./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI --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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:28:57,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:28:58,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:28:58,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:28:58,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:28:58,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:28:58,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:28:58,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:28:58,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:28:58,096 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:28:58,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:28:58,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:28:58,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:28:58,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:28:58,100 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:28:58,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:28:58,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:28:58,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:28:58,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:28:58,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:28:58,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:28:58,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:28:58,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:28:58,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:28:58,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:28:58,106 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:28:58,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:28:58,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:28:58,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:28:58,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:28:58,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:28:58,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:28:58,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:28:58,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:28:58,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:28:58,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:28:58,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:28:58,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:28:58,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:28:58,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:28:58,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:28:58,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:28:58,114 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_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2023-11-24 21:28:58,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:28:58,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:28:58,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:28:58,468 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:28:58,468 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:28:58,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-24 21:29:01,694 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:29:01,936 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:29:01,936 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-24 21:29:01,949 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/data/0a4ead0f5/7d454a98f0ba4ee1bc8581e0be4a2559/FLAG6cd4bff34 [2023-11-24 21:29:01,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/data/0a4ead0f5/7d454a98f0ba4ee1bc8581e0be4a2559 [2023-11-24 21:29:01,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:29:01,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:29:01,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:01,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:29:01,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:29:01,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:01" (1/1) ... [2023-11-24 21:29:01,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573fc6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:01, skipping insertion in model container [2023-11-24 21:29:01,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:01" (1/1) ... [2023-11-24 21:29:02,024 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:29:02,203 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_11dc0304-318c-4c6d-9849-9c6b8018e5ee/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-24 21:29:02,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:02,237 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:29:02,251 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_11dc0304-318c-4c6d-9849-9c6b8018e5ee/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-24 21:29:02,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:02,280 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:29:02,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02 WrapperNode [2023-11-24 21:29:02,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:02,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:02,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:29:02,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:29:02,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,325 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 132 [2023-11-24 21:29:02,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:02,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:29:02,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:29:02,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:29:02,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,343 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,359 INFO L175 MemorySlicer]: Split 16 memory accesses to 7 slices as follows [2, 3, 3, 2, 2, 2, 2]. 19 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 1, 1, 1, 1]. [2023-11-24 21:29:02,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:29:02,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:29:02,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:29:02,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:29:02,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (1/1) ... [2023-11-24 21:29:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:29:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:02,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:29:02,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:29:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:29:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:29:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:29:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:29:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:29:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:29:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:29:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:29:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:29:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:29:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:29:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:29:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:29:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:29:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:29:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:29:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:29:02,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:29:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:29:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:29:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:29:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:29:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:29:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:29:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:29:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:29:02,583 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:29:02,586 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:29:02,829 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:29:02,998 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:29:03,002 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-24 21:29:03,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:03 BoogieIcfgContainer [2023-11-24 21:29:03,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:29:03,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:29:03,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:29:03,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:29:03,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:29:01" (1/3) ... [2023-11-24 21:29:03,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf6a624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:03, skipping insertion in model container [2023-11-24 21:29:03,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:02" (2/3) ... [2023-11-24 21:29:03,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf6a624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:03, skipping insertion in model container [2023-11-24 21:29:03,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:03" (3/3) ... [2023-11-24 21:29:03,011 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2023-11-24 21:29:03,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:29:03,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:29:03,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:29:03,088 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;@727741c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:29:03,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:29:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 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) [2023-11-24 21:29:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:29:03,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:03,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:03,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:03,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1196940253, now seen corresponding path program 1 times [2023-11-24 21:29:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:03,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991030342] [2023-11-24 21:29:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:03,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991030342] [2023-11-24 21:29:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991030342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:29:03,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230570227] [2023-11-24 21:29:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:29:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:29:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:29:03,475 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 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) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:03,528 INFO L93 Difference]: Finished difference Result 39 states and 67 transitions. [2023-11-24 21:29:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:29:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:29:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:03,539 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:29:03,539 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 21:29:03,542 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 [2023-11-24 21:29:03,546 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:03,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:29:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 21:29:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-24 21:29:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2023-11-24 21:29:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-11-24 21:29:03,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 16 [2023-11-24 21:29:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:03,592 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-11-24 21:29:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-11-24 21:29:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:29:03,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:03,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:03,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:29:03,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:03,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1757111217, now seen corresponding path program 1 times [2023-11-24 21:29:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:03,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092407459] [2023-11-24 21:29:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:29:03,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:03,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092407459] [2023-11-24 21:29:03,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092407459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:03,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048296261] [2023-11-24 21:29:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:03,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:03,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:03,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:29:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:03,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:29:03,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:29:03,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:29:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048296261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:03,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:29:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-24 21:29:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432739863] [2023-11-24 21:29:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:29:03,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:29:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:29:03,892 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:03,967 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-11-24 21:29:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:29:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:29:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:03,969 INFO L225 Difference]: With dead ends: 38 [2023-11-24 21:29:03,969 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:29:03,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:29:03,972 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:03,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:29:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:29:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-24 21:29:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-24 21:29:03,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2023-11-24 21:29:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:03,986 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-24 21:29:03,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:29:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-24 21:29:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:29:03,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:03,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:04,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:04,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 21:29:04,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:04,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1133761251, now seen corresponding path program 1 times [2023-11-24 21:29:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:04,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633983908] [2023-11-24 21:29:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:04,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:29:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633983908] [2023-11-24 21:29:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633983908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780769100] [2023-11-24 21:29:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:04,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:04,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:04,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:04,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:29:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:04,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:29:04,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:29:04,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:29:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780769100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:04,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 21:29:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3849] [2023-11-24 21:29:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:29:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:29:04,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:29:04,632 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2023-11-24 21:29:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:04,707 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-11-24 21:29:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:29:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) Word has length 22 [2023-11-24 21:29:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:04,713 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:29:04,713 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:29:04,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:29:04,718 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:04,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:29:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:29:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-24 21:29:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2023-11-24 21:29:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-24 21:29:04,725 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-11-24 21:29:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:04,726 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-24 21:29:04,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2023-11-24 21:29:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-24 21:29:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:29:04,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:04,727 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:04,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:04,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:04,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash -718300931, now seen corresponding path program 2 times [2023-11-24 21:29:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099640696] [2023-11-24 21:29:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:29:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099640696] [2023-11-24 21:29:05,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099640696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239483138] [2023-11-24 21:29:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:29:05,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:05,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:05,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:29:05,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:29:05,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:05,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:29:05,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:29:05,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:29:05,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239483138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:05,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:05,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 21:29:05,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731747912] [2023-11-24 21:29:05,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:29:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:29:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:29:05,375 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2023-11-24 21:29:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:05,518 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2023-11-24 21:29:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:29:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 25 [2023-11-24 21:29:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:05,520 INFO L225 Difference]: With dead ends: 60 [2023-11-24 21:29:05,520 INFO L226 Difference]: Without dead ends: 42 [2023-11-24 21:29:05,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:29:05,522 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:05,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:29:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-24 21:29:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-24 21:29:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2023-11-24 21:29:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-24 21:29:05,532 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 25 [2023-11-24 21:29:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:05,532 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-24 21:29:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2023-11-24 21:29:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-24 21:29:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:29:05,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:05,534 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:05,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:29:05,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:05,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:05,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash 431522391, now seen corresponding path program 3 times [2023-11-24 21:29:05,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:05,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556012039] [2023-11-24 21:29:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-24 21:29:06,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556012039] [2023-11-24 21:29:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556012039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142147546] [2023-11-24 21:29:06,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:29:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:06,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:29:06,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:29:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:06,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:29:06,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-24 21:29:06,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-24 21:29:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142147546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:06,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-11-24 21:29:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073059230] [2023-11-24 21:29:06,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:29:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:29:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:29:06,509 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2023-11-24 21:29:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:06,734 INFO L93 Difference]: Finished difference Result 109 states and 151 transitions. [2023-11-24 21:29:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:29:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 40 [2023-11-24 21:29:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:06,736 INFO L225 Difference]: With dead ends: 109 [2023-11-24 21:29:06,736 INFO L226 Difference]: Without dead ends: 73 [2023-11-24 21:29:06,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:29:06,737 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:29:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-24 21:29:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-24 21:29:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 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) [2023-11-24 21:29:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-24 21:29:06,750 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 40 [2023-11-24 21:29:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-24 21:29:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2023-11-24 21:29:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-24 21:29:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-24 21:29:06,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:06,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:06,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:06,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:06,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:06,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2068982577, now seen corresponding path program 4 times [2023-11-24 21:29:06,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127963944] [2023-11-24 21:29:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-24 21:29:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:07,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127963944] [2023-11-24 21:29:07,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127963944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768036006] [2023-11-24 21:29:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:29:07,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:07,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:07,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:29:07,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:29:07,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:29:07,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:29:07,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:29:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-24 21:29:07,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:29:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-24 21:29:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768036006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:29:07,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:29:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-24 21:29:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780526996] [2023-11-24 21:29:07,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:29:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:29:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:29:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:29:07,738 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-11-24 21:29:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:07,801 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2023-11-24 21:29:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:29:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 71 [2023-11-24 21:29:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:07,805 INFO L225 Difference]: With dead ends: 146 [2023-11-24 21:29:07,805 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 21:29:07,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:29:07,809 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:07,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:29:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 21:29:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-24 21:29:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 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) [2023-11-24 21:29:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2023-11-24 21:29:07,827 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2023-11-24 21:29:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:07,828 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2023-11-24 21:29:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-11-24 21:29:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2023-11-24 21:29:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 21:29:07,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:07,829 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:07,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:29:08,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:08,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:29:08,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2136230615, now seen corresponding path program 5 times [2023-11-24 21:29:08,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:08,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211743932] [2023-11-24 21:29:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:08,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-24 21:29:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211743932] [2023-11-24 21:29:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211743932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:29:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138341169] [2023-11-24 21:29:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:29:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:29:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:08,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:29:08,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dc0304-318c-4c6d-9849-9c6b8018e5ee/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process