./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx --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 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:23:00,995 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:23:01,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:23:01,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:23:01,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:23:01,161 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:23:01,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:23:01,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:23:01,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:23:01,168 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:23:01,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:23:01,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:23:01,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:23:01,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:23:01,173 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:23:01,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:23:01,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:23:01,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:23:01,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:23:01,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:23:01,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:23:01,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:23:01,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:23:01,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:23:01,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:23:01,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:23:01,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:23:01,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:23:01,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:23:01,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:23:01,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:23:01,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:01,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:23:01,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:23:01,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:23:01,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:23:01,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:23:01,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:23:01,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:23:01,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:23:01,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:23:01,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:23:01,185 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_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f [2023-11-21 22:23:01,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:23:01,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:23:01,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:23:01,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:23:01,483 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:23:01,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2023-11-21 22:23:04,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:23:05,337 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:23:05,344 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2023-11-21 22:23:05,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/data/86cb5f354/abf291a136a042c69fd4b8dc901e8179/FLAG204aedbb7 [2023-11-21 22:23:05,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/data/86cb5f354/abf291a136a042c69fd4b8dc901e8179 [2023-11-21 22:23:05,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:23:05,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:23:05,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:05,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:23:05,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:23:05,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:05" (1/1) ... [2023-11-21 22:23:05,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dad51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:05, skipping insertion in model container [2023-11-21 22:23:05,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:05" (1/1) ... [2023-11-21 22:23:05,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:23:05,859 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2023-11-21 22:23:05,875 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2023-11-21 22:23:05,879 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2023-11-21 22:23:05,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:05,921 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:23:05,969 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2023-11-21 22:23:05,971 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2023-11-21 22:23:05,972 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_775e618b-ece2-448f-a74b-094989dc57d6/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2023-11-21 22:23:05,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:06,023 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:23:06,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06 WrapperNode [2023-11-21 22:23:06,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:06,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:06,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:23:06,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:23:06,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,082 INFO L138 Inliner]: procedures = 142, calls = 63, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 185 [2023-11-21 22:23:06,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:06,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:23:06,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:23:06,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:23:06,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,101 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,153 INFO L187 HeapSplitter]: Split 28 memory accesses to 2 slices as follows [2, 26] [2023-11-21 22:23:06,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:23:06,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:23:06,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:23:06,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:23:06,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (1/1) ... [2023-11-21 22:23:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:06,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:23:06,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:23:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-21 22:23:06,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-21 22:23:06,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2023-11-21 22:23:06,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2023-11-21 22:23:06,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:23:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:23:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-21 22:23:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-21 22:23:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-21 22:23:06,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-21 22:23:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-21 22:23:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-21 22:23:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:23:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-21 22:23:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-21 22:23:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2023-11-21 22:23:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2023-11-21 22:23:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:23:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:23:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-21 22:23:06,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-21 22:23:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:23:06,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:23:06,448 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:23:06,451 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:23:06,854 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:23:06,982 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:23:06,982 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 22:23:06,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:06 BoogieIcfgContainer [2023-11-21 22:23:06,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:23:06,987 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:23:06,987 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:23:06,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:23:06,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:23:05" (1/3) ... [2023-11-21 22:23:06,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4c6fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:06, skipping insertion in model container [2023-11-21 22:23:06,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:06" (2/3) ... [2023-11-21 22:23:06,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4c6fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:06, skipping insertion in model container [2023-11-21 22:23:06,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:06" (3/3) ... [2023-11-21 22:23:06,993 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-2.i [2023-11-21 22:23:07,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:23:07,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-21 22:23:07,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:23:07,078 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;@5a542574, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:23:07,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-21 22:23:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:23:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:23:07,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:07,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:23:07,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:07,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1716914938, now seen corresponding path program 1 times [2023-11-21 22:23:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851041888] [2023-11-21 22:23:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:07,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851041888] [2023-11-21 22:23:07,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851041888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:07,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:07,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:23:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831784645] [2023-11-21 22:23:07,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:07,543 INFO L87 Difference]: Start difference. First operand has 55 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:07,854 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2023-11-21 22:23:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:23:07,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 22:23:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:07,867 INFO L225 Difference]: With dead ends: 147 [2023-11-21 22:23:07,867 INFO L226 Difference]: Without dead ends: 93 [2023-11-21 22:23:07,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:23:07,875 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:07,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:23:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-21 22:23:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2023-11-21 22:23:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 54 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 22:23:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-21 22:23:07,938 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 6 [2023-11-21 22:23:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:07,938 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-21 22:23:07,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-21 22:23:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:23:07,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:07,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:07,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:23:07,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:07,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1151511040, now seen corresponding path program 1 times [2023-11-21 22:23:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414177519] [2023-11-21 22:23:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:23:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:08,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414177519] [2023-11-21 22:23:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414177519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:08,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:08,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:23:08,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820387697] [2023-11-21 22:23:08,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:08,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:08,134 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:23:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:08,335 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2023-11-21 22:23:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:23:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-21 22:23:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:08,337 INFO L225 Difference]: With dead ends: 129 [2023-11-21 22:23:08,338 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 22:23:08,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:23:08,340 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:08,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:23:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 22:23:08,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-11-21 22:23:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 22:23:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-11-21 22:23:08,354 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2023-11-21 22:23:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:08,355 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-11-21 22:23:08,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:23:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-11-21 22:23:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:23:08,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:08,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:08,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:23:08,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:08,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1493700807, now seen corresponding path program 1 times [2023-11-21 22:23:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:08,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136931589] [2023-11-21 22:23:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:09,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136931589] [2023-11-21 22:23:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136931589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173095082] [2023-11-21 22:23:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:09,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:09,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:23:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-21 22:23:09,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:09,972 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:23:09,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:23:10,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2023-11-21 22:23:10,163 INFO L349 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2023-11-21 22:23:10,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 22:23:10,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 25 [2023-11-21 22:23:10,206 INFO L349 Elim1Store]: treesize reduction 42, result has 35.4 percent of original size [2023-11-21 22:23:10,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2023-11-21 22:23:10,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 22:23:10,285 INFO L349 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2023-11-21 22:23:10,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 22:23:10,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 25 [2023-11-21 22:23:10,301 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-21 22:23:10,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2023-11-21 22:23:10,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 22:23:10,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2023-11-21 22:23:10,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-11-21 22:23:10,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2023-11-21 22:23:10,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 74 [2023-11-21 22:23:10,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-21 22:23:10,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-21 22:23:10,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2023-11-21 22:23:10,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2023-11-21 22:23:11,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-21 22:23:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:11,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:23:11,608 INFO L349 Elim1Store]: treesize reduction 136, result has 36.7 percent of original size [2023-11-21 22:23:11,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 554 treesize of output 361 [2023-11-21 22:23:11,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:23:11,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 251 [2023-11-21 22:23:11,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 134 [2023-11-21 22:23:11,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 130 [2023-11-21 22:23:12,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-21 22:23:12,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-21 22:23:12,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:12,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:12,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:13,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:13,031 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-21 22:23:13,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-21 22:23:13,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:13,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:23:13,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 88 [2023-11-21 22:23:13,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-21 22:23:13,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:23:13,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 85 [2023-11-21 22:23:13,431 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-21 22:23:13,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:23:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:23:13,552 INFO L349 Elim1Store]: treesize reduction 94, result has 1.1 percent of original size [2023-11-21 22:23:13,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2023-11-21 22:23:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173095082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:23:13,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:23:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-21 22:23:13,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11687944] [2023-11-21 22:23:13,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:23:13,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-21 22:23:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-21 22:23:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:23:13,696 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-21 22:23:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:15,488 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2023-11-21 22:23:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:23:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 19 [2023-11-21 22:23:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:15,491 INFO L225 Difference]: With dead ends: 133 [2023-11-21 22:23:15,491 INFO L226 Difference]: Without dead ends: 111 [2023-11-21 22:23:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2023-11-21 22:23:15,494 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 257 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 390 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 22:23:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-21 22:23:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2023-11-21 22:23:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 22:23:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2023-11-21 22:23:15,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 19 [2023-11-21 22:23:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:15,534 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2023-11-21 22:23:15,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-21 22:23:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2023-11-21 22:23:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:23:15,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:15,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:15,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:15,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_775e618b-ece2-448f-a74b-094989dc57d6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:15,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:15,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -868958497, now seen corresponding path program 1 times [2023-11-21 22:23:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:15,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234252246] [2023-11-21 22:23:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:15,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:23:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:23:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:15,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234252246] [2023-11-21 22:23:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234252246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:15,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:23:15,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087631063] [2023-11-21 22:23:15,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:15,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:23:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:23:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:23:15,966 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:23:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:16,215 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2023-11-21 22:23:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:23:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-21 22:23:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:16,219 INFO L225 Difference]: With dead ends: 101 [2023-11-21 22:23:16,219 INFO L226 Difference]: Without dead ends: 99 [2023-11-21 22:23:16,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:16,220 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:16,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:23:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-21 22:23:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-11-21 22:23:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.303030303030303) internal successors, (86), 71 states have internal predecessors, (86), 16 states have call successors, (16), 10 states have call predecessors, (16), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-21 22:23:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2023-11-21 22:23:16,241 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 24 [2023-11-21 22:23:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:16,241 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2023-11-21 22:23:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:23:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2023-11-21 22:23:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 22:23:16,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:16,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:23:16,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:16,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1336215938, now seen corresponding path program 1 times [2023-11-21 22:23:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:16,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331457113] [2023-11-21 22:23:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:17,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat