./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU --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 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:02:07,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:02:07,176 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:02:07,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:02:07,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:02:07,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:02:07,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:02:07,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:02:07,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:02:07,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:02:07,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:02:07,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:02:07,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:02:07,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:02:07,223 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:02:07,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:02:07,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:02:07,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:02:07,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:02:07,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:02:07,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:02:07,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:02:07,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:02:07,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:02:07,233 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:02:07,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:02:07,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:02:07,234 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:02:07,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:02:07,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:02:07,235 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:02:07,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:02:07,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:07,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:02:07,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:02:07,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:02:07,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:02:07,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:02:07,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:02:07,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:02:07,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:02:07,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:02:07,241 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_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2024-10-31 22:02:07,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:02:07,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:02:07,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:02:07,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:02:07,653 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:02:07,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i Unable to find full path for "g++" [2024-10-31 22:02:09,854 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:02:10,219 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:02:10,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2024-10-31 22:02:10,242 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/data/3a5945a6c/4314cbb8a1ab4356b2421278cf1d73aa/FLAG0b7873f53 [2024-10-31 22:02:10,545 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/data/3a5945a6c/4314cbb8a1ab4356b2421278cf1d73aa [2024-10-31 22:02:10,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:02:10,562 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:02:10,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:10,564 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:02:10,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:02:10,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:10" (1/1) ... [2024-10-31 22:02:10,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fd14af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:10, skipping insertion in model container [2024-10-31 22:02:10,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:10" (1/1) ... [2024-10-31 22:02:10,629 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:02:10,906 WARN L251 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_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2024-10-31 22:02:10,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:10,956 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:02:10,973 WARN L251 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_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2024-10-31 22:02:10,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:11,026 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:02:11,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11 WrapperNode [2024-10-31 22:02:11,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:11,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:11,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:02:11,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:02:11,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,091 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-10-31 22:02:11,092 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:11,093 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:02:11,093 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:02:11,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:02:11,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,173 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-10-31 22:02:11,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:02:11,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:02:11,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:02:11,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:02:11,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (1/1) ... [2024-10-31 22:02:11,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:11,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:02:11,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:02:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:02:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:02:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:02:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:02:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:02:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:02:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:02:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:02:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:02:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:02:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:02:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:02:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:02:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:02:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:02:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:02:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:02:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:02:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:02:11,478 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:02:11,484 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:02:11,710 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-31 22:02:11,710 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:02:11,729 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:02:11,730 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:02:11,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:11 BoogieIcfgContainer [2024-10-31 22:02:11,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:02:11,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:02:11,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:02:11,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:02:11,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:02:10" (1/3) ... [2024-10-31 22:02:11,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430366c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:11, skipping insertion in model container [2024-10-31 22:02:11,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:11" (2/3) ... [2024-10-31 22:02:11,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430366c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:11, skipping insertion in model container [2024-10-31 22:02:11,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:11" (3/3) ... [2024-10-31 22:02:11,740 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2024-10-31 22:02:11,758 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:02:11,759 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:02:11,835 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:11,845 INFO L333 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, 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;@34d130ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:11,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:02:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:02:11,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:11,859 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:11,860 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:11,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1460666166, now seen corresponding path program 1 times [2024-10-31 22:02:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868828484] [2024-10-31 22:02:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:12,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:12,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868828484] [2024-10-31 22:02:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868828484] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:12,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494754926] [2024-10-31 22:02:12,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:12,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:12,282 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:12,337 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2024-10-31 22:02:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:02:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:12,360 INFO L225 Difference]: With dead ends: 54 [2024-10-31 22:02:12,360 INFO L226 Difference]: Without dead ends: 26 [2024-10-31 22:02:12,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:12,370 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:12,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:02:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-31 22:02:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-10-31 22:02:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-31 22:02:12,420 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2024-10-31 22:02:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:12,421 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-31 22:02:12,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-31 22:02:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:02:12,423 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:12,423 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:12,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:02:12,424 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:12,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1451772201, now seen corresponding path program 1 times [2024-10-31 22:02:12,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:12,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481444639] [2024-10-31 22:02:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481444639] [2024-10-31 22:02:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481444639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:12,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994006619] [2024-10-31 22:02:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:12,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:12,554 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:12,584 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-10-31 22:02:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-31 22:02:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:12,585 INFO L225 Difference]: With dead ends: 44 [2024-10-31 22:02:12,586 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 22:02:12,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:12,588 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:12,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:02:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 22:02:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-10-31 22:02:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-10-31 22:02:12,600 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2024-10-31 22:02:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:12,600 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-10-31 22:02:12,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-10-31 22:02:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:02:12,602 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:12,603 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:12,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:02:12,604 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:12,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1601853018, now seen corresponding path program 1 times [2024-10-31 22:02:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957390090] [2024-10-31 22:02:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:12,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:12,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957390090] [2024-10-31 22:02:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957390090] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004340595] [2024-10-31 22:02:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:12,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:12,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:12,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:02:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:12,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:02:12,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:12,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004340595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:12,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:12,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:02:12,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227759717] [2024-10-31 22:02:12,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:12,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:02:13,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:02:13,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:02:13,002 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:13,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:13,048 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-10-31 22:02:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:02:13,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:02:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:13,049 INFO L225 Difference]: With dead ends: 53 [2024-10-31 22:02:13,049 INFO L226 Difference]: Without dead ends: 32 [2024-10-31 22:02:13,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:02:13,051 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:13,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:02:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-31 22:02:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-31 22:02:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-10-31 22:02:13,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2024-10-31 22:02:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:13,059 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-10-31 22:02:13,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-10-31 22:02:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:02:13,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:13,061 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:13,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:02:13,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:13,262 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:13,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash 729568044, now seen corresponding path program 2 times [2024-10-31 22:02:13,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:13,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156669542] [2024-10-31 22:02:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:13,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:13,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:13,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156669542] [2024-10-31 22:02:13,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156669542] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:13,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243316233] [2024-10-31 22:02:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:02:13,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:13,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:13,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:02:13,563 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:02:13,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:13,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:02:13,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:13,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243316233] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:13,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-10-31 22:02:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088797574] [2024-10-31 22:02:13,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:13,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:02:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:02:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:02:13,758 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:14,019 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2024-10-31 22:02:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:02:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-31 22:02:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:14,021 INFO L225 Difference]: With dead ends: 70 [2024-10-31 22:02:14,022 INFO L226 Difference]: Without dead ends: 49 [2024-10-31 22:02:14,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:02:14,024 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:14,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 142 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-31 22:02:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-10-31 22:02:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-10-31 22:02:14,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 22 [2024-10-31 22:02:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:14,035 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-10-31 22:02:14,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-10-31 22:02:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:02:14,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:14,036 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:14,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:02:14,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:14,241 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:14,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash -945568841, now seen corresponding path program 3 times [2024-10-31 22:02:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:14,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102743196] [2024-10-31 22:02:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:14,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102743196] [2024-10-31 22:02:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102743196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52650924] [2024-10-31 22:02:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:02:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:14,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:14,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:02:14,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:02:14,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:14,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:02:14,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-31 22:02:14,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-31 22:02:15,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52650924] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:15,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:15,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-10-31 22:02:15,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32136391] [2024-10-31 22:02:15,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:15,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:02:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:02:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:02:15,131 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:15,458 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-10-31 22:02:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:02:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-31 22:02:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:15,464 INFO L225 Difference]: With dead ends: 86 [2024-10-31 22:02:15,464 INFO L226 Difference]: Without dead ends: 62 [2024-10-31 22:02:15,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2024-10-31 22:02:15,470 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:15,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-31 22:02:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-10-31 22:02:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2024-10-31 22:02:15,487 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 37 [2024-10-31 22:02:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:15,488 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2024-10-31 22:02:15,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2024-10-31 22:02:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:02:15,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:15,490 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:15,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:02:15,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:15,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:15,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1480520629, now seen corresponding path program 4 times [2024-10-31 22:02:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894598724] [2024-10-31 22:02:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894598724] [2024-10-31 22:02:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894598724] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556528395] [2024-10-31 22:02:16,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:02:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:16,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:16,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:02:16,307 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:02:16,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:16,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:02:16,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:16,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556528395] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:16,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-10-31 22:02:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498311150] [2024-10-31 22:02:16,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:16,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-31 22:02:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-31 22:02:16,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:02:16,809 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:16,949 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2024-10-31 22:02:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 22:02:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-31 22:02:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:16,950 INFO L225 Difference]: With dead ends: 123 [2024-10-31 22:02:16,951 INFO L226 Difference]: Without dead ends: 87 [2024-10-31 22:02:16,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:02:16,954 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:16,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-31 22:02:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-10-31 22:02:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 83 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2024-10-31 22:02:16,967 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 51 [2024-10-31 22:02:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:16,967 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2024-10-31 22:02:16,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2024-10-31 22:02:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 22:02:16,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:16,970 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:16,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:02:17,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:17,174 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:17,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 586712923, now seen corresponding path program 5 times [2024-10-31 22:02:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:17,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779896390] [2024-10-31 22:02:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:17,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779896390] [2024-10-31 22:02:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779896390] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663340315] [2024-10-31 22:02:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:02:18,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:18,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:18,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:02:32,133 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-10-31 22:02:32,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:32,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:02:32,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:32,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:33,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663340315] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:33,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:33,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-10-31 22:02:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112394205] [2024-10-31 22:02:33,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:33,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-31 22:02:33,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-31 22:02:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-31 22:02:33,410 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:33,664 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2024-10-31 22:02:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-31 22:02:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-10-31 22:02:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:33,670 INFO L225 Difference]: With dead ends: 175 [2024-10-31 22:02:33,670 INFO L226 Difference]: Without dead ends: 139 [2024-10-31 22:02:33,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-31 22:02:33,676 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:33,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:02:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-31 22:02:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-10-31 22:02:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.0740740740740742) internal successors, (145), 135 states have internal predecessors, (145), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2024-10-31 22:02:33,706 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 77 [2024-10-31 22:02:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:33,706 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2024-10-31 22:02:33,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2024-10-31 22:02:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-31 22:02:33,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:33,710 INFO L215 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:33,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:02:33,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:33,914 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:33,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1747557337, now seen corresponding path program 6 times [2024-10-31 22:02:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:33,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066396720] [2024-10-31 22:02:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:33,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:02:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066396720] [2024-10-31 22:02:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066396720] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345573598] [2024-10-31 22:02:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:02:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:37,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:02:38,186 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-10-31 22:02:38,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:38,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:02:38,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 99 proven. 51 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2024-10-31 22:02:38,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2024-10-31 22:02:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345573598] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:39,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 11, 11] total 71 [2024-10-31 22:02:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136989459] [2024-10-31 22:02:39,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:39,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-31 22:02:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-31 22:02:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=3313, Unknown=0, NotChecked=0, Total=4970 [2024-10-31 22:02:39,563 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:41,639 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2024-10-31 22:02:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-31 22:02:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-10-31 22:02:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:41,645 INFO L225 Difference]: With dead ends: 203 [2024-10-31 22:02:41,645 INFO L226 Difference]: Without dead ends: 167 [2024-10-31 22:02:41,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5278, Invalid=9484, Unknown=0, NotChecked=0, Total=14762 [2024-10-31 22:02:41,658 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:41,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 139 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:02:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-31 22:02:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2024-10-31 22:02:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.1104294478527608) internal successors, (181), 163 states have internal predecessors, (181), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 185 transitions. [2024-10-31 22:02:41,683 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 185 transitions. Word has length 129 [2024-10-31 22:02:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:41,684 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 185 transitions. [2024-10-31 22:02:41,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 185 transitions. [2024-10-31 22:02:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-10-31 22:02:41,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:41,688 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:41,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:02:41,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_847d3cc0-11f5-4173-ae8d-9f0bea7e7bea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:41,889 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:41,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1427312477, now seen corresponding path program 7 times [2024-10-31 22:02:41,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:41,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530661304] [2024-10-31 22:02:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:41,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat