./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:05:28,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:05:28,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 12:05:28,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:05:28,914 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:05:28,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:05:28,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:05:28,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:05:28,953 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:05:28,954 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:05:28,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:05:28,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:05:28,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:05:28,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:05:28,957 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:05:28,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:05:28,959 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:05:28,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:05:28,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:05:28,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:05:28,961 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 12:05:28,961 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 12:05:28,962 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 12:05:28,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:05:28,963 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 12:05:28,963 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:05:28,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:05:28,964 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:05:28,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:05:28,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:05:28,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:05:28,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:05:28,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:28,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:05:28,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:05:28,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:05:28,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:05:28,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:05:28,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:05:28,969 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:05:28,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:05:28,969 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_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2023-11-26 12:05:29,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:05:29,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:05:29,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:05:29,361 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:05:29,361 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:05:29,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2023-11-26 12:05:32,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:05:32,781 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:05:32,783 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/sv-benchmarks/c/verifythis/elimination_max_rec.c [2023-11-26 12:05:32,794 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/data/c44d4d944/6b2e5c9f0afe446884f089e492cb3fca/FLAGbde4dbb72 [2023-11-26 12:05:32,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/data/c44d4d944/6b2e5c9f0afe446884f089e492cb3fca [2023-11-26 12:05:32,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:05:32,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:05:32,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:32,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:05:32,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:05:32,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:32" (1/1) ... [2023-11-26 12:05:32,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705cb9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:32, skipping insertion in model container [2023-11-26 12:05:32,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:32" (1/1) ... [2023-11-26 12:05:32,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:05:33,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:33,104 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:05:33,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:33,144 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:05:33,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33 WrapperNode [2023-11-26 12:05:33,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:33,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:33,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:05:33,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:05:33,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,184 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 33 [2023-11-26 12:05:33,184 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:33,185 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:05:33,185 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:05:33,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:05:33,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,204 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,219 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-26 12:05:33,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,229 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,231 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:05:33,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:05:33,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:05:33,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:05:33,237 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (1/1) ... [2023-11-26 12:05:33,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:33,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:05:33,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:05:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:05:33,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:05:33,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:05:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:05:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:05:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-11-26 12:05:33,318 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-11-26 12:05:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:05:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:05:33,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:05:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:05:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:05:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 12:05:33,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 12:05:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:05:33,505 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:05:33,507 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:05:33,810 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:05:33,861 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:05:33,866 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:05:33,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:33 BoogieIcfgContainer [2023-11-26 12:05:33,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:05:33,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:05:33,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:05:33,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:05:33,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:32" (1/3) ... [2023-11-26 12:05:33,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c85686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:33, skipping insertion in model container [2023-11-26 12:05:33,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:33" (2/3) ... [2023-11-26 12:05:33,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c85686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:33, skipping insertion in model container [2023-11-26 12:05:33,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:33" (3/3) ... [2023-11-26 12:05:33,878 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2023-11-26 12:05:33,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:05:33,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-11-26 12:05:33,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:05:33,959 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@11e33c74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:05:33,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-26 12:05:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.68) internal successors, (42), 38 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:05:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 12:05:33,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:33,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:33,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:33,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash -125346991, now seen corresponding path program 1 times [2023-11-26 12:05:33,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:33,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116825808] [2023-11-26 12:05:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:34,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116825808] [2023-11-26 12:05:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116825808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:34,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:34,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:34,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070854695] [2023-11-26 12:05:34,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:05:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:05:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:05:34,270 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.68) internal successors, (42), 38 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:34,328 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-26 12:05:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:05:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-26 12:05:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:34,342 INFO L225 Difference]: With dead ends: 48 [2023-11-26 12:05:34,343 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 12:05:34,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:05:34,350 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:34,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 12:05:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-26 12:05:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.56) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:05:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-26 12:05:34,395 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 14 [2023-11-26 12:05:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:34,395 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-26 12:05:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-26 12:05:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 12:05:34,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:34,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:05:34,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:34,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash 575717587, now seen corresponding path program 1 times [2023-11-26 12:05:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:34,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000304429] [2023-11-26 12:05:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:34,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000304429] [2023-11-26 12:05:34,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000304429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:34,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:34,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:05:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31109903] [2023-11-26 12:05:34,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:34,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:05:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:05:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:34,896 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:35,148 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-11-26 12:05:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:05:35,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-26 12:05:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:35,157 INFO L225 Difference]: With dead ends: 88 [2023-11-26 12:05:35,158 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 12:05:35,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:05:35,162 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:35,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 203 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 12:05:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2023-11-26 12:05:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 52 states have internal predecessors, (63), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:05:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2023-11-26 12:05:35,196 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 14 [2023-11-26 12:05:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:35,196 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2023-11-26 12:05:35,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2023-11-26 12:05:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 12:05:35,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:35,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:35,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:05:35,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:35,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 574300274, now seen corresponding path program 1 times [2023-11-26 12:05:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:35,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569463235] [2023-11-26 12:05:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569463235] [2023-11-26 12:05:35,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569463235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:35,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521261210] [2023-11-26 12:05:35,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:35,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:35,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:35,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,344 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-26 12:05:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:35,367 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-11-26 12:05:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 14 [2023-11-26 12:05:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:35,372 INFO L225 Difference]: With dead ends: 67 [2023-11-26 12:05:35,372 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 12:05:35,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,374 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:35,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 12:05:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-26 12:05:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 51 states have internal predecessors, (62), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:05:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-11-26 12:05:35,395 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 14 [2023-11-26 12:05:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:35,395 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-11-26 12:05:35,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-26 12:05:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-11-26 12:05:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 12:05:35,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:35,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:35,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:05:35,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:35,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 623439352, now seen corresponding path program 1 times [2023-11-26 12:05:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:35,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102729099] [2023-11-26 12:05:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:35,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:35,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102729099] [2023-11-26 12:05:35,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102729099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:35,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:35,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530938362] [2023-11-26 12:05:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,521 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-26 12:05:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:35,542 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-11-26 12:05:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 15 [2023-11-26 12:05:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:35,544 INFO L225 Difference]: With dead ends: 66 [2023-11-26 12:05:35,544 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 12:05:35,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,548 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:35,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 12:05:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-26 12:05:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.564102564102564) internal successors, (61), 50 states have internal predecessors, (61), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:05:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2023-11-26 12:05:35,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 15 [2023-11-26 12:05:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:35,561 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2023-11-26 12:05:35,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-26 12:05:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2023-11-26 12:05:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 12:05:35,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:35,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:05:35,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:35,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2146750772, now seen corresponding path program 1 times [2023-11-26 12:05:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370177523] [2023-11-26 12:05:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:35,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370177523] [2023-11-26 12:05:35,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370177523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:35,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79309069] [2023-11-26 12:05:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:05:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:05:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,644 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-26 12:05:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:35,671 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-11-26 12:05:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:05:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 16 [2023-11-26 12:05:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:35,674 INFO L225 Difference]: With dead ends: 65 [2023-11-26 12:05:35,674 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 12:05:35,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:05:35,675 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 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 [2023-11-26 12:05:35,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 12:05:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-26 12:05:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:05:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2023-11-26 12:05:35,685 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 16 [2023-11-26 12:05:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:35,685 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2023-11-26 12:05:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-26 12:05:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2023-11-26 12:05:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 12:05:35,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:35,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:05:35,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:35,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1404046107, now seen corresponding path program 1 times [2023-11-26 12:05:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856670817] [2023-11-26 12:05:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856670817] [2023-11-26 12:05:35,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856670817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:35,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:35,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:05:35,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560272573] [2023-11-26 12:05:35,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:35,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:05:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:05:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:05:35,828 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:35,925 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-11-26 12:05:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:05:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-26 12:05:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:35,928 INFO L225 Difference]: With dead ends: 61 [2023-11-26 12:05:35,928 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 12:05:35,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:35,937 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:35,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 12:05:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-26 12:05:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 45 states have internal predecessors, (52), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:05:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-26 12:05:35,957 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 17 [2023-11-26 12:05:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:35,958 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-26 12:05:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-26 12:05:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 12:05:35,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:35,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:05:35,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:35,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1404046108, now seen corresponding path program 1 times [2023-11-26 12:05:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988242225] [2023-11-26 12:05:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988242225] [2023-11-26 12:05:36,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988242225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:36,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:36,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 12:05:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891598665] [2023-11-26 12:05:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:05:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:05:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:05:36,418 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:36,758 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2023-11-26 12:05:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:05:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-26 12:05:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:36,760 INFO L225 Difference]: With dead ends: 93 [2023-11-26 12:05:36,760 INFO L226 Difference]: Without dead ends: 93 [2023-11-26 12:05:36,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:36,762 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:36,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 172 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-26 12:05:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2023-11-26 12:05:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.36) internal successors, (68), 57 states have internal predecessors, (68), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 12:05:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-11-26 12:05:36,773 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 17 [2023-11-26 12:05:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:36,773 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-11-26 12:05:36,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-11-26 12:05:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 12:05:36,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:36,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 12:05:36,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:36,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2124764539, now seen corresponding path program 1 times [2023-11-26 12:05:36,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:36,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947001362] [2023-11-26 12:05:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:36,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:36,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:36,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947001362] [2023-11-26 12:05:36,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947001362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:36,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:05:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786867326] [2023-11-26 12:05:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:05:36,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:05:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:05:36,886 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-26 12:05:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:36,950 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2023-11-26 12:05:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:05:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) Word has length 17 [2023-11-26 12:05:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:36,952 INFO L225 Difference]: With dead ends: 77 [2023-11-26 12:05:36,952 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 12:05:36,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:05:36,954 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:36,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 12:05:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-26 12:05:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 50 states have internal predecessors, (60), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-26 12:05:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2023-11-26 12:05:36,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 17 [2023-11-26 12:05:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:36,976 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2023-11-26 12:05:36,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-26 12:05:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2023-11-26 12:05:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:05:36,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:36,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:36,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 12:05:36,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:36,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 575756365, now seen corresponding path program 1 times [2023-11-26 12:05:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:36,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995282520] [2023-11-26 12:05:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:37,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:37,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995282520] [2023-11-26 12:05:37,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995282520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:37,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:37,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 12:05:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506391152] [2023-11-26 12:05:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:37,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 12:05:37,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 12:05:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:05:37,321 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:37,645 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2023-11-26 12:05:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:05:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-26 12:05:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:37,647 INFO L225 Difference]: With dead ends: 86 [2023-11-26 12:05:37,647 INFO L226 Difference]: Without dead ends: 86 [2023-11-26 12:05:37,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:05:37,651 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:37,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 180 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-26 12:05:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2023-11-26 12:05:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 50 states have internal predecessors, (57), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-26 12:05:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2023-11-26 12:05:37,665 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 18 [2023-11-26 12:05:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2023-11-26 12:05:37,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2023-11-26 12:05:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:05:37,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:37,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:37,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 12:05:37,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:37,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1870107036, now seen corresponding path program 1 times [2023-11-26 12:05:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091870441] [2023-11-26 12:05:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:37,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091870441] [2023-11-26 12:05:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091870441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819135271] [2023-11-26 12:05:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:37,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:38,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:05:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:38,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 12:05:38,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:38,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819135271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2023-11-26 12:05:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598477696] [2023-11-26 12:05:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:05:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:05:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:38,280 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:38,571 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2023-11-26 12:05:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:05:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-26 12:05:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:38,574 INFO L225 Difference]: With dead ends: 90 [2023-11-26 12:05:38,574 INFO L226 Difference]: Without dead ends: 90 [2023-11-26 12:05:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:05:38,575 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:38,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 145 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-26 12:05:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2023-11-26 12:05:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 53 states have internal predecessors, (60), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-26 12:05:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2023-11-26 12:05:38,586 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 26 [2023-11-26 12:05:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2023-11-26 12:05:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2023-11-26 12:05:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 12:05:38,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:38,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:38,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:05:38,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1962878955, now seen corresponding path program 1 times [2023-11-26 12:05:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276760491] [2023-11-26 12:05:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:39,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-26 12:05:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:39,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:39,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276760491] [2023-11-26 12:05:39,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276760491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:39,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466014221] [2023-11-26 12:05:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:39,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:39,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:39,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:39,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:05:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:39,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 12:05:39,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:39,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 12:05:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:39,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:39,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466014221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:39,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:39,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2023-11-26 12:05:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370489073] [2023-11-26 12:05:39,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 12:05:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 12:05:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:05:39,507 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:40,108 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2023-11-26 12:05:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:05:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-11-26 12:05:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:40,111 INFO L225 Difference]: With dead ends: 146 [2023-11-26 12:05:40,111 INFO L226 Difference]: Without dead ends: 146 [2023-11-26 12:05:40,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:05:40,112 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 114 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:40,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 185 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:05:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-26 12:05:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 97. [2023-11-26 12:05:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 69 states have internal predecessors, (82), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (21), 17 states have call predecessors, (21), 17 states have call successors, (21) [2023-11-26 12:05:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2023-11-26 12:05:40,122 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 29 [2023-11-26 12:05:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:40,123 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2023-11-26 12:05:40,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2023-11-26 12:05:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 12:05:40,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:40,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:40,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:40,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:40,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 719705438, now seen corresponding path program 1 times [2023-11-26 12:05:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:40,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783498144] [2023-11-26 12:05:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:40,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-26 12:05:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783498144] [2023-11-26 12:05:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783498144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124469384] [2023-11-26 12:05:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:40,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:40,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:40,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:05:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:40,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 12:05:40,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:40,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 12:05:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:41,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124469384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:41,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:41,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-26 12:05:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863563300] [2023-11-26 12:05:41,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:41,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:05:41,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:05:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:05:41,513 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand has 25 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 13 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 12:05:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:43,090 INFO L93 Difference]: Finished difference Result 155 states and 188 transitions. [2023-11-26 12:05:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:05:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 13 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 30 [2023-11-26 12:05:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:43,092 INFO L225 Difference]: With dead ends: 155 [2023-11-26 12:05:43,092 INFO L226 Difference]: Without dead ends: 155 [2023-11-26 12:05:43,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 12:05:43,094 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 280 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:43,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 518 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:05:43,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-26 12:05:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2023-11-26 12:05:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.28125) internal successors, (82), 70 states have internal predecessors, (82), 20 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2023-11-26 12:05:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2023-11-26 12:05:43,110 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 30 [2023-11-26 12:05:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:43,115 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2023-11-26 12:05:43,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 13 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 12:05:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2023-11-26 12:05:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 12:05:43,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:43,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:43,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 12:05:43,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:43,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:43,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1693229712, now seen corresponding path program 1 times [2023-11-26 12:05:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:43,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713468321] [2023-11-26 12:05:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:05:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 12:05:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713468321] [2023-11-26 12:05:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713468321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066607148] [2023-11-26 12:05:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:43,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:05:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:43,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:05:43,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:43,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:44,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-26 12:05:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066607148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:44,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:44,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-26 12:05:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919427466] [2023-11-26 12:05:44,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:05:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:05:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:05:44,355 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-26 12:05:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:45,046 INFO L93 Difference]: Finished difference Result 137 states and 177 transitions. [2023-11-26 12:05:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 12:05:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 31 [2023-11-26 12:05:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:45,049 INFO L225 Difference]: With dead ends: 137 [2023-11-26 12:05:45,051 INFO L226 Difference]: Without dead ends: 137 [2023-11-26 12:05:45,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 12:05:45,053 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:45,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 269 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:05:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-26 12:05:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2023-11-26 12:05:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.203125) internal successors, (77), 69 states have internal predecessors, (77), 20 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2023-11-26 12:05:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2023-11-26 12:05:45,068 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 31 [2023-11-26 12:05:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:45,068 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2023-11-26 12:05:45,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-26 12:05:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2023-11-26 12:05:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 12:05:45,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:45,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:45,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 12:05:45,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 12:05:45,282 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:45,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash -950512349, now seen corresponding path program 1 times [2023-11-26 12:05:45,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:45,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498028811] [2023-11-26 12:05:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:45,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:05:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 12:05:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498028811] [2023-11-26 12:05:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498028811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638350740] [2023-11-26 12:05:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:45,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:45,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:05:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:45,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 12:05:45,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:46,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:46,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 12:05:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638350740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:46,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 32 [2023-11-26 12:05:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366209] [2023-11-26 12:05:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 12:05:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 12:05:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 12:05:46,615 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:05:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:48,539 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2023-11-26 12:05:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 12:05:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 32 [2023-11-26 12:05:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:48,541 INFO L225 Difference]: With dead ends: 161 [2023-11-26 12:05:48,541 INFO L226 Difference]: Without dead ends: 161 [2023-11-26 12:05:48,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=587, Invalid=3195, Unknown=0, NotChecked=0, Total=3782 [2023-11-26 12:05:48,544 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 304 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:48,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 402 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 12:05:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-26 12:05:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 115. [2023-11-26 12:05:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 80 states have internal predecessors, (90), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (27), 23 states have call predecessors, (27), 20 states have call successors, (27) [2023-11-26 12:05:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2023-11-26 12:05:48,558 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 32 [2023-11-26 12:05:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:48,558 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2023-11-26 12:05:48,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:05:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2023-11-26 12:05:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 12:05:48,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:48,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:48,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:05:48,767 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 218776271, now seen corresponding path program 1 times [2023-11-26 12:05:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260383845] [2023-11-26 12:05:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:48,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:48,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:48,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:05:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 12:05:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:49,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260383845] [2023-11-26 12:05:49,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260383845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952631317] [2023-11-26 12:05:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:49,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:49,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:49,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:05:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:49,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 12:05:49,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:49,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-26 12:05:49,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-11-26 12:05:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:49,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952631317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:53,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:05:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2023-11-26 12:05:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739454086] [2023-11-26 12:05:53,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:05:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:05:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:05:53,608 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 12:05:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:53,963 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2023-11-26 12:05:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:05:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-11-26 12:05:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:53,965 INFO L225 Difference]: With dead ends: 117 [2023-11-26 12:05:53,966 INFO L226 Difference]: Without dead ends: 111 [2023-11-26 12:05:53,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:05:53,967 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:53,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 183 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-26 12:05:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 59. [2023-11-26 12:05:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-26 12:05:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2023-11-26 12:05:53,972 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 36 [2023-11-26 12:05:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:53,973 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2023-11-26 12:05:53,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 12:05:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2023-11-26 12:05:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-26 12:05:53,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:53,974 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:53,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:54,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:54,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:05:54,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:54,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1684342373, now seen corresponding path program 1 times [2023-11-26 12:05:54,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:54,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896761987] [2023-11-26 12:05:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:05:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-26 12:05:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 12:05:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 12:05:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:05:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:05:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:05:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-26 12:05:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-26 12:05:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896761987] [2023-11-26 12:05:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896761987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225763314] [2023-11-26 12:05:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:55,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:55,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:55,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:55,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:05:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 12:05:55,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 12:05:56,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225763314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:56,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:05:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 36 [2023-11-26 12:05:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597459433] [2023-11-26 12:05:56,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-26 12:05:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-26 12:05:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 12:05:56,729 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-26 12:06:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:02,491 INFO L93 Difference]: Finished difference Result 339 states and 449 transitions. [2023-11-26 12:06:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-26 12:06:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 84 [2023-11-26 12:06:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:02,495 INFO L225 Difference]: With dead ends: 339 [2023-11-26 12:06:02,495 INFO L226 Difference]: Without dead ends: 339 [2023-11-26 12:06:02,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1396, Invalid=10160, Unknown=0, NotChecked=0, Total=11556 [2023-11-26 12:06:02,500 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 565 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:02,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1386 Invalid, 3397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-26 12:06:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-26 12:06:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 165. [2023-11-26 12:06:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 111 states have internal predecessors, (124), 37 states have call successors, (37), 11 states have call predecessors, (37), 18 states have return successors, (56), 42 states have call predecessors, (56), 36 states have call successors, (56) [2023-11-26 12:06:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2023-11-26 12:06:02,518 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 84 [2023-11-26 12:06:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:02,518 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2023-11-26 12:06:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-26 12:06:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2023-11-26 12:06:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-26 12:06:02,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:02,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:02,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:02,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:02,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:06:02,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1540290793, now seen corresponding path program 1 times [2023-11-26 12:06:02,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:02,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581403128] [2023-11-26 12:06:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:02,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:06:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:06:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:02,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-26 12:06:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:02,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 12:06:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:02,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 12:06:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:06:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:06:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:06:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:06:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-26 12:06:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-26 12:06:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581403128] [2023-11-26 12:06:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581403128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984395522] [2023-11-26 12:06:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:03,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:03,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:06:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:03,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 12:06:03,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-26 12:06:03,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984395522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:04,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:04,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17] total 23 [2023-11-26 12:06:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988708375] [2023-11-26 12:06:04,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:04,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:06:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:06:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2023-11-26 12:06:04,286 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 23 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2023-11-26 12:06:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:06,378 INFO L93 Difference]: Finished difference Result 240 states and 314 transitions. [2023-11-26 12:06:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 12:06:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 84 [2023-11-26 12:06:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:06,391 INFO L225 Difference]: With dead ends: 240 [2023-11-26 12:06:06,391 INFO L226 Difference]: Without dead ends: 234 [2023-11-26 12:06:06,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2023-11-26 12:06:06,393 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 219 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:06,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 552 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 12:06:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-26 12:06:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2023-11-26 12:06:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 121 states have internal predecessors, (138), 39 states have call successors, (39), 12 states have call predecessors, (39), 21 states have return successors, (58), 51 states have call predecessors, (58), 38 states have call successors, (58) [2023-11-26 12:06:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2023-11-26 12:06:06,408 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 84 [2023-11-26 12:06:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:06,409 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2023-11-26 12:06:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2023-11-26 12:06:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2023-11-26 12:06:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-26 12:06:06,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:06,411 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:06,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:06,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 12:06:06,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2023-11-26 12:06:06,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -560176873, now seen corresponding path program 2 times [2023-11-26 12:06:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922010840] [2023-11-26 12:06:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:06,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:06:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:06:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-26 12:06:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 12:06:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 12:06:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:06:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:06:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:06:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:06:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-26 12:06:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-26 12:06:06,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922010840] [2023-11-26 12:06:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922010840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962518578] [2023-11-26 12:06:06,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:06,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:06,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:06:07,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:07,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:06:07,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:07,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-26 12:06:07,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-11-26 12:06:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 12:06:07,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962518578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:11,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:11,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-26 12:06:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999407458] [2023-11-26 12:06:11,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 12:06:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 12:06:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:06:11,333 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand has 11 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-26 12:06:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:11,474 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2023-11-26 12:06:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:06:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 84 [2023-11-26 12:06:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:11,475 INFO L225 Difference]: With dead ends: 108 [2023-11-26 12:06:11,475 INFO L226 Difference]: Without dead ends: 0 [2023-11-26 12:06:11,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:06:11,476 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:11,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 124 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-26 12:06:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-26 12:06:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-26 12:06:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-26 12:06:11,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2023-11-26 12:06:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:11,478 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 12:06:11,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-26 12:06:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-26 12:06:11,478 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-26 12:06:11,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2023-11-26 12:06:11,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2023-11-26 12:06:11,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-26 12:06:11,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-26 12:06:11,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-11-26 12:06:11,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-26 12:06:11,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-26 12:06:11,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-26 12:06:11,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 12:06:11,693 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:11,695 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 12:06:11,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:06:11 BoogieIcfgContainer [2023-11-26 12:06:11,698 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 12:06:11,698 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 12:06:11,698 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 12:06:11,698 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 12:06:11,699 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:33" (3/4) ... [2023-11-26 12:06:11,700 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 12:06:11,704 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-11-26 12:06:11,704 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2023-11-26 12:06:11,704 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-26 12:06:11,710 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2023-11-26 12:06:11,710 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-26 12:06:11,710 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-26 12:06:11,710 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-26 12:06:11,795 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 12:06:11,795 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 12:06:11,795 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 12:06:11,797 INFO L158 Benchmark]: Toolchain (without parser) took 38970.33ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 140.7MB in the beginning and 85.7MB in the end (delta: 54.9MB). Peak memory consumption was 90.2MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,797 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 121.6MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:06:11,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.85ms. Allocated memory is still 169.9MB. Free memory was 140.7MB in the beginning and 129.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.66ms. Allocated memory is still 169.9MB. Free memory was 129.8MB in the beginning and 128.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,799 INFO L158 Benchmark]: Boogie Preprocessor took 49.98ms. Allocated memory is still 169.9MB. Free memory was 128.1MB in the beginning and 126.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,799 INFO L158 Benchmark]: RCFGBuilder took 632.76ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 129.7MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,799 INFO L158 Benchmark]: TraceAbstraction took 37827.21ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 128.9MB in the beginning and 91.0MB in the end (delta: 37.9MB). Peak memory consumption was 76.2MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,803 INFO L158 Benchmark]: Witness Printer took 97.28ms. Allocated memory is still 205.5MB. Free memory was 91.0MB in the beginning and 85.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 12:06:11,808 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 121.6MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.85ms. Allocated memory is still 169.9MB. Free memory was 140.7MB in the beginning and 129.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.66ms. Allocated memory is still 169.9MB. Free memory was 129.8MB in the beginning and 128.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.98ms. Allocated memory is still 169.9MB. Free memory was 128.1MB in the beginning and 126.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 632.76ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 129.7MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 37827.21ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 128.9MB in the beginning and 91.0MB in the end (delta: 37.9MB). Peak memory consumption was 76.2MB. Max. memory is 16.1GB. * Witness Printer took 97.28ms. Allocated memory is still 205.5MB. Free memory was 91.0MB in the beginning and 85.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 48 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 37.8s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2008 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1999 mSDsluCounter, 4769 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4044 mSDsCounter, 1022 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7446 IncrementalHoareTripleChecker+Invalid, 8468 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1022 mSolverCounterUnsat, 725 mSDtfsCounter, 7446 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1073 GetRequests, 647 SyntacticMatches, 14 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4711 ImplicationChecksByTransitivity, 19.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=185occurred in iteration=17, InterpolantAutomatonStates: 273, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 536 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 1014 NumberOfCodeBlocks, 1014 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1077 ConstructedInterpolants, 55 QuantifiedInterpolants, 5591 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1920 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 561/794 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 - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 12:06:11,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597cc613-c54f-46de-b337-23b0d8f6a3e4/bin/uautomizer-verify-VRDe98Ueme/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 Result: TRUE