./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/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_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/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_4294be78-594d-4b51-994c-a3d098811604/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 bbb30f5a716e95823cb1372888b0a3f5fc4a46205d14c7acf98f1ada42093098 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:45:23,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:45:23,516 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:45:23,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:45:23,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:45:23,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:45:23,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:45:23,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:45:23,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:45:23,585 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:45:23,585 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:45:23,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:45:23,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:45:23,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:45:23,590 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:45:23,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:45:23,591 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:45:23,592 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:45:23,592 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:45:23,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:45:23,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:45:23,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:45:23,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:45:23,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:45:23,595 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:45:23,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:45:23,596 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:45:23,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:45:23,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:45:23,598 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:45:23,599 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:45:23,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:23,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:45:23,600 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:45:23,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:45:23,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:45:23,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:45:23,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:45:23,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:45:23,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:45:23,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:45:23,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:45:23,603 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_4294be78-594d-4b51-994c-a3d098811604/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb30f5a716e95823cb1372888b0a3f5fc4a46205d14c7acf98f1ada42093098 [2023-11-26 11:45:23,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:45:23,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:45:23,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:45:23,997 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:45:23,998 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:45:23,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i [2023-11-26 11:45:27,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:45:27,487 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:45:27,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i [2023-11-26 11:45:27,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/data/7a97f7019/428c99ee0c5b45228c4c131d1ad6de4d/FLAGc1355f9ca [2023-11-26 11:45:27,529 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/data/7a97f7019/428c99ee0c5b45228c4c131d1ad6de4d [2023-11-26 11:45:27,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:45:27,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:45:27,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:27,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:45:27,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:45:27,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:27,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c14d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27, skipping insertion in model container [2023-11-26 11:45:27,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:27,611 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:45:27,784 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_4294be78-594d-4b51-994c-a3d098811604/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i[919,932] [2023-11-26 11:45:27,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:27,890 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:45:27,902 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_4294be78-594d-4b51-994c-a3d098811604/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i[919,932] [2023-11-26 11:45:27,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:27,972 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:45:27,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27 WrapperNode [2023-11-26 11:45:27,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:27,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:27,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:45:27,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:45:27,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:27,998 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,052 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 192 [2023-11-26 11:45:28,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:28,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:45:28,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:45:28,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:45:28,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,093 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,138 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 11:45:28,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,169 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:45:28,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:45:28,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:45:28,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:45:28,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (1/1) ... [2023-11-26 11:45:28,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:28,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:45:28,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:45:28,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:45:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:45:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:45:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:45:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:45:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:45:28,483 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:45:28,486 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:45:29,078 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:45:29,134 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:45:29,135 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:45:29,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:29 BoogieIcfgContainer [2023-11-26 11:45:29,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:45:29,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:45:29,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:45:29,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:45:29,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:27" (1/3) ... [2023-11-26 11:45:29,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce3cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:29, skipping insertion in model container [2023-11-26 11:45:29,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:27" (2/3) ... [2023-11-26 11:45:29,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce3cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:29, skipping insertion in model container [2023-11-26 11:45:29,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:29" (3/3) ... [2023-11-26 11:45:29,148 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-ci_file-45.i [2023-11-26 11:45:29,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:45:29,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:45:29,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:45:29,238 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;@11d4f35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:45:29,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:45:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 50 states have (on average 1.48) internal successors, (74), 51 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 11:45:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-26 11:45:29,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:29,266 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:29,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:29,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1137202854, now seen corresponding path program 1 times [2023-11-26 11:45:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:29,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660635725] [2023-11-26 11:45:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:29,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660635725] [2023-11-26 11:45:29,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:45:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251495624] [2023-11-26 11:45:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:29,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:29,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:29,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:30,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:45:30,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-11-26 11:45:30,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251495624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979599212] [2023-11-26 11:45:30,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:30,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:45:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:45:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:45:30,190 INFO L87 Difference]: Start difference. First operand has 79 states, 50 states have (on average 1.48) internal successors, (74), 51 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-26 11:45:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:30,252 INFO L93 Difference]: Finished difference Result 155 states and 276 transitions. [2023-11-26 11:45:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:45:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 169 [2023-11-26 11:45:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:30,267 INFO L225 Difference]: With dead ends: 155 [2023-11-26 11:45:30,268 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 11:45:30,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 168 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 11:45:30,278 INFO L413 NwaCegarLoop]: 117 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, 117 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 11:45:30,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 11:45:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-26 11:45:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 11:45:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 120 transitions. [2023-11-26 11:45:30,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 120 transitions. Word has length 169 [2023-11-26 11:45:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:30,346 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 120 transitions. [2023-11-26 11:45:30,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-26 11:45:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 120 transitions. [2023-11-26 11:45:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-26 11:45:30,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:30,372 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:30,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:45:30,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:30,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1039698738, now seen corresponding path program 1 times [2023-11-26 11:45:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348276846] [2023-11-26 11:45:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:30,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:30,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352854227] [2023-11-26 11:45:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:30,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:30,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:30,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:30,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:45:31,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-26 11:45:31,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348276846] [2023-11-26 11:45:31,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352854227] [2023-11-26 11:45:31,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352854227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:31,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:31,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:31,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976191121] [2023-11-26 11:45:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:31,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:31,138 INFO L87 Difference]: Start difference. First operand 77 states and 120 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:31,262 INFO L93 Difference]: Finished difference Result 226 states and 352 transitions. [2023-11-26 11:45:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-26 11:45:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:31,278 INFO L225 Difference]: With dead ends: 226 [2023-11-26 11:45:31,278 INFO L226 Difference]: Without dead ends: 150 [2023-11-26 11:45:31,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 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 11:45:31,286 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 109 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:31,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 248 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-26 11:45:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2023-11-26 11:45:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-26 11:45:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2023-11-26 11:45:31,356 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 169 [2023-11-26 11:45:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:31,358 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2023-11-26 11:45:31,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2023-11-26 11:45:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 11:45:31,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:31,363 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:31,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:31,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:31,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:31,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -465437400, now seen corresponding path program 1 times [2023-11-26 11:45:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:31,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276460706] [2023-11-26 11:45:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:31,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836081694] [2023-11-26 11:45:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:31,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:31,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:45:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:31,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:45:31,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-26 11:45:31,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:31,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276460706] [2023-11-26 11:45:31,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836081694] [2023-11-26 11:45:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836081694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:31,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:31,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531273292] [2023-11-26 11:45:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:31,963 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:32,032 INFO L93 Difference]: Finished difference Result 339 states and 524 transitions. [2023-11-26 11:45:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-26 11:45:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:32,039 INFO L225 Difference]: With dead ends: 339 [2023-11-26 11:45:32,039 INFO L226 Difference]: Without dead ends: 192 [2023-11-26 11:45:32,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 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 11:45:32,045 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:32,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 240 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-26 11:45:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 168. [2023-11-26 11:45:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 113 states have (on average 1.3716814159292035) internal successors, (155), 113 states have internal predecessors, (155), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-26 11:45:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 259 transitions. [2023-11-26 11:45:32,098 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 259 transitions. Word has length 170 [2023-11-26 11:45:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:32,100 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 259 transitions. [2023-11-26 11:45:32,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 259 transitions. [2023-11-26 11:45:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 11:45:32,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:32,107 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:32,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:32,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:32,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash 874100274, now seen corresponding path program 1 times [2023-11-26 11:45:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326271954] [2023-11-26 11:45:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:32,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277571094] [2023-11-26 11:45:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:32,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:32,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:32,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:45:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:32,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:45:32,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 673 proven. 39 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-11-26 11:45:35,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-26 11:45:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326271954] [2023-11-26 11:45:44,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277571094] [2023-11-26 11:45:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277571094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:44,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:44,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 11:45:44,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344329960] [2023-11-26 11:45:44,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:45:44,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:45:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:44,039 INFO L87 Difference]: Start difference. First operand 168 states and 259 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-11-26 11:45:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:45,355 INFO L93 Difference]: Finished difference Result 498 states and 740 transitions. [2023-11-26 11:45:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 11:45:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 170 [2023-11-26 11:45:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:45,362 INFO L225 Difference]: With dead ends: 498 [2023-11-26 11:45:45,362 INFO L226 Difference]: Without dead ends: 331 [2023-11-26 11:45:45,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 11:45:45,365 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 460 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:45,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 425 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:45:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-26 11:45:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 191. [2023-11-26 11:45:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.3484848484848484) internal successors, (178), 132 states have internal predecessors, (178), 52 states have call successors, (52), 6 states have call predecessors, (52), 6 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-26 11:45:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 282 transitions. [2023-11-26 11:45:45,399 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 282 transitions. Word has length 170 [2023-11-26 11:45:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:45,400 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 282 transitions. [2023-11-26 11:45:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-11-26 11:45:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 282 transitions. [2023-11-26 11:45:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 11:45:45,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:45,404 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:45,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:45,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:45,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 64753648, now seen corresponding path program 1 times [2023-11-26 11:45:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236009259] [2023-11-26 11:45:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:45,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:45,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803299757] [2023-11-26 11:45:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:45,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:45,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:45:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:45,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:45,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-26 11:45:47,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:47,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236009259] [2023-11-26 11:45:47,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803299757] [2023-11-26 11:45:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803299757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:47,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:45:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131703027] [2023-11-26 11:45:47,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:47,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:47,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:47,457 INFO L87 Difference]: Start difference. First operand 191 states and 282 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:48,060 INFO L93 Difference]: Finished difference Result 479 states and 710 transitions. [2023-11-26 11:45:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-26 11:45:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:48,063 INFO L225 Difference]: With dead ends: 479 [2023-11-26 11:45:48,063 INFO L226 Difference]: Without dead ends: 289 [2023-11-26 11:45:48,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:45:48,065 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 240 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:48,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 196 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:45:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-26 11:45:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2023-11-26 11:45:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 208 states have (on average 1.375) internal successors, (286), 210 states have internal predecessors, (286), 68 states have call successors, (68), 8 states have call predecessors, (68), 8 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 11:45:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 422 transitions. [2023-11-26 11:45:48,115 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 422 transitions. Word has length 170 [2023-11-26 11:45:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:48,116 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 422 transitions. [2023-11-26 11:45:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 422 transitions. [2023-11-26 11:45:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-26 11:45:48,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:48,119 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:48,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:48,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:48,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:48,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 918516620, now seen corresponding path program 1 times [2023-11-26 11:45:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438780520] [2023-11-26 11:45:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:48,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212758643] [2023-11-26 11:45:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:48,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:48,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:48,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:45:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:48,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:45:48,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-26 11:45:48,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:48,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438780520] [2023-11-26 11:45:48,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212758643] [2023-11-26 11:45:48,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212758643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:48,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:48,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621212338] [2023-11-26 11:45:48,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:48,606 INFO L87 Difference]: Start difference. First operand 285 states and 422 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:48,967 INFO L93 Difference]: Finished difference Result 947 states and 1378 transitions. [2023-11-26 11:45:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 171 [2023-11-26 11:45:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:48,975 INFO L225 Difference]: With dead ends: 947 [2023-11-26 11:45:48,975 INFO L226 Difference]: Without dead ends: 663 [2023-11-26 11:45:48,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:48,977 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 182 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:48,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 365 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:45:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-26 11:45:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 455. [2023-11-26 11:45:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 326 states have (on average 1.343558282208589) internal successors, (438), 332 states have internal predecessors, (438), 112 states have call successors, (112), 16 states have call predecessors, (112), 16 states have return successors, (112), 106 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-26 11:45:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 662 transitions. [2023-11-26 11:45:49,063 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 662 transitions. Word has length 171 [2023-11-26 11:45:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:49,064 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 662 transitions. [2023-11-26 11:45:49,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-26 11:45:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 662 transitions. [2023-11-26 11:45:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-26 11:45:49,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:49,067 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:49,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:49,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:45:49,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:49,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1176682058, now seen corresponding path program 1 times [2023-11-26 11:45:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:49,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83695629] [2023-11-26 11:45:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:49,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:49,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579359398] [2023-11-26 11:45:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:49,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:49,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:49,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:45:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:49,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:49,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 669 proven. 33 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2023-11-26 11:45:49,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-26 11:45:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83695629] [2023-11-26 11:45:49,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579359398] [2023-11-26 11:45:49,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579359398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:49,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:49,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:45:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855995639] [2023-11-26 11:45:49,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:49,864 INFO L87 Difference]: Start difference. First operand 455 states and 662 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-26 11:45:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:50,133 INFO L93 Difference]: Finished difference Result 714 states and 1026 transitions. [2023-11-26 11:45:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:45:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 171 [2023-11-26 11:45:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:50,148 INFO L225 Difference]: With dead ends: 714 [2023-11-26 11:45:50,151 INFO L226 Difference]: Without dead ends: 234 [2023-11-26 11:45:50,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:45:50,158 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 140 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:50,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 191 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:45:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-26 11:45:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2023-11-26 11:45:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.28125) internal successors, (205), 163 states have internal predecessors, (205), 56 states have call successors, (56), 9 states have call predecessors, (56), 9 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 11:45:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 317 transitions. [2023-11-26 11:45:50,205 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 317 transitions. Word has length 171 [2023-11-26 11:45:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:50,209 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 317 transitions. [2023-11-26 11:45:50,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-26 11:45:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 317 transitions. [2023-11-26 11:45:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-26 11:45:50,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:50,216 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:50,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:50,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:45:50,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:50,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1760114457, now seen corresponding path program 1 times [2023-11-26 11:45:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107541] [2023-11-26 11:45:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:50,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:50,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:50,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710536088] [2023-11-26 11:45:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:50,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:50,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:50,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:50,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4294be78-594d-4b51-994c-a3d098811604/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:45:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:50,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 11:45:50,718 INFO L285 TraceCheckSpWp]: Computing forward predicates...