./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/alt_test.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/alt_test.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB --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 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:21:06,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:21:06,084 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:21:06,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:21:06,089 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:21:06,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:21:06,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:21:06,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:21:06,122 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:21:06,122 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:21:06,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:21:06,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:21:06,123 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:21:06,123 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:21:06,123 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:21:06,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:21:06,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:21:06,126 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:21:06,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:21:06,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:21:06,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:21:06,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:21:06,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:21:06,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:21:06,128 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 [2024-11-27 20:21:06,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:21:06,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:21:06,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:21:06,444 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:21:06,444 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:21:06,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-regression/alt_test.i [2024-11-27 20:21:09,438 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/data/c235f340d/00fa2d3e2eb445b9a4e540eb82005695/FLAG0f70c8fe2 [2024-11-27 20:21:09,736 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:21:09,737 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/sv-benchmarks/c/ldv-regression/alt_test.i [2024-11-27 20:21:09,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/data/c235f340d/00fa2d3e2eb445b9a4e540eb82005695/FLAG0f70c8fe2 [2024-11-27 20:21:09,766 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/data/c235f340d/00fa2d3e2eb445b9a4e540eb82005695 [2024-11-27 20:21:09,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:21:09,770 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:21:09,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:21:09,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:21:09,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:21:09,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:21:09" (1/1) ... [2024-11-27 20:21:09,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5564cc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:09, skipping insertion in model container [2024-11-27 20:21:09,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:21:09" (1/1) ... [2024-11-27 20:21:09,807 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:21:10,171 WARN L250 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_11622697-624a-466c-91c3-ffd2648204e5/sv-benchmarks/c/ldv-regression/alt_test.i[22285,22298] [2024-11-27 20:21:10,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:21:10,199 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:21:10,259 WARN L250 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_11622697-624a-466c-91c3-ffd2648204e5/sv-benchmarks/c/ldv-regression/alt_test.i[22285,22298] [2024-11-27 20:21:10,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:21:10,300 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:21:10,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10 WrapperNode [2024-11-27 20:21:10,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:21:10,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:21:10,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:21:10,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:21:10,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,356 INFO L138 Inliner]: procedures = 121, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 35 [2024-11-27 20:21:10,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:21:10,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:21:10,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:21:10,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:21:10,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,389 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 20:21:10,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,396 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:21:10,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:21:10,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:21:10,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:21:10,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (1/1) ... [2024-11-27 20:21:10,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:21:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:21:10,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:21:10,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:21:10,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:21:10,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:21:10,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:21:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2024-11-27 20:21:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2024-11-27 20:21:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:21:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:21:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:21:10,617 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:21:10,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:21:10,740 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-11-27 20:21:10,742 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:21:10,754 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:21:10,754 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 20:21:10,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:21:10 BoogieIcfgContainer [2024-11-27 20:21:10,755 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:21:10,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:21:10,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:21:10,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:21:10,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:21:09" (1/3) ... [2024-11-27 20:21:10,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c61283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:21:10, skipping insertion in model container [2024-11-27 20:21:10,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:21:10" (2/3) ... [2024-11-27 20:21:10,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c61283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:21:10, skipping insertion in model container [2024-11-27 20:21:10,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:21:10" (3/3) ... [2024-11-27 20:21:10,769 INFO L128 eAbstractionObserver]: Analyzing ICFG alt_test.i [2024-11-27 20:21:10,785 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:21:10,787 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG alt_test.i that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 20:21:10,849 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:21:10,862 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7cd81a2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:21:10,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:21:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:21:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:21:10,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:10,874 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:10,874 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:10,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1030557677, now seen corresponding path program 1 times [2024-11-27 20:21:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:21:10,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113183039] [2024-11-27 20:21:10,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:21:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:21:11,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:21:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113183039] [2024-11-27 20:21:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113183039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:21:11,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:21:11,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:21:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126736863] [2024-11-27 20:21:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:21:11,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:21:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:21:11,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:21:11,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:21:11,179 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:21:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:21:11,207 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-27 20:21:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:21:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 20:21:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:21:11,217 INFO L225 Difference]: With dead ends: 40 [2024-11-27 20:21:11,217 INFO L226 Difference]: Without dead ends: 22 [2024-11-27 20:21:11,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:21:11,224 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:21:11,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:21:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-27 20:21:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-27 20:21:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:21:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-27 20:21:11,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2024-11-27 20:21:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:21:11,270 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-27 20:21:11,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:21:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-27 20:21:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:21:11,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:11,272 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:11,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:21:11,272 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:11,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1839904303, now seen corresponding path program 1 times [2024-11-27 20:21:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:21:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118247684] [2024-11-27 20:21:11,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:21:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:21:11,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:21:11,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118247684] [2024-11-27 20:21:11,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118247684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:21:11,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:21:11,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:21:11,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821716771] [2024-11-27 20:21:11,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:21:11,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:21:11,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:21:11,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:21:11,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:21:11,335 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:21:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:21:11,347 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-27 20:21:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:21:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 20:21:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:21:11,349 INFO L225 Difference]: With dead ends: 30 [2024-11-27 20:21:11,349 INFO L226 Difference]: Without dead ends: 18 [2024-11-27 20:21:11,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:21:11,350 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:21:11,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:21:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-27 20:21:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-27 20:21:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:21:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-27 20:21:11,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2024-11-27 20:21:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:21:11,355 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-27 20:21:11,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:21:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-27 20:21:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-27 20:21:11,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:11,356 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:11,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:21:11,357 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:11,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1999403131, now seen corresponding path program 1 times [2024-11-27 20:21:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:21:11,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372693806] [2024-11-27 20:21:11,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:21:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:21:11,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:21:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372693806] [2024-11-27 20:21:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372693806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:21:11,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:21:11,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:21:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593832425] [2024-11-27 20:21:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:21:11,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:21:11,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:21:11,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:21:11,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:21:11,595 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:21:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:21:11,676 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2024-11-27 20:21:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:21:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-27 20:21:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:21:11,678 INFO L225 Difference]: With dead ends: 30 [2024-11-27 20:21:11,678 INFO L226 Difference]: Without dead ends: 18 [2024-11-27 20:21:11,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:21:11,681 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:21:11,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:21:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-27 20:21:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-27 20:21:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:21:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2024-11-27 20:21:11,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2024-11-27 20:21:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:21:11,686 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2024-11-27 20:21:11,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:21:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2024-11-27 20:21:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-27 20:21:11,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:11,687 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:11,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:21:11,687 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:11,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1387459588, now seen corresponding path program 1 times [2024-11-27 20:21:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:21:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4533287] [2024-11-27 20:21:11,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:21:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:21:11,710 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:21:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:21:11,773 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:21:11,773 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:21:11,774 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-27 20:21:11,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:21:11,779 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-27 20:21:11,801 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 20:21:11,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 08:21:11 BoogieIcfgContainer [2024-11-27 20:21:11,804 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 20:21:11,805 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 20:21:11,805 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 20:21:11,805 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 20:21:11,806 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:21:10" (3/4) ... [2024-11-27 20:21:11,807 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-27 20:21:11,847 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 10. [2024-11-27 20:21:11,903 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 20:21:11,903 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-27 20:21:11,903 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 20:21:11,904 INFO L158 Benchmark]: Toolchain (without parser) took 2134.42ms. Allocated memory is still 142.6MB. Free memory was 115.5MB in the beginning and 107.0MB in the end (delta: 8.5MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2024-11-27 20:21:11,905 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 71.7MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:21:11,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.01ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 98.7MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:21:11,905 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.45ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:21:11,906 INFO L158 Benchmark]: Boogie Preprocessor took 53.37ms. Allocated memory is still 142.6MB. Free memory was 97.2MB in the beginning and 96.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:21:11,906 INFO L158 Benchmark]: RCFGBuilder took 344.85ms. Allocated memory is still 142.6MB. Free memory was 96.0MB in the beginning and 85.3MB in the end (delta: 10.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:21:11,906 INFO L158 Benchmark]: TraceAbstraction took 1047.07ms. Allocated memory is still 142.6MB. Free memory was 84.6MB in the beginning and 111.2MB in the end (delta: -26.6MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. [2024-11-27 20:21:11,907 INFO L158 Benchmark]: Witness Printer took 98.49ms. Allocated memory is still 142.6MB. Free memory was 111.2MB in the beginning and 107.0MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:21:11,909 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 71.7MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.01ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 98.7MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.45ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.37ms. Allocated memory is still 142.6MB. Free memory was 97.2MB in the beginning and 96.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 344.85ms. Allocated memory is still 142.6MB. Free memory was 96.0MB in the beginning and 85.3MB in the end (delta: 10.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1047.07ms. Allocated memory is still 142.6MB. Free memory was 84.6MB in the beginning and 111.2MB in the end (delta: -26.6MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. * Witness Printer took 98.49ms. Allocated memory is still 142.6MB. Free memory was 111.2MB in the beginning and 107.0MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [globalState=0] [L523] CALL, EXPR l_malloc(sizeof(int)) [L529] void *retVal = malloc(size); [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 VAL [globalState=1, retVal={-1:0}] [L532] return retVal; VAL [\result={-1:0}, globalState=1] [L523] RET, EXPR l_malloc(sizeof(int)) [L523] int *a = (int*) l_malloc(sizeof(int)); [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, \old(ptr)={-1:0}, globalState=1] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, \old(ptr)={-1:0}, globalState=1] [L536] globalState = 0 [L524] RET l_free(a) VAL [a={-1:0}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, \old(ptr)={-1:0}, globalState=0] [L535] (globalState == 1) ? (0) : __blast_assert () [L535] CALL __blast_assert () [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 45 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-27 20:21:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11622697-624a-466c-91c3-ffd2648204e5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE