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash 672186108, now seen corresponding path program 1 times [2023-11-12 02:22:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707555335] [2023-11-12 02:22:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:40,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437215482] [2023-11-12 02:22:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:40,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:40,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:41,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:41,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-12 02:22:41,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707555335] [2023-11-12 02:22:41,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437215482] [2023-11-12 02:22:41,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437215482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:41,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:41,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:41,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113121016] [2023-11-12 02:22:41,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:41,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:41,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:41,230 INFO L87 Difference]: Start difference. First operand 327 states and 530 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:41,361 INFO L93 Difference]: Finished difference Result 889 states and 1440 transitions. [2023-11-12 02:22:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 300 [2023-11-12 02:22:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:41,373 INFO L225 Difference]: With dead ends: 889 [2023-11-12 02:22:41,373 INFO L226 Difference]: Without dead ends: 565 [2023-11-12 02:22:41,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 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 02:22:41,378 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 185 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 695 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-11-12 02:22:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 561. [2023-11-12 02:22:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 430 states have (on average 1.5209302325581395) internal successors, (654), 432 states have internal predecessors, (654), 126 states have call successors, (126), 4 states have call predecessors, (126), 4 states have return successors, (126), 124 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-12 02:22:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 906 transitions. [2023-11-12 02:22:41,465 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 906 transitions. Word has length 300 [2023-11-12 02:22:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 906 transitions. [2023-11-12 02:22:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 906 transitions. [2023-11-12 02:22:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-12 02:22:41,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:41,473 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:41,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:41,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:41,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:41,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash 302358332, now seen corresponding path program 1 times [2023-11-12 02:22:41,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:41,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436738883] [2023-11-12 02:22:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:41,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:41,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282177777] [2023-11-12 02:22:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:41,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:41,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:42,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-12 02:22:42,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436738883] [2023-11-12 02:22:42,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282177777] [2023-11-12 02:22:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282177777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:42,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:42,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:42,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320982080] [2023-11-12 02:22:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:42,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:42,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:42,100 INFO L87 Difference]: Start difference. First operand 561 states and 906 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:42,245 INFO L93 Difference]: Finished difference Result 1601 states and 2574 transitions. [2023-11-12 02:22:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 300 [2023-11-12 02:22:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:42,282 INFO L225 Difference]: With dead ends: 1601 [2023-11-12 02:22:42,282 INFO L226 Difference]: Without dead ends: 1043 [2023-11-12 02:22:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 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 02:22:42,286 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 226 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 548 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2023-11-12 02:22:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 677. [2023-11-12 02:22:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 546 states have (on average 1.5054945054945055) internal successors, (822), 548 states have internal predecessors, (822), 126 states have call successors, (126), 4 states have call predecessors, (126), 4 states have return successors, (126), 124 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-12 02:22:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1074 transitions. [2023-11-12 02:22:42,387 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1074 transitions. Word has length 300 [2023-11-12 02:22:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:42,388 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1074 transitions. [2023-11-12 02:22:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1074 transitions. [2023-11-12 02:22:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-12 02:22:42,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:42,396 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:42,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:42,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:42,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:42,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash -541647170, now seen corresponding path program 1 times [2023-11-12 02:22:42,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:42,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142319209] [2023-11-12 02:22:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:42,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533399021] [2023-11-12 02:22:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:42,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:42,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:43,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:22:43,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1845 proven. 78 refuted. 0 times theorem prover too weak. 1861 trivial. 0 not checked. [2023-11-12 02:22:43,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-12 02:22:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:43,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142319209] [2023-11-12 02:22:43,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:43,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533399021] [2023-11-12 02:22:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533399021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:43,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:43,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-12 02:22:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019390352] [2023-11-12 02:22:43,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:43,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:22:43,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:22:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:43,711 INFO L87 Difference]: Start difference. First operand 677 states and 1074 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-12 02:22:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:44,594 INFO L93 Difference]: Finished difference Result 1845 states and 2885 transitions. [2023-11-12 02:22:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:22:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 300 [2023-11-12 02:22:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:44,608 INFO L225 Difference]: With dead ends: 1845 [2023-11-12 02:22:44,608 INFO L226 Difference]: Without dead ends: 1171 [2023-11-12 02:22:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 591 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:22:44,613 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 677 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:44,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 933 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:22:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-12 02:22:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 939. [2023-11-12 02:22:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 720 states have (on average 1.4444444444444444) internal successors, (1040), 725 states have internal predecessors, (1040), 206 states have call successors, (206), 12 states have call predecessors, (206), 12 states have return successors, (206), 201 states have call predecessors, (206), 206 states have call successors, (206) [2023-11-12 02:22:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1452 transitions. [2023-11-12 02:22:44,742 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1452 transitions. Word has length 300 [2023-11-12 02:22:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:44,743 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1452 transitions. [2023-11-12 02:22:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-12 02:22:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1452 transitions. [2023-11-12 02:22:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-12 02:22:44,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:44,752 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:44,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:44,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:44,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:44,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -473031037, now seen corresponding path program 1 times [2023-11-12 02:22:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327043923] [2023-11-12 02:22:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:45,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960518829] [2023-11-12 02:22:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:45,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:45,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:45,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:22:45,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-12 02:22:46,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327043923] [2023-11-12 02:22:46,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960518829] [2023-11-12 02:22:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960518829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:46,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:46,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843230296] [2023-11-12 02:22:46,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:46,531 INFO L87 Difference]: Start difference. First operand 939 states and 1452 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:46,895 INFO L93 Difference]: Finished difference Result 2471 states and 3834 transitions. [2023-11-12 02:22:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 301 [2023-11-12 02:22:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:46,909 INFO L225 Difference]: With dead ends: 2471 [2023-11-12 02:22:46,909 INFO L226 Difference]: Without dead ends: 1564 [2023-11-12 02:22:46,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:46,916 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 193 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:46,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 774 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2023-11-12 02:22:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1117. [2023-11-12 02:22:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 936 states have (on average 1.5213675213675213) internal successors, (1424), 938 states have internal predecessors, (1424), 170 states have call successors, (170), 10 states have call predecessors, (170), 10 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-12 02:22:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1764 transitions. [2023-11-12 02:22:47,077 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1764 transitions. Word has length 301 [2023-11-12 02:22:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:47,077 INFO L495 AbstractCegarLoop]: Abstraction has 1117 states and 1764 transitions. [2023-11-12 02:22:47,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-12 02:22:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1764 transitions. [2023-11-12 02:22:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-12 02:22:47,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:47,086 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:47,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:22:47,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:22:47,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:47,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2142788019, now seen corresponding path program 1 times [2023-11-12 02:22:47,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:47,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941054968] [2023-11-12 02:22:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:47,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:47,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:47,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061391095] [2023-11-12 02:22:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:47,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:47,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:47,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:47,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:47,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:22:47,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1002 proven. 228 refuted. 0 times theorem prover too weak. 2554 trivial. 0 not checked. [2023-11-12 02:22:48,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-12 02:22:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941054968] [2023-11-12 02:22:49,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061391095] [2023-11-12 02:22:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061391095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:49,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:49,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-12 02:22:49,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356276275] [2023-11-12 02:22:49,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:22:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:22:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:22:49,470 INFO L87 Difference]: Start difference. First operand 1117 states and 1764 transitions. Second operand has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 4 states have call successors, (85), 3 states have call predecessors, (85), 6 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-12 02:22:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:50,625 INFO L93 Difference]: Finished difference Result 2463 states and 3803 transitions. [2023-11-12 02:22:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:22:50,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 4 states have call successors, (85), 3 states have call predecessors, (85), 6 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) Word has length 302 [2023-11-12 02:22:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:50,637 INFO L225 Difference]: With dead ends: 2463 [2023-11-12 02:22:50,637 INFO L226 Difference]: Without dead ends: 1465 [2023-11-12 02:22:50,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:22:50,641 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 719 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:50,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 793 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:22:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2023-11-12 02:22:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1431. [2023-11-12 02:22:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1232 states have (on average 1.4813311688311688) internal successors, (1825), 1236 states have internal predecessors, (1825), 174 states have call successors, (174), 24 states have call predecessors, (174), 24 states have return successors, (174), 170 states have call predecessors, (174), 174 states have call successors, (174) [2023-11-12 02:22:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2173 transitions. [2023-11-12 02:22:50,764 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2173 transitions. Word has length 302 [2023-11-12 02:22:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:50,766 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2173 transitions. [2023-11-12 02:22:50,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 4 states have call successors, (85), 3 states have call predecessors, (85), 6 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-12 02:22:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2173 transitions. [2023-11-12 02:22:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-12 02:22:50,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:50,772 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:50,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 02:22:50,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:22:50,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:50,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1633314929, now seen corresponding path program 1 times [2023-11-12 02:22:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069348445] [2023-11-12 02:22:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:50,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:51,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858947643] [2023-11-12 02:22:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:51,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:51,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:51,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:51,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 02:22:51,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 2131 proven. 162 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2023-11-12 02:22:54,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069348445] [2023-11-12 02:22:57,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858947643] [2023-11-12 02:22:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858947643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:57,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-12 02:22:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150652003] [2023-11-12 02:22:57,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:22:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:22:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:22:57,287 INFO L87 Difference]: Start difference. First operand 1431 states and 2173 transitions. Second operand has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 21 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-11-12 02:23:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:02,183 INFO L93 Difference]: Finished difference Result 4473 states and 6619 transitions. [2023-11-12 02:23:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:23:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 21 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) Word has length 302 [2023-11-12 02:23:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:02,202 INFO L225 Difference]: With dead ends: 4473 [2023-11-12 02:23:02,203 INFO L226 Difference]: Without dead ends: 3143 [2023-11-12 02:23:02,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=669, Invalid=3237, Unknown=0, NotChecked=0, Total=3906 [2023-11-12 02:23:02,208 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 1359 mSDsluCounter, 3320 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 3773 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:02,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 3773 Invalid, 2946 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [206 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 02:23:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2023-11-12 02:23:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 2533. [2023-11-12 02:23:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 2188 states have (on average 1.4542961608775138) internal successors, (3182), 2198 states have internal predecessors, (3182), 284 states have call successors, (284), 60 states have call predecessors, (284), 60 states have return successors, (284), 274 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-12 02:23:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3750 transitions. [2023-11-12 02:23:02,434 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3750 transitions. Word has length 302 [2023-11-12 02:23:02,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:02,435 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 3750 transitions. [2023-11-12 02:23:02,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 21 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-11-12 02:23:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3750 transitions. [2023-11-12 02:23:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-12 02:23:02,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:02,441 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:02,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:23:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:02,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1152234671, now seen corresponding path program 1 times [2023-11-12 02:23:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731317074] [2023-11-12 02:23:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:02,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575811900] [2023-11-12 02:23:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:02,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:02,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:23:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:03,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:23:03,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 2131 proven. 162 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2023-11-12 02:23:05,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:07,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:07,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731317074] [2023-11-12 02:23:07,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:07,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575811900] [2023-11-12 02:23:07,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575811900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:07,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-12 02:23:07,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578702051] [2023-11-12 02:23:07,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:07,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:23:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:23:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:23:07,911 INFO L87 Difference]: Start difference. First operand 2533 states and 3750 transitions. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 18 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-11-12 02:23:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:12,242 INFO L93 Difference]: Finished difference Result 6413 states and 9366 transitions. [2023-11-12 02:23:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-12 02:23:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 18 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) Word has length 302 [2023-11-12 02:23:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:12,275 INFO L225 Difference]: With dead ends: 6413 [2023-11-12 02:23:12,276 INFO L226 Difference]: Without dead ends: 5447 [2023-11-12 02:23:12,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1468, Invalid=3934, Unknown=0, NotChecked=0, Total=5402 [2023-11-12 02:23:12,285 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 1025 mSDsluCounter, 2648 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 3128 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-12 02:23:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2023-11-12 02:23:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 4310. [2023-11-12 02:23:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 3675 states have (on average 1.445986394557823) internal successors, (5314), 3691 states have internal predecessors, (5314), 512 states have call successors, (512), 122 states have call predecessors, (512), 122 states have return successors, (512), 496 states have call predecessors, (512), 512 states have call successors, (512) [2023-11-12 02:23:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 6338 transitions. [2023-11-12 02:23:12,682 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 6338 transitions. Word has length 302 [2023-11-12 02:23:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:12,683 INFO L495 AbstractCegarLoop]: Abstraction has 4310 states and 6338 transitions. [2023-11-12 02:23:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 18 states have internal predecessors, (106), 5 states have call successors, (44), 5 states have call predecessors, (44), 8 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-11-12 02:23:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 6338 transitions. [2023-11-12 02:23:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-12 02:23:12,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:12,690 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:12,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:12,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:12,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1203570579, now seen corresponding path program 1 times [2023-11-12 02:23:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486428873] [2023-11-12 02:23:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:12,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:12,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769872642] [2023-11-12 02:23:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:12,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:12,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:12,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:23:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:23:13,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1591 proven. 57 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2023-11-12 02:23:14,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486428873] [2023-11-12 02:23:15,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769872642] [2023-11-12 02:23:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769872642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:15,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:15,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-12 02:23:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42330758] [2023-11-12 02:23:15,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:15,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:23:15,515 INFO L87 Difference]: Start difference. First operand 4310 states and 6338 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 4 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-12 02:23:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:19,348 INFO L93 Difference]: Finished difference Result 8355 states and 12127 transitions. [2023-11-12 02:23:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-12 02:23:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 4 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 302 [2023-11-12 02:23:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:19,394 INFO L225 Difference]: With dead ends: 8355 [2023-11-12 02:23:19,395 INFO L226 Difference]: Without dead ends: 5747 [2023-11-12 02:23:19,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2023-11-12 02:23:19,404 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 938 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 3915 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:19,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 3915 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-12 02:23:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2023-11-12 02:23:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 3845. [2023-11-12 02:23:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3257 states have (on average 1.4356770033773412) internal successors, (4676), 3271 states have internal predecessors, (4676), 474 states have call successors, (474), 113 states have call predecessors, (474), 113 states have return successors, (474), 460 states have call predecessors, (474), 474 states have call successors, (474) [2023-11-12 02:23:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 5624 transitions. [2023-11-12 02:23:19,790 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 5624 transitions. Word has length 302 [2023-11-12 02:23:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:19,791 INFO L495 AbstractCegarLoop]: Abstraction has 3845 states and 5624 transitions. [2023-11-12 02:23:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 4 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-11-12 02:23:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 5624 transitions. [2023-11-12 02:23:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-12 02:23:19,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:19,798 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:19,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:20,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:23:20,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:20,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1590944612, now seen corresponding path program 1 times [2023-11-12 02:23:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:20,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428111625] [2023-11-12 02:23:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:20,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:20,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448081136] [2023-11-12 02:23:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:20,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:20,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:20,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57554e20-f6a3-4c82-9c5e-21b05435d0c8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:23:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:23:20,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1663 proven. 39 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2023-11-12 02:23:20,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-12 02:23:20,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:20,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428111625] [2023-11-12 02:23:20,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:20,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448081136] [2023-11-12 02:23:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448081136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:20,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:20,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:23:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374899271] [2023-11-12 02:23:20,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:20,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:23:20,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:23:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:20,902 INFO L87 Difference]: Start difference. First operand 3845 states and 5624 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58)