./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya --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 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:26:38,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:26:38,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:26:38,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:26:38,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:26:38,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:26:38,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:26:38,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:26:38,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:26:38,629 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:26:38,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:26:38,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:26:38,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:26:38,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:26:38,632 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:26:38,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:26:38,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:26:38,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:26:38,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:26:38,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:26:38,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:26:38,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:26:38,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:26:38,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:26:38,637 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:26:38,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:26:38,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:26:38,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:26:38,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:26:38,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:26:38,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:26:38,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:26:38,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:26:38,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:26:38,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:26:38,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:26:38,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:26:38,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:26:38,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:26:38,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:26:38,641 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:26:38,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:26:38,642 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_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 [2023-11-29 06:26:38,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:26:38,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:26:38,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:26:38,959 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:26:38,959 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:26:38,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-11-29 06:26:41,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:26:41,812 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:26:41,812 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-11-29 06:26:41,819 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/data/6ef3110e0/94e1d11986fc4b0aa8211c4f45eab3c0/FLAG81baaa6ee [2023-11-29 06:26:41,832 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/data/6ef3110e0/94e1d11986fc4b0aa8211c4f45eab3c0 [2023-11-29 06:26:41,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:26:41,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:26:41,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:26:41,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:26:41,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:26:41,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:41" (1/1) ... [2023-11-29 06:26:41,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb0a72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:41, skipping insertion in model container [2023-11-29 06:26:41,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:41" (1/1) ... [2023-11-29 06:26:41,869 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:26:42,022 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-11-29 06:26:42,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:26:42,044 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:26:42,057 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-11-29 06:26:42,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:26:42,084 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:26:42,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42 WrapperNode [2023-11-29 06:26:42,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:26:42,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:26:42,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:26:42,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:26:42,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,110 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-11-29 06:26:42,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:26:42,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:26:42,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:26:42,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:26:42,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,132 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 06:26:42,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,144 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:26:42,145 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:26:42,145 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:26:42,145 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:26:42,146 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (1/1) ... [2023-11-29 06:26:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:26:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:42,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:26:42,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:26:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:26:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:26:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:26:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:26:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:26:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:26:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:26:42,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:26:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:26:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:26:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:26:42,278 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:26:42,279 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:26:42,429 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:26:42,456 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:26:42,456 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:26:42,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:42 BoogieIcfgContainer [2023-11-29 06:26:42,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:26:42,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:26:42,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:26:42,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:26:42,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:26:41" (1/3) ... [2023-11-29 06:26:42,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719ae12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:42, skipping insertion in model container [2023-11-29 06:26:42,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:42" (2/3) ... [2023-11-29 06:26:42,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719ae12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:42, skipping insertion in model container [2023-11-29 06:26:42,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:42" (3/3) ... [2023-11-29 06:26:42,465 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2023-11-29 06:26:42,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:26:42,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:26:42,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:26:42,522 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62ef46a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:26:42,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:26:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:26:42,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:42,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:42,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:42,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1193255132, now seen corresponding path program 1 times [2023-11-29 06:26:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:42,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303967187] [2023-11-29 06:26:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303967187] [2023-11-29 06:26:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303967187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:42,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:26:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687518925] [2023-11-29 06:26:42,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:42,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:26:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:26:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:26:42,758 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:42,787 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-11-29 06:26:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:26:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 06:26:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:42,797 INFO L225 Difference]: With dead ends: 27 [2023-11-29 06:26:42,797 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 06:26:42,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:26:42,802 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 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 [2023-11-29 06:26:42,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 06:26:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 06:26:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-29 06:26:42,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2023-11-29 06:26:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:42,831 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-29 06:26:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-29 06:26:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 06:26:42,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:42,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:42,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:26:42,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:42,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -179432299, now seen corresponding path program 1 times [2023-11-29 06:26:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:42,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486131370] [2023-11-29 06:26:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486131370] [2023-11-29 06:26:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486131370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283832045] [2023-11-29 06:26:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:42,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:42,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:42,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:26:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:43,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:26:43,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283832045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:43,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:26:43,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 06:26:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947819420] [2023-11-29 06:26:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:26:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:26:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:43,029 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:43,050 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-11-29 06:26:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:26:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 06:26:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:43,051 INFO L225 Difference]: With dead ends: 22 [2023-11-29 06:26:43,052 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 06:26:43,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:43,054 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:43,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 06:26:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-29 06:26:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-29 06:26:43,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2023-11-29 06:26:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:43,059 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-29 06:26:43,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-29 06:26:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 06:26:43,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:43,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:43,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:43,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:43,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2081164720, now seen corresponding path program 1 times [2023-11-29 06:26:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441155653] [2023-11-29 06:26:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441155653] [2023-11-29 06:26:43,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441155653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034570065] [2023-11-29 06:26:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:43,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:43,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:43,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:43,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:26:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:43,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:26:43,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034570065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:43,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 06:26:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865401039] [2023-11-29 06:26:43,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:26:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:26:43,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:26:43,455 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:43,474 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-29 06:26:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:26:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 06:26:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:43,476 INFO L225 Difference]: With dead ends: 28 [2023-11-29 06:26:43,476 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 06:26:43,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:26:43,478 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:43,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 06:26:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 06:26:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-29 06:26:43,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2023-11-29 06:26:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:43,484 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-29 06:26:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-29 06:26:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 06:26:43,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:43,485 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:43,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:26:43,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:43,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:43,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1331881940, now seen corresponding path program 2 times [2023-11-29 06:26:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:43,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105450396] [2023-11-29 06:26:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:26:43,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:43,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105450396] [2023-11-29 06:26:43,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105450396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:43,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650725231] [2023-11-29 06:26:43,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:26:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:43,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:43,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:26:43,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:26:43,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:43,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:26:43,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650725231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:43,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-29 06:26:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752759792] [2023-11-29 06:26:43,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:26:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:26:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:26:43,982 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:44,026 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2023-11-29 06:26:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:26:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 06:26:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:44,028 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:26:44,028 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 06:26:44,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:26:44,030 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:44,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 06:26:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-29 06:26:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-29 06:26:44,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2023-11-29 06:26:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:44,036 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-29 06:26:44,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-29 06:26:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:26:44,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:44,038 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:44,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:44,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:44,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1104016071, now seen corresponding path program 3 times [2023-11-29 06:26:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:44,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269790898] [2023-11-29 06:26:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:26:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269790898] [2023-11-29 06:26:44,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269790898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:44,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876439435] [2023-11-29 06:26:44,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:26:44,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:44,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:44,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:26:44,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:26:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:44,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:26:44,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:26:44,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:26:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876439435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:44,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 19 [2023-11-29 06:26:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854050372] [2023-11-29 06:26:44,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:26:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:26:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:26:44,723 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:44,785 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-29 06:26:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:26:44,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 06:26:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:44,787 INFO L225 Difference]: With dead ends: 53 [2023-11-29 06:26:44,787 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 06:26:44,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:26:44,788 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:44,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 06:26:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 06:26:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-29 06:26:44,796 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2023-11-29 06:26:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:44,796 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-29 06:26:44,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-29 06:26:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 06:26:44,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:44,798 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:44,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:26:45,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:45,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:45,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1180593803, now seen corresponding path program 4 times [2023-11-29 06:26:45,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:45,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493397376] [2023-11-29 06:26:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:45,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 06:26:45,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:45,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493397376] [2023-11-29 06:26:45,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493397376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:45,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274393209] [2023-11-29 06:26:45,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:26:45,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:45,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:45,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:45,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:26:45,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:26:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:45,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:26:45,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:26:45,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:26:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274393209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:45,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:45,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 28 [2023-11-29 06:26:45,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149650912] [2023-11-29 06:26:45,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:45,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:26:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:26:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:26:45,658 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:45,768 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2023-11-29 06:26:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:26:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 06:26:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:45,769 INFO L225 Difference]: With dead ends: 90 [2023-11-29 06:26:45,769 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 06:26:45,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:26:45,771 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:45,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 80 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:26:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 06:26:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-29 06:26:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-11-29 06:26:45,780 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 37 [2023-11-29 06:26:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:45,781 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-11-29 06:26:45,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-11-29 06:26:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 06:26:45,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:45,783 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:45,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:26:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:26:45,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:45,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -953333895, now seen corresponding path program 5 times [2023-11-29 06:26:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:45,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537157766] [2023-11-29 06:26:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 06:26:46,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537157766] [2023-11-29 06:26:46,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537157766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706983095] [2023-11-29 06:26:46,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:26:46,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:46,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:46,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:46,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:26:46,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-29 06:26:46,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:46,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:26:46,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:26:46,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:26:47,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706983095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:47,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:47,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 45 [2023-11-29 06:26:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691914978] [2023-11-29 06:26:47,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:47,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 06:26:47,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 06:26:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:26:47,325 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:47,505 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2023-11-29 06:26:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 06:26:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-29 06:26:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:47,507 INFO L225 Difference]: With dead ends: 163 [2023-11-29 06:26:47,507 INFO L226 Difference]: Without dead ends: 113 [2023-11-29 06:26:47,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:26:47,510 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:47,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 82 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:26:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-29 06:26:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-29 06:26:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 112 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2023-11-29 06:26:47,521 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 62 [2023-11-29 06:26:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:47,522 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2023-11-29 06:26:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2023-11-29 06:26:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 06:26:47,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:47,526 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:47,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:26:47,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:26:47,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:47,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash -526255243, now seen corresponding path program 6 times [2023-11-29 06:26:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970663111] [2023-11-29 06:26:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970663111] [2023-11-29 06:26:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970663111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288345030] [2023-11-29 06:26:48,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:26:48,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:48,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:48,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:26:48,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-11-29 06:26:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:48,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:26:48,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:48,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288345030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:48,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-11-29 06:26:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982154945] [2023-11-29 06:26:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:26:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:26:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:26:48,950 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:48,993 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2023-11-29 06:26:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:26:48,994 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-29 06:26:48,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:48,995 INFO L225 Difference]: With dead ends: 226 [2023-11-29 06:26:48,995 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 06:26:48,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:26:48,997 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 06:26:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-29 06:26:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.2598425196850394) internal successors, (160), 127 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2023-11-29 06:26:49,010 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 111 [2023-11-29 06:26:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:49,010 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2023-11-29 06:26:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2023-11-29 06:26:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 06:26:49,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:49,013 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:49,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:26:49,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:49,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:49,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1398571911, now seen corresponding path program 7 times [2023-11-29 06:26:49,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:49,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143740363] [2023-11-29 06:26:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:49,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:50,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:50,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143740363] [2023-11-29 06:26:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143740363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637131785] [2023-11-29 06:26:50,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:26:50,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:50,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:50,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:50,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:26:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:50,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:26:50,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:50,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:51,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637131785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:51,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:51,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-11-29 06:26:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271294891] [2023-11-29 06:26:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 06:26:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 06:26:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 06:26:51,433 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:51,502 INFO L93 Difference]: Finished difference Result 256 states and 349 transitions. [2023-11-29 06:26:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 06:26:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2023-11-29 06:26:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:51,503 INFO L225 Difference]: With dead ends: 256 [2023-11-29 06:26:51,504 INFO L226 Difference]: Without dead ends: 158 [2023-11-29 06:26:51,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 06:26:51,507 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:51,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-29 06:26:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-11-29 06:26:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 157 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 190 transitions. [2023-11-29 06:26:51,519 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 190 transitions. Word has length 126 [2023-11-29 06:26:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:51,520 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 190 transitions. [2023-11-29 06:26:51,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 190 transitions. [2023-11-29 06:26:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-29 06:26:51,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:51,523 INFO L195 NwaCegarLoop]: trace histogram [58, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:51,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:26:51,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:51,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:51,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2053387513, now seen corresponding path program 8 times [2023-11-29 06:26:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3653032] [2023-11-29 06:26:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:54,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:54,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3653032] [2023-11-29 06:26:54,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3653032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:54,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629274246] [2023-11-29 06:26:54,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:26:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:54,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:54,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:26:54,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:26:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:54,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 06:26:54,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:54,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:26:58,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629274246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:58,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:58,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 120 [2023-11-29 06:26:58,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465626936] [2023-11-29 06:26:58,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:58,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2023-11-29 06:26:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2023-11-29 06:26:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 06:26:58,252 INFO L87 Difference]: Start difference. First operand 158 states and 190 transitions. Second operand has 121 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 120 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:58,429 INFO L93 Difference]: Finished difference Result 316 states and 439 transitions. [2023-11-29 06:26:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 06:26:58,430 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 120 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-29 06:26:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:58,431 INFO L225 Difference]: With dead ends: 316 [2023-11-29 06:26:58,431 INFO L226 Difference]: Without dead ends: 218 [2023-11-29 06:26:58,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 06:26:58,437 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:58,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:26:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-29 06:26:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-11-29 06:26:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.152073732718894) internal successors, (250), 217 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 250 transitions. [2023-11-29 06:26:58,451 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 250 transitions. Word has length 156 [2023-11-29 06:26:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:58,452 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 250 transitions. [2023-11-29 06:26:58,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 120 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 250 transitions. [2023-11-29 06:26:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-29 06:26:58,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:58,455 INFO L195 NwaCegarLoop]: trace histogram [118, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:58,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:26:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:58,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -261880327, now seen corresponding path program 9 times [2023-11-29 06:26:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:58,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445520949] [2023-11-29 06:26:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8356 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:27:06,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445520949] [2023-11-29 06:27:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445520949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:27:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887964398] [2023-11-29 06:27:06,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:27:06,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:06,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:06,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:34:11,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-11-29 06:34:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:11,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:34:11,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8356 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2023-11-29 06:34:12,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8356 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2023-11-29 06:34:15,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887964398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:15,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 33, 33] total 183 [2023-11-29 06:34:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917447693] [2023-11-29 06:34:15,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:15,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2023-11-29 06:34:15,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2023-11-29 06:34:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9275, Invalid=24031, Unknown=0, NotChecked=0, Total=33306 [2023-11-29 06:34:15,083 INFO L87 Difference]: Start difference. First operand 218 states and 250 transitions. Second operand has 183 states, 183 states have (on average 1.726775956284153) internal successors, (316), 183 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:34:15,634 INFO L93 Difference]: Finished difference Result 413 states and 541 transitions. [2023-11-29 06:34:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2023-11-29 06:34:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.726775956284153) internal successors, (316), 183 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2023-11-29 06:34:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:34:15,637 INFO L225 Difference]: With dead ends: 413 [2023-11-29 06:34:15,637 INFO L226 Difference]: Without dead ends: 315 [2023-11-29 06:34:15,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9275, Invalid=24031, Unknown=0, NotChecked=0, Total=33306 [2023-11-29 06:34:15,640 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 333 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:34:15,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 131 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:34:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-29 06:34:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2023-11-29 06:34:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.2070063694267517) internal successors, (379), 314 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 379 transitions. [2023-11-29 06:34:15,650 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 379 transitions. Word has length 216 [2023-11-29 06:34:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:34:15,651 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 379 transitions. [2023-11-29 06:34:15,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.726775956284153) internal successors, (316), 183 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 379 transitions. [2023-11-29 06:34:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-29 06:34:15,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:34:15,654 INFO L195 NwaCegarLoop]: trace histogram [119, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:15,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:34:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:15,855 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:34:15,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1130739723, now seen corresponding path program 10 times [2023-11-29 06:34:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710289489] [2023-11-29 06:34:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12875 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2023-11-29 06:34:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710289489] [2023-11-29 06:34:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710289489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080231367] [2023-11-29 06:34:24,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:34:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:24,259 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:34:24,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:34:24,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:24,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 06:34:24,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12875 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-29 06:34:28,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12875 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-29 06:34:34,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080231367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:34,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:34,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 65, 65] total 248 [2023-11-29 06:34:34,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458692994] [2023-11-29 06:34:34,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:34,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2023-11-29 06:34:34,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2023-11-29 06:34:34,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15508, Invalid=45748, Unknown=0, NotChecked=0, Total=61256 [2023-11-29 06:34:34,821 INFO L87 Difference]: Start difference. First operand 315 states and 379 transitions. Second operand has 248 states, 248 states have (on average 2.0524193548387095) internal successors, (509), 248 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:34:36,780 INFO L93 Difference]: Finished difference Result 702 states and 958 transitions. [2023-11-29 06:34:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2023-11-29 06:34:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 2.0524193548387095) internal successors, (509), 248 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2023-11-29 06:34:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:34:36,784 INFO L225 Difference]: With dead ends: 702 [2023-11-29 06:34:36,784 INFO L226 Difference]: Without dead ends: 508 [2023-11-29 06:34:36,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14994 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=15508, Invalid=45748, Unknown=0, NotChecked=0, Total=61256 [2023-11-29 06:34:36,787 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 448 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:34:36,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 198 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:34:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-29 06:34:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2023-11-29 06:34:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.2544378698224852) internal successors, (636), 507 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 636 transitions. [2023-11-29 06:34:36,801 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 636 transitions. Word has length 313 [2023-11-29 06:34:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:34:36,801 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 636 transitions. [2023-11-29 06:34:36,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 2.0524193548387095) internal successors, (509), 248 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 636 transitions. [2023-11-29 06:34:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-29 06:34:36,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:34:36,804 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 120, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:36,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:34:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:37,005 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:34:37,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash 802446201, now seen corresponding path program 11 times [2023-11-29 06:34:37,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:37,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560543456] [2023-11-29 06:34:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:37,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31011 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2023-11-29 06:34:47,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:47,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560543456] [2023-11-29 06:34:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560543456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:47,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20282748] [2023-11-29 06:34:47,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:34:47,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:47,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:47,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:47,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba79974-ca95-403a-82c9-d1234facfc83/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process