./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/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_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/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_3f102999-c173-46d5-b320-c2a5b8a95f57/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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:27:14,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:27:14,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:27:14,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:27:14,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:27:14,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:27:14,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:27:14,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:27:14,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:27:14,660 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:27:14,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:27:14,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:27:14,662 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:27:14,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:27:14,663 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:27:14,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:27:14,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:27:14,664 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:27:14,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:27:14,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:27:14,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:27:14,667 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:27:14,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:27:14,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:27:14,668 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:27:14,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:27:14,669 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:27:14,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:27:14,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:27:14,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:27:14,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:27:14,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:27:14,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:27:14,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:27:14,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:27:14,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:27:14,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:27:14,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:27:14,672 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:27:14,673 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:27:14,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:27:14,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:27:14,673 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_3f102999-c173-46d5-b320-c2a5b8a95f57/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2023-11-28 20:27:14,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:27:14,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:27:14,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:27:14,909 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:27:14,909 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:27:14,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-11-28 20:27:17,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:27:17,918 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:27:17,918 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-11-28 20:27:17,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/data/2dc35e2ac/1183f6af097a406ba8fe9dc6873ebb61/FLAG13d35dedc [2023-11-28 20:27:17,939 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/data/2dc35e2ac/1183f6af097a406ba8fe9dc6873ebb61 [2023-11-28 20:27:17,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:27:17,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:27:17,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:27:17,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:27:17,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:27:17,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:17" (1/1) ... [2023-11-28 20:27:17,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a89695b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:17, skipping insertion in model container [2023-11-28 20:27:17,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:17" (1/1) ... [2023-11-28 20:27:17,977 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:27:18,136 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_3f102999-c173-46d5-b320-c2a5b8a95f57/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2023-11-28 20:27:18,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:27:18,167 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:27:18,182 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_3f102999-c173-46d5-b320-c2a5b8a95f57/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2023-11-28 20:27:18,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:27:18,210 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:27:18,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18 WrapperNode [2023-11-28 20:27:18,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:27:18,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:27:18,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:27:18,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:27:18,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,253 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-28 20:27:18,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:27:18,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:27:18,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:27:18,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:27:18,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,269 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,284 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-28 20:27:18,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,297 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,301 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:27:18,302 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:27:18,302 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:27:18,302 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:27:18,303 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (1/1) ... [2023-11-28 20:27:18,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:27:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:18,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:27:18,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:27:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:27:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:27:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:27:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:27:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:27:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:27:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:27:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:27:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:27:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:27:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:27:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:27:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:27:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:27:18,452 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:27:18,454 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:27:18,590 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:27:18,615 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:27:18,615 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:27:18,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:27:18 BoogieIcfgContainer [2023-11-28 20:27:18,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:27:18,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:27:18,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:27:18,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:27:18,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:27:17" (1/3) ... [2023-11-28 20:27:18,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8833a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:27:18, skipping insertion in model container [2023-11-28 20:27:18,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:18" (2/3) ... [2023-11-28 20:27:18,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8833a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:27:18, skipping insertion in model container [2023-11-28 20:27:18,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:27:18" (3/3) ... [2023-11-28 20:27:18,626 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2023-11-28 20:27:18,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:27:18,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:27:18,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:27:18,696 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;@4f41d94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:27:18,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:27:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2023-11-28 20:27:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 20:27:18,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:18,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:18,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:18,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:18,715 INFO L85 PathProgramCache]: Analyzing trace with hash 215789761, now seen corresponding path program 1 times [2023-11-28 20:27:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:18,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283452272] [2023-11-28 20:27:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283452272] [2023-11-28 20:27:18,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283452272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:18,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:18,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:27:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411750832] [2023-11-28 20:27:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:18,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:27:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:27:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:27:18,954 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-28 20:27:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:18,986 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2023-11-28 20:27:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:27:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-28 20:27:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:18,997 INFO L225 Difference]: With dead ends: 35 [2023-11-28 20:27:18,998 INFO L226 Difference]: Without dead ends: 17 [2023-11-28 20:27:19,000 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 [2023-11-28 20:27:19,005 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 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 [2023-11-28 20:27:19,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:27:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-28 20:27:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-28 20:27:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2023-11-28 20:27:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-28 20:27:19,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2023-11-28 20:27:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:19,041 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-28 20:27:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-28 20:27:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-28 20:27:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:27:19,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:19,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:27:19,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:19,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 647037981, now seen corresponding path program 1 times [2023-11-28 20:27:19,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175944622] [2023-11-28 20:27:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:19,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175944622] [2023-11-28 20:27:19,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175944622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062477548] [2023-11-28 20:27:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:19,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:19,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:19,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:27:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:19,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:27:19,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:27:19,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:27:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062477548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:19,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:27:19,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-28 20:27:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470336540] [2023-11-28 20:27:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:19,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:27:19,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:27:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:27:19,271 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-28 20:27:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:19,304 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-11-28 20:27:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:27:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-11-28 20:27:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:19,305 INFO L225 Difference]: With dead ends: 33 [2023-11-28 20:27:19,305 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:27:19,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:27:19,308 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:19,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:27:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:27:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-11-28 20:27:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2023-11-28 20:27:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-28 20:27:19,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2023-11-28 20:27:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:19,314 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-28 20:27:19,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-28 20:27:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-28 20:27:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-28 20:27:19,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:19,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:19,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:27:19,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:19,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1752948195, now seen corresponding path program 1 times [2023-11-28 20:27:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751455063] [2023-11-28 20:27:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:27:19,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:19,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751455063] [2023-11-28 20:27:19,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751455063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:19,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822763791] [2023-11-28 20:27:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:19,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:19,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:19,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:27:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:19,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:27:19,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:27:19,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:27:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822763791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:19,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-28 20:27:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036627502] [2023-11-28 20:27:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:27:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:27:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:27:19,749 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-11-28 20:27:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:19,778 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-28 20:27:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:27:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 17 [2023-11-28 20:27:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:19,779 INFO L225 Difference]: With dead ends: 38 [2023-11-28 20:27:19,779 INFO L226 Difference]: Without dead ends: 22 [2023-11-28 20:27:19,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:27:19,781 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:19,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:27:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-28 20:27:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-28 20:27:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2023-11-28 20:27:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-28 20:27:19,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2023-11-28 20:27:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:19,788 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-28 20:27:19,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-11-28 20:27:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-28 20:27:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-28 20:27:19,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:19,789 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:19,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:27:19,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:19,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:19,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1726744113, now seen corresponding path program 2 times [2023-11-28 20:27:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:19,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105261281] [2023-11-28 20:27:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 20:27:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105261281] [2023-11-28 20:27:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105261281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884707051] [2023-11-28 20:27:20,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:20,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:20,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:27:20,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:27:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:20,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:27:20,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:27:20,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:27:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884707051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:20,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2023-11-28 20:27:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919022783] [2023-11-28 20:27:20,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:27:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:27:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:27:20,312 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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) [2023-11-28 20:27:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:20,507 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-11-28 20:27:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:27:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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 20 [2023-11-28 20:27:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:20,509 INFO L225 Difference]: With dead ends: 54 [2023-11-28 20:27:20,509 INFO L226 Difference]: Without dead ends: 38 [2023-11-28 20:27:20,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:27:20,511 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:20,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:27:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-28 20:27:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-11-28 20:27:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2023-11-28 20:27:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-28 20:27:20,519 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2023-11-28 20:27:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:20,520 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-28 20:27:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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) [2023-11-28 20:27:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-28 20:27:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-28 20:27:20,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:20,521 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:20,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:27:20,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:20,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:20,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1883384405, now seen corresponding path program 3 times [2023-11-28 20:27:20,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:20,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618501916] [2023-11-28 20:27:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:27:21,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618501916] [2023-11-28 20:27:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618501916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571132519] [2023-11-28 20:27:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:27:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:21,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:21,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:27:21,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:27:21,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:21,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:27:21,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-28 20:27:21,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-28 20:27:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571132519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:21,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:21,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 19 [2023-11-28 20:27:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172490395] [2023-11-28 20:27:21,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:27:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:27:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:27:21,240 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-11-28 20:27:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:21,497 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2023-11-28 20:27:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:27:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 32 [2023-11-28 20:27:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:21,499 INFO L225 Difference]: With dead ends: 81 [2023-11-28 20:27:21,499 INFO L226 Difference]: Without dead ends: 59 [2023-11-28 20:27:21,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:27:21,501 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:21,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 102 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:27:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-28 20:27:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-28 20:27:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 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) [2023-11-28 20:27:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2023-11-28 20:27:21,510 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 32 [2023-11-28 20:27:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2023-11-28 20:27:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-11-28 20:27:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2023-11-28 20:27:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-28 20:27:21,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:21,513 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:21,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:27:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:21,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:21,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -468310051, now seen corresponding path program 4 times [2023-11-28 20:27:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:21,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009985290] [2023-11-28 20:27:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-28 20:27:22,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009985290] [2023-11-28 20:27:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009985290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515661020] [2023-11-28 20:27:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:27:22,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:22,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:22,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:27:22,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:27:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:22,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:27:22,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-28 20:27:22,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-28 20:27:22,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515661020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:22,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:22,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-11-28 20:27:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119238400] [2023-11-28 20:27:22,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:27:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:27:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:27:22,562 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2023-11-28 20:27:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:22,903 INFO L93 Difference]: Finished difference Result 154 states and 216 transitions. [2023-11-28 20:27:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 20:27:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 57 [2023-11-28 20:27:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:22,905 INFO L225 Difference]: With dead ends: 154 [2023-11-28 20:27:22,905 INFO L226 Difference]: Without dead ends: 108 [2023-11-28 20:27:22,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:27:22,908 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:22,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 103 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:27:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-28 20:27:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-28 20:27:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 107 states have internal predecessors, (139), 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) [2023-11-28 20:27:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2023-11-28 20:27:22,937 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 57 [2023-11-28 20:27:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:22,938 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2023-11-28 20:27:22,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2023-11-28 20:27:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2023-11-28 20:27:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-28 20:27:22,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:22,940 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:22,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:27:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:23,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:23,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1663214571, now seen corresponding path program 5 times [2023-11-28 20:27:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:23,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931968153] [2023-11-28 20:27:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-11-28 20:27:23,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:23,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931968153] [2023-11-28 20:27:23,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931968153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:23,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564382244] [2023-11-28 20:27:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:27:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:23,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:23,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:27:34,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-28 20:27:34,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:34,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:27:34,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-11-28 20:27:34,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-11-28 20:27:35,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564382244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:35,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:35,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 45 [2023-11-28 20:27:35,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218507917] [2023-11-28 20:27:35,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:35,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-28 20:27:35,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-28 20:27:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:27:35,421 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 45 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 45 states have internal predecessors, (124), 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) [2023-11-28 20:27:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:35,940 INFO L93 Difference]: Finished difference Result 299 states and 425 transitions. [2023-11-28 20:27:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-28 20:27:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 45 states have internal predecessors, (124), 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 106 [2023-11-28 20:27:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:35,943 INFO L225 Difference]: With dead ends: 299 [2023-11-28 20:27:35,943 INFO L226 Difference]: Without dead ends: 205 [2023-11-28 20:27:35,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1185, Invalid=2121, Unknown=0, NotChecked=0, Total=3306 [2023-11-28 20:27:35,946 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 424 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:35,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 125 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:27:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-28 20:27:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-28 20:27:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.3137254901960784) internal successors, (268), 204 states have internal predecessors, (268), 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) [2023-11-28 20:27:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 268 transitions. [2023-11-28 20:27:35,965 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 268 transitions. Word has length 106 [2023-11-28 20:27:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:35,965 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 268 transitions. [2023-11-28 20:27:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 45 states have internal predecessors, (124), 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) [2023-11-28 20:27:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 268 transitions. [2023-11-28 20:27:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 20:27:35,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:35,970 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:35,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:27:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:36,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:36,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2048898461, now seen corresponding path program 6 times [2023-11-28 20:27:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332328283] [2023-11-28 20:27:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:36,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:36,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332328283] [2023-11-28 20:27:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332328283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:36,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919428227] [2023-11-28 20:27:36,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:27:36,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:36,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:36,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:36,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:27:37,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-28 20:27:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:37,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:27:37,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:37,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-28 20:27:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 59 proven. 59 refuted. 0 times theorem prover too weak. 2643 trivial. 0 not checked. [2023-11-28 20:27:37,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:37,956 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 20:27:37,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2023-11-28 20:27:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 88 proven. 30 refuted. 0 times theorem prover too weak. 2643 trivial. 0 not checked. [2023-11-28 20:27:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919428227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:37,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:37,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 24 [2023-11-28 20:27:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382676945] [2023-11-28 20:27:37,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:27:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:27:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:27:37,996 INFO L87 Difference]: Start difference. First operand 205 states and 268 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-11-28 20:27:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:38,344 INFO L93 Difference]: Finished difference Result 583 states and 770 transitions. [2023-11-28 20:27:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 20:27:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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 203 [2023-11-28 20:27:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:38,348 INFO L225 Difference]: With dead ends: 583 [2023-11-28 20:27:38,348 INFO L226 Difference]: Without dead ends: 393 [2023-11-28 20:27:38,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 20:27:38,350 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:38,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:27:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-28 20:27:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 298. [2023-11-28 20:27:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.3164983164983164) internal successors, (391), 297 states have internal predecessors, (391), 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) [2023-11-28 20:27:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 391 transitions. [2023-11-28 20:27:38,379 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 391 transitions. Word has length 203 [2023-11-28 20:27:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 391 transitions. [2023-11-28 20:27:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-11-28 20:27:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 391 transitions. [2023-11-28 20:27:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-28 20:27:38,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:38,384 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 29, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:38,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:27:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:38,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:38,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 354820457, now seen corresponding path program 1 times [2023-11-28 20:27:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226653231] [2023-11-28 20:27:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226653231] [2023-11-28 20:27:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226653231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25111070] [2023-11-28 20:27:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:39,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:39,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:39,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:27:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:39,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:27:39,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:39,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:39,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25111070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:39,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:39,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-28 20:27:39,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417578056] [2023-11-28 20:27:39,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:39,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-28 20:27:39,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-28 20:27:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:27:39,968 INFO L87 Difference]: Start difference. First operand 298 states and 391 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 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) [2023-11-28 20:27:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:40,022 INFO L93 Difference]: Finished difference Result 596 states and 797 transitions. [2023-11-28 20:27:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:27:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 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 204 [2023-11-28 20:27:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:40,024 INFO L225 Difference]: With dead ends: 596 [2023-11-28 20:27:40,024 INFO L226 Difference]: Without dead ends: 314 [2023-11-28 20:27:40,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:27:40,026 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:40,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 146 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:27:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-28 20:27:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2023-11-28 20:27:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.3003194888178913) internal successors, (407), 313 states have internal predecessors, (407), 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) [2023-11-28 20:27:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2023-11-28 20:27:40,046 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 204 [2023-11-28 20:27:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:40,046 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2023-11-28 20:27:40,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 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) [2023-11-28 20:27:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2023-11-28 20:27:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-28 20:27:40,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:40,048 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:40,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:27:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:40,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 12817257, now seen corresponding path program 2 times [2023-11-28 20:27:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889396250] [2023-11-28 20:27:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:41,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889396250] [2023-11-28 20:27:41,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889396250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504016446] [2023-11-28 20:27:41,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:41,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:41,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:41,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:41,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:27:41,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:27:41,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:42,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:27:42,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:42,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504016446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:43,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:43,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-11-28 20:27:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899347926] [2023-11-28 20:27:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-28 20:27:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-28 20:27:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-28 20:27:43,290 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 65 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 64 states have internal predecessors, (81), 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) [2023-11-28 20:27:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:43,377 INFO L93 Difference]: Finished difference Result 628 states and 845 transitions. [2023-11-28 20:27:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-28 20:27:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 64 states have internal predecessors, (81), 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 220 [2023-11-28 20:27:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:43,380 INFO L225 Difference]: With dead ends: 628 [2023-11-28 20:27:43,381 INFO L226 Difference]: Without dead ends: 346 [2023-11-28 20:27:43,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-28 20:27:43,383 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:43,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:27:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-28 20:27:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-11-28 20:27:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.272463768115942) internal successors, (439), 345 states have internal predecessors, (439), 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) [2023-11-28 20:27:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 439 transitions. [2023-11-28 20:27:43,404 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 439 transitions. Word has length 220 [2023-11-28 20:27:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:43,405 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 439 transitions. [2023-11-28 20:27:43,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 64 states have internal predecessors, (81), 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) [2023-11-28 20:27:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 439 transitions. [2023-11-28 20:27:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-28 20:27:43,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:43,409 INFO L195 NwaCegarLoop]: trace histogram [62, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:43,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:27:43,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:43,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:43,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash 9598825, now seen corresponding path program 3 times [2023-11-28 20:27:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:43,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908950047] [2023-11-28 20:27:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:27:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908950047] [2023-11-28 20:27:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908950047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119668927] [2023-11-28 20:27:47,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:27:47,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:47,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:47,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:27:47,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:27:47,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:47,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:27:47,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:47,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-28 20:27:47,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:27:47,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-28 20:27:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 150 proven. 88 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2023-11-28 20:27:48,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 88 proven. 88 refuted. 0 times theorem prover too weak. 4447 trivial. 0 not checked. [2023-11-28 20:27:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119668927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:48,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 10, 9] total 77 [2023-11-28 20:27:48,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828491677] [2023-11-28 20:27:48,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-28 20:27:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-28 20:27:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2191, Invalid=3661, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 20:27:48,551 INFO L87 Difference]: Start difference. First operand 346 states and 439 transitions. Second operand has 77 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 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) [2023-11-28 20:27:52,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:27:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:58,755 INFO L93 Difference]: Finished difference Result 1016 states and 1292 transitions. [2023-11-28 20:27:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-28 20:27:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 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 252 [2023-11-28 20:27:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:58,760 INFO L225 Difference]: With dead ends: 1016 [2023-11-28 20:27:58,760 INFO L226 Difference]: Without dead ends: 734 [2023-11-28 20:27:58,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 489 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6944, Invalid=15108, Unknown=0, NotChecked=0, Total=22052 [2023-11-28 20:27:58,767 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 256 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:58,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 75 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 5 Unknown, 0 Unchecked, 7.4s Time] [2023-11-28 20:27:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2023-11-28 20:27:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 446. [2023-11-28 20:27:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.2853932584269663) internal successors, (572), 445 states have internal predecessors, (572), 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) [2023-11-28 20:27:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 572 transitions. [2023-11-28 20:27:58,804 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 572 transitions. Word has length 252 [2023-11-28 20:27:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:58,805 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 572 transitions. [2023-11-28 20:27:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 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) [2023-11-28 20:27:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 572 transitions. [2023-11-28 20:27:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-28 20:27:58,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:58,809 INFO L195 NwaCegarLoop]: trace histogram [63, 30, 30, 30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:58,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:27:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:27:59,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:59,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1984663325, now seen corresponding path program 4 times [2023-11-28 20:27:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472614997] [2023-11-28 20:27:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:28:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4686 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-11-28 20:28:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:28:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472614997] [2023-11-28 20:28:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472614997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:28:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126538474] [2023-11-28 20:28:01,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:28:01,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:28:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:28:01,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:28:01,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:28:05,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:28:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:28:05,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:28:05,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:28:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4686 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2023-11-28 20:28:06,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:28:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4686 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2023-11-28 20:28:08,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126538474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:28:08,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:28:08,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 32, 32] total 127 [2023-11-28 20:28:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879219961] [2023-11-28 20:28:08,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:28:08,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-11-28 20:28:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:28:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-11-28 20:28:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2023-11-28 20:28:08,285 INFO L87 Difference]: Start difference. First operand 446 states and 572 transitions. Second operand has 128 states, 128 states have (on average 2.109375) internal successors, (270), 127 states have internal predecessors, (270), 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) [2023-11-28 20:28:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:28:11,675 INFO L93 Difference]: Finished difference Result 1406 states and 1978 transitions. [2023-11-28 20:28:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-28 20:28:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.109375) internal successors, (270), 127 states have internal predecessors, (270), 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 253 [2023-11-28 20:28:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:28:11,682 INFO L225 Difference]: With dead ends: 1406 [2023-11-28 20:28:11,682 INFO L226 Difference]: Without dead ends: 1025 [2023-11-28 20:28:11,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12352, Invalid=24320, Unknown=0, NotChecked=0, Total=36672 [2023-11-28 20:28:11,687 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 896 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:28:11,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 194 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:28:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-11-28 20:28:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 831. [2023-11-28 20:28:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 1.3072289156626506) internal successors, (1085), 830 states have internal predecessors, (1085), 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) [2023-11-28 20:28:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1085 transitions. [2023-11-28 20:28:11,763 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1085 transitions. Word has length 253 [2023-11-28 20:28:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:28:11,764 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1085 transitions. [2023-11-28 20:28:11,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.109375) internal successors, (270), 127 states have internal predecessors, (270), 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) [2023-11-28 20:28:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1085 transitions. [2023-11-28 20:28:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-11-28 20:28:11,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:28:11,768 INFO L195 NwaCegarLoop]: trace histogram [64, 62, 62, 62, 62, 62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:28:11,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:28:11,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:28:11,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:28:11,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:28:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1996450859, now seen corresponding path program 5 times [2023-11-28 20:28:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:28:11,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846387100] [2023-11-28 20:28:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:28:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:28:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:28:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13550 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 11470 trivial. 0 not checked. [2023-11-28 20:28:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:28:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846387100] [2023-11-28 20:28:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846387100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:28:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587095732] [2023-11-28 20:28:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:28:16,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:28:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:28:16,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:28:16,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f102999-c173-46d5-b320-c2a5b8a95f57/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process