./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme --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 fd402a6ef9e9ef8fde991483a65d8e37bbf5b039b44d2d76963c18928dff03d5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:54,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:54,206 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:54,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:54,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:54,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:54,258 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:54,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:54,260 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:54,265 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:54,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:54,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:54,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:54,269 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:54,269 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:54,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:54,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:54,271 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:54,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:54,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:54,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:54,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:54,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:54,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:54,275 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:54,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:54,276 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:54,277 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:54,277 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:54,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:54,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:54,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:54,281 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:54,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:54,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:54,282 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:54,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:54,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:54,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:54,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:54,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:54,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:54,285 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_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd402a6ef9e9ef8fde991483a65d8e37bbf5b039b44d2d76963c18928dff03d5 [2023-11-26 11:55:54,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:54,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:54,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:54,616 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:54,617 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:54,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i [2023-11-26 11:55:57,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:58,110 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:58,111 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i [2023-11-26 11:55:58,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/data/4e5be7330/ed1b917e737948f5a2b24a7ba0470b0b/FLAG1a5fe9a16 [2023-11-26 11:55:58,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/data/4e5be7330/ed1b917e737948f5a2b24a7ba0470b0b [2023-11-26 11:55:58,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:58,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:58,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:58,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:58,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:58,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63be3c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58, skipping insertion in model container [2023-11-26 11:55:58,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,209 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:58,423 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_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i[916,929] [2023-11-26 11:55:58,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:58,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:58,628 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_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-88.i[916,929] [2023-11-26 11:55:58,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:58,819 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:58,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58 WrapperNode [2023-11-26 11:55:58,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:58,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:58,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:58,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:58,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,927 INFO L138 Inliner]: procedures = 26, calls = 104, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 610 [2023-11-26 11:55:58,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:58,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:58,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:58,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:58,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:58,957 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,076 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:55:59,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:59,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:59,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:59,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:59,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (1/1) ... [2023-11-26 11:55:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:59,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:59,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:59,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:59,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:55:59,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:55:59,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:59,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:59,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:59,453 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:59,455 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:56:00,409 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:56:00,480 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:56:00,483 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:56:00,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:00 BoogieIcfgContainer [2023-11-26 11:56:00,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:56:00,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:56:00,488 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:56:00,491 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:56:00,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:58" (1/3) ... [2023-11-26 11:56:00,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba02e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:00, skipping insertion in model container [2023-11-26 11:56:00,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:58" (2/3) ... [2023-11-26 11:56:00,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba02e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:00, skipping insertion in model container [2023-11-26 11:56:00,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:00" (3/3) ... [2023-11-26 11:56:00,495 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-88.i [2023-11-26 11:56:00,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:56:00,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:56:00,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:56:00,603 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;@24a89d49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:56:00,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:56:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 250 states, 156 states have (on average 1.5705128205128205) internal successors, (245), 157 states have internal predecessors, (245), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 11:56:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:56:00,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:00,689 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:00,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:00,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1656814484, now seen corresponding path program 1 times [2023-11-26 11:56:00,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:00,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184517595] [2023-11-26 11:56:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:01,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:01,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184517595] [2023-11-26 11:56:01,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:56:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308566985] [2023-11-26 11:56:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:01,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:01,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:01,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:56:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:01,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:56:01,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2023-11-26 11:56:01,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:01,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308566985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:01,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:01,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852978372] [2023-11-26 11:56:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:56:01,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:56:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:56:02,002 INFO L87 Difference]: Start difference. First operand has 250 states, 156 states have (on average 1.5705128205128205) internal successors, (245), 157 states have internal predecessors, (245), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 11:56:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:02,115 INFO L93 Difference]: Finished difference Result 495 states and 940 transitions. [2023-11-26 11:56:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:56:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) Word has length 552 [2023-11-26 11:56:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:02,145 INFO L225 Difference]: With dead ends: 495 [2023-11-26 11:56:02,145 INFO L226 Difference]: Without dead ends: 246 [2023-11-26 11:56:02,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:56:02,162 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:02,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 414 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:56:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-26 11:56:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-26 11:56:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 153 states have (on average 1.5359477124183007) internal successors, (235), 153 states have internal predecessors, (235), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 11:56:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 417 transitions. [2023-11-26 11:56:02,269 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 417 transitions. Word has length 552 [2023-11-26 11:56:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:02,270 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 417 transitions. [2023-11-26 11:56:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 11:56:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 417 transitions. [2023-11-26 11:56:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:02,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:02,288 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:02,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:02,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:02,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1453797657, now seen corresponding path program 1 times [2023-11-26 11:56:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:02,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949645203] [2023-11-26 11:56:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:02,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:02,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863088835] [2023-11-26 11:56:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:02,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:02,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:02,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:56:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:03,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:56:03,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 11:56:03,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949645203] [2023-11-26 11:56:03,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863088835] [2023-11-26 11:56:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863088835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:03,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:03,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604196578] [2023-11-26 11:56:03,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:03,212 INFO L87 Difference]: Start difference. First operand 246 states and 417 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 11:56:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:03,358 INFO L93 Difference]: Finished difference Result 669 states and 1134 transitions. [2023-11-26 11:56:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 553 [2023-11-26 11:56:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:03,370 INFO L225 Difference]: With dead ends: 669 [2023-11-26 11:56:03,370 INFO L226 Difference]: Without dead ends: 424 [2023-11-26 11:56:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:03,374 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 286 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:03,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 971 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:56:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-26 11:56:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 421. [2023-11-26 11:56:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 265 states have (on average 1.5320754716981133) internal successors, (406), 266 states have internal predecessors, (406), 153 states have call successors, (153), 2 states have call predecessors, (153), 2 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:56:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 712 transitions. [2023-11-26 11:56:03,486 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 712 transitions. Word has length 553 [2023-11-26 11:56:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 712 transitions. [2023-11-26 11:56:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 11:56:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 712 transitions. [2023-11-26 11:56:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:03,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:03,502 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:03,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:03,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:03,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:03,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1515837271, now seen corresponding path program 1 times [2023-11-26 11:56:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:03,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11850540] [2023-11-26 11:56:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:03,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:03,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195817941] [2023-11-26 11:56:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:03,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:03,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:56:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:04,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:56:04,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 2730 proven. 246 refuted. 0 times theorem prover too weak. 13404 trivial. 0 not checked. [2023-11-26 11:56:05,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 24 proven. 246 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-26 11:56:05,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11850540] [2023-11-26 11:56:05,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195817941] [2023-11-26 11:56:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195817941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:05,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:05,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 11:56:05,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975432899] [2023-11-26 11:56:05,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:05,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:56:05,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:05,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:56:05,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:56:05,995 INFO L87 Difference]: Start difference. First operand 421 states and 712 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 2 states have call predecessors, (174), 2 states have call successors, (174) [2023-11-26 11:56:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:06,782 INFO L93 Difference]: Finished difference Result 857 states and 1437 transitions. [2023-11-26 11:56:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:56:06,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 2 states have call predecessors, (174), 2 states have call successors, (174) Word has length 553 [2023-11-26 11:56:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:06,796 INFO L225 Difference]: With dead ends: 857 [2023-11-26 11:56:06,796 INFO L226 Difference]: Without dead ends: 437 [2023-11-26 11:56:06,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 1096 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:56:06,803 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 306 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:06,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1083 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:56:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-26 11:56:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 429. [2023-11-26 11:56:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 271 states have (on average 1.5129151291512914) internal successors, (410), 272 states have internal predecessors, (410), 153 states have call successors, (153), 4 states have call predecessors, (153), 4 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:56:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 716 transitions. [2023-11-26 11:56:06,873 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 716 transitions. Word has length 553 [2023-11-26 11:56:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:06,875 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 716 transitions. [2023-11-26 11:56:06,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 2 states have call predecessors, (174), 2 states have call successors, (174) [2023-11-26 11:56:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 716 transitions. [2023-11-26 11:56:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:06,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:06,884 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:06,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:07,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:07,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1573095573, now seen corresponding path program 1 times [2023-11-26 11:56:07,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:07,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892173635] [2023-11-26 11:56:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:07,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:07,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:07,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241418245] [2023-11-26 11:56:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:07,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:07,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:56:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:07,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:56:07,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 9683 proven. 651 refuted. 0 times theorem prover too weak. 6046 trivial. 0 not checked. [2023-11-26 11:56:09,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 381 proven. 420 refuted. 0 times theorem prover too weak. 15579 trivial. 0 not checked. [2023-11-26 11:56:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892173635] [2023-11-26 11:56:10,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241418245] [2023-11-26 11:56:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241418245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:10,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:10,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-26 11:56:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525722606] [2023-11-26 11:56:10,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:10,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:56:10,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:10,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:56:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:56:10,399 INFO L87 Difference]: Start difference. First operand 429 states and 716 transitions. Second operand has 20 states, 19 states have (on average 8.631578947368421) internal successors, (164), 18 states have internal predecessors, (164), 7 states have call successors, (142), 4 states have call predecessors, (142), 9 states have return successors, (144), 7 states have call predecessors, (144), 7 states have call successors, (144) [2023-11-26 11:56:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:11,867 INFO L93 Difference]: Finished difference Result 893 states and 1461 transitions. [2023-11-26 11:56:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:56:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 8.631578947368421) internal successors, (164), 18 states have internal predecessors, (164), 7 states have call successors, (142), 4 states have call predecessors, (142), 9 states have return successors, (144), 7 states have call predecessors, (144), 7 states have call successors, (144) Word has length 553 [2023-11-26 11:56:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:11,874 INFO L225 Difference]: With dead ends: 893 [2023-11-26 11:56:11,874 INFO L226 Difference]: Without dead ends: 465 [2023-11-26 11:56:11,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:56:11,879 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 624 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:11,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1267 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:56:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-26 11:56:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 453. [2023-11-26 11:56:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 289 states have (on average 1.467128027681661) internal successors, (424), 290 states have internal predecessors, (424), 153 states have call successors, (153), 10 states have call predecessors, (153), 10 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:56:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 730 transitions. [2023-11-26 11:56:11,948 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 730 transitions. Word has length 553 [2023-11-26 11:56:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:11,951 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 730 transitions. [2023-11-26 11:56:11,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 8.631578947368421) internal successors, (164), 18 states have internal predecessors, (164), 7 states have call successors, (142), 4 states have call predecessors, (142), 9 states have return successors, (144), 7 states have call predecessors, (144), 7 states have call successors, (144) [2023-11-26 11:56:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 730 transitions. [2023-11-26 11:56:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:11,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:11,958 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:11,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:12,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:12,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:12,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash 913564051, now seen corresponding path program 1 times [2023-11-26 11:56:12,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:12,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016840135] [2023-11-26 11:56:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:12,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:12,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649928756] [2023-11-26 11:56:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:12,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:12,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:56:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:12,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:56:12,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 5803 proven. 630 refuted. 0 times theorem prover too weak. 9947 trivial. 0 not checked. [2023-11-26 11:56:16,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 162 proven. 639 refuted. 0 times theorem prover too weak. 15579 trivial. 0 not checked. [2023-11-26 11:56:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016840135] [2023-11-26 11:56:19,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649928756] [2023-11-26 11:56:19,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649928756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:19,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:19,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-11-26 11:56:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909025623] [2023-11-26 11:56:19,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:19,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:56:19,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:56:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:56:19,794 INFO L87 Difference]: Start difference. First operand 453 states and 730 transitions. Second operand has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 7 states have call successors, (164), 4 states have call predecessors, (164), 10 states have return successors, (165), 7 states have call predecessors, (165), 7 states have call successors, (165) [2023-11-26 11:56:24,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 11:56:27,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 11:56:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:39,521 INFO L93 Difference]: Finished difference Result 1457 states and 2231 transitions. [2023-11-26 11:56:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-26 11:56:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 7 states have call successors, (164), 4 states have call predecessors, (164), 10 states have return successors, (165), 7 states have call predecessors, (165), 7 states have call successors, (165) Word has length 553 [2023-11-26 11:56:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:39,533 INFO L225 Difference]: With dead ends: 1457 [2023-11-26 11:56:39,533 INFO L226 Difference]: Without dead ends: 1005 [2023-11-26 11:56:39,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2023-11-26 11:56:39,538 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1586 mSDsluCounter, 2909 mSDsCounter, 0 mSdLazyCounter, 3420 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 3285 SdHoareTripleChecker+Invalid, 4305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 3420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:39,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 3285 Invalid, 4305 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [885 Valid, 3420 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2023-11-26 11:56:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2023-11-26 11:56:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 595. [2023-11-26 11:56:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 389 states have (on average 1.4087403598971722) internal successors, (548), 392 states have internal predecessors, (548), 185 states have call successors, (185), 20 states have call predecessors, (185), 20 states have return successors, (185), 182 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-26 11:56:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 918 transitions. [2023-11-26 11:56:39,666 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 918 transitions. Word has length 553 [2023-11-26 11:56:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:39,667 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 918 transitions. [2023-11-26 11:56:39,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 7 states have call successors, (164), 4 states have call predecessors, (164), 10 states have return successors, (165), 7 states have call predecessors, (165), 7 states have call successors, (165) [2023-11-26 11:56:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 918 transitions. [2023-11-26 11:56:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:39,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:39,674 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:39,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:39,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:39,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:39,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash 326758037, now seen corresponding path program 1 times [2023-11-26 11:56:39,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:39,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835710347] [2023-11-26 11:56:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:39,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:39,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558074320] [2023-11-26 11:56:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:39,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:40,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:56:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:40,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:56:40,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 4620 proven. 225 refuted. 0 times theorem prover too weak. 11535 trivial. 0 not checked. [2023-11-26 11:56:42,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835710347] [2023-11-26 11:56:43,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558074320] [2023-11-26 11:56:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558074320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:43,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:43,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-26 11:56:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148077061] [2023-11-26 11:56:43,853 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:43,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:56:43,856 INFO L87 Difference]: Start difference. First operand 595 states and 918 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (91), 2 states have call predecessors, (91), 3 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 11:56:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:45,662 INFO L93 Difference]: Finished difference Result 2010 states and 3180 transitions. [2023-11-26 11:56:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:56:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (91), 2 states have call predecessors, (91), 3 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 553 [2023-11-26 11:56:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:45,675 INFO L225 Difference]: With dead ends: 2010 [2023-11-26 11:56:45,676 INFO L226 Difference]: Without dead ends: 1416 [2023-11-26 11:56:45,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:56:45,680 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 1243 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:45,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 2261 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:56:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2023-11-26 11:56:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 905. [2023-11-26 11:56:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.4448160535117056) internal successors, (864), 601 states have internal predecessors, (864), 276 states have call successors, (276), 30 states have call predecessors, (276), 30 states have return successors, (276), 273 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-26 11:56:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1416 transitions. [2023-11-26 11:56:45,854 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1416 transitions. Word has length 553 [2023-11-26 11:56:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:45,856 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1416 transitions. [2023-11-26 11:56:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (91), 2 states have call predecessors, (91), 3 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 11:56:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1416 transitions. [2023-11-26 11:56:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-26 11:56:45,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:45,862 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:45,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:46,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:56:46,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:46,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash -97553199, now seen corresponding path program 1 times [2023-11-26 11:56:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:46,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719417999] [2023-11-26 11:56:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:46,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:46,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424871052] [2023-11-26 11:56:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:46,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:46,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca27e1c8-0ea4-4949-84cc-c71bc2cb41a3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:56:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:56:46,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:56:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat