./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU --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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:03:54,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:03:54,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:03:54,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:03:54,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:03:54,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:03:54,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:03:54,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:03:54,211 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:03:54,211 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:03:54,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:03:54,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:03:54,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:03:54,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:03:54,214 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:03:54,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:03:54,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:03:54,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:03:54,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:03:54,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:03:54,217 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:03:54,220 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:03:54,220 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:03:54,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:03:54,221 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:03:54,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:03:54,222 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:03:54,223 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:03:54,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:03:54,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:03:54,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:03:54,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:03:54,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:03:54,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:54,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:03:54,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:03:54,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:03:54,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:03:54,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:03:54,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:03:54,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:03:54,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:03:54,229 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_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-10-31 22:03:54,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:03:54,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:03:54,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:03:54,561 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:03:54,562 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:03:54,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/verifythis/prefixsum_rec.c Unable to find full path for "g++" [2024-10-31 22:03:56,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:03:56,903 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:03:56,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-31 22:03:56,915 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/data/083d7bb9c/de6b5f0b6995459ba1cc216b97964ee8/FLAG16cfad7c3 [2024-10-31 22:03:56,935 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/data/083d7bb9c/de6b5f0b6995459ba1cc216b97964ee8 [2024-10-31 22:03:56,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:03:56,941 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:03:56,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:56,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:03:56,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:03:56,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:56" (1/1) ... [2024-10-31 22:03:56,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b422a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:56, skipping insertion in model container [2024-10-31 22:03:56,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:56" (1/1) ... [2024-10-31 22:03:56,984 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:03:57,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:57,263 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:03:57,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:57,321 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:03:57,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57 WrapperNode [2024-10-31 22:03:57,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:57,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:57,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:03:57,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:03:57,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,371 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-10-31 22:03:57,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:57,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:03:57,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:03:57,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:03:57,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,394 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,414 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-10-31 22:03:57,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:03:57,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:03:57,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:03:57,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:03:57,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (1/1) ... [2024-10-31 22:03:57,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:57,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:03:57,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:03:57,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:03:57,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 22:03:57,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 22:03:57,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:03:57,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:03:57,521 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-10-31 22:03:57,522 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-10-31 22:03:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:03:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:03:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:03:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-10-31 22:03:57,522 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-10-31 22:03:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:03:57,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:03:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:03:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:03:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-31 22:03:57,523 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-31 22:03:57,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:03:57,623 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:03:57,625 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:03:58,074 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-10-31 22:03:58,074 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:03:58,091 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:03:58,091 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:03:58,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:58 BoogieIcfgContainer [2024-10-31 22:03:58,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:03:58,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:03:58,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:03:58,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:03:58,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:03:56" (1/3) ... [2024-10-31 22:03:58,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b31893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:58, skipping insertion in model container [2024-10-31 22:03:58,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:57" (2/3) ... [2024-10-31 22:03:58,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b31893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:58, skipping insertion in model container [2024-10-31 22:03:58,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:58" (3/3) ... [2024-10-31 22:03:58,105 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-10-31 22:03:58,126 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:03:58,127 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-31 22:03:58,204 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:03:58,212 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@e54e8a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:03:58,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-31 22:03:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:03:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:03:58,229 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:58,230 INFO L215 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] [2024-10-31 22:03:58,251 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:03:58,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1272586388, now seen corresponding path program 1 times [2024-10-31 22:03:58,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:58,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496103665] [2024-10-31 22:03:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:58,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:03:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:58,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:03:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:58,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:03:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:58,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:03:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:03:58,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496103665] [2024-10-31 22:03:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496103665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:58,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:58,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:03:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619248995] [2024-10-31 22:03:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:58,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:03:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:03:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:03:58,714 INFO L87 Difference]: Start difference. First operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:03:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:58,884 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-10-31 22:03:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:03:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-31 22:03:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:58,900 INFO L225 Difference]: With dead ends: 115 [2024-10-31 22:03:58,900 INFO L226 Difference]: Without dead ends: 113 [2024-10-31 22:03:58,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:03:58,910 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:58,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 178 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:03:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-31 22:03:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-10-31 22:03:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:03:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-10-31 22:03:58,973 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 29 [2024-10-31 22:03:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:58,974 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-10-31 22:03:58,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:03:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-10-31 22:03:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:03:58,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:58,977 INFO L215 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] [2024-10-31 22:03:58,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:03:58,978 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:03:58,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 392066644, now seen corresponding path program 1 times [2024-10-31 22:03:58,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:58,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468899055] [2024-10-31 22:03:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:59,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:03:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:59,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:03:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:59,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:03:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:59,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:03:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:03:59,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468899055] [2024-10-31 22:03:59,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468899055] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:59,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:59,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:03:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307570057] [2024-10-31 22:03:59,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:59,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:03:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:59,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:03:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:03:59,429 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:03:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:59,689 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2024-10-31 22:03:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:03:59,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-10-31 22:03:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:59,692 INFO L225 Difference]: With dead ends: 110 [2024-10-31 22:03:59,694 INFO L226 Difference]: Without dead ends: 110 [2024-10-31 22:03:59,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:03:59,696 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 54 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:59,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 244 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:03:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-31 22:03:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-10-31 22:03:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.625) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:03:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-10-31 22:03:59,711 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 29 [2024-10-31 22:03:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:59,716 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-10-31 22:03:59,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:03:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-10-31 22:03:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:03:59,717 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:59,718 INFO L215 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] [2024-10-31 22:03:59,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:03:59,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:03:59,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash 392066645, now seen corresponding path program 1 times [2024-10-31 22:03:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862499124] [2024-10-31 22:03:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:00,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:00,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:00,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:04:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:00,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:04:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:00,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862499124] [2024-10-31 22:04:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862499124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:00,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:00,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-31 22:04:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591345168] [2024-10-31 22:04:00,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:00,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:04:00,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:04:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:04:00,822 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:01,840 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2024-10-31 22:04:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:04:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-10-31 22:04:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:01,843 INFO L225 Difference]: With dead ends: 135 [2024-10-31 22:04:01,843 INFO L226 Difference]: Without dead ends: 135 [2024-10-31 22:04:01,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:04:01,844 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 83 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:01,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 636 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 22:04:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-31 22:04:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2024-10-31 22:04:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.578125) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:04:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-10-31 22:04:01,858 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 29 [2024-10-31 22:04:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:01,859 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-10-31 22:04:01,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-10-31 22:04:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:01,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:01,861 INFO L215 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] [2024-10-31 22:04:01,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:04:01,862 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:01,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -730835859, now seen corresponding path program 1 times [2024-10-31 22:04:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:01,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973273362] [2024-10-31 22:04:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:01,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:04:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:04:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:02,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973273362] [2024-10-31 22:04:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973273362] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:02,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:02,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:04:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671720070] [2024-10-31 22:04:02,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:02,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:04:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:04:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:04:02,459 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:02,877 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2024-10-31 22:04:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:04:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-31 22:04:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:02,879 INFO L225 Difference]: With dead ends: 125 [2024-10-31 22:04:02,879 INFO L226 Difference]: Without dead ends: 125 [2024-10-31 22:04:02,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:04:02,880 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:02,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 374 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:04:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-31 22:04:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-10-31 22:04:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 97 states have internal predecessors, (107), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:04:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2024-10-31 22:04:02,890 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 30 [2024-10-31 22:04:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:02,891 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2024-10-31 22:04:02,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2024-10-31 22:04:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:02,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:02,893 INFO L215 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] [2024-10-31 22:04:02,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:04:02,893 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:02,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:02,894 INFO L85 PathProgramCache]: Analyzing trace with hash -730835860, now seen corresponding path program 1 times [2024-10-31 22:04:02,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:02,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999530103] [2024-10-31 22:04:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:02,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:04:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:04:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:02,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:02,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999530103] [2024-10-31 22:04:02,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999530103] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:02,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:02,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:04:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726219953] [2024-10-31 22:04:02,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:02,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:04:02,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:02,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:04:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:04:02,990 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:04:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:03,144 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-10-31 22:04:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:04:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-10-31 22:04:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:03,146 INFO L225 Difference]: With dead ends: 123 [2024-10-31 22:04:03,146 INFO L226 Difference]: Without dead ends: 123 [2024-10-31 22:04:03,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:04:03,148 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:03,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 254 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-31 22:04:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2024-10-31 22:04:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 96 states have internal predecessors, (105), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:04:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-10-31 22:04:03,158 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 30 [2024-10-31 22:04:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:03,159 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-10-31 22:04:03,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:04:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-10-31 22:04:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:03,160 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:03,160 INFO L215 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] [2024-10-31 22:04:03,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:04:03,161 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:03,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 529290709, now seen corresponding path program 1 times [2024-10-31 22:04:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342678760] [2024-10-31 22:04:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:04:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:04:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 22:04:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342678760] [2024-10-31 22:04:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342678760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:04,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589600781] [2024-10-31 22:04:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:04,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:04,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:04,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:04:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:04:04,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:04,587 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 6 treesize of output 5 [2024-10-31 22:04:04,601 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 7 [2024-10-31 22:04:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:04:05,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-10-31 22:04:05,041 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:05,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:04:05,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:05,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589600781] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:05,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:05,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2024-10-31 22:04:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781579328] [2024-10-31 22:04:05,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:05,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:04:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:04:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:04:05,819 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:04:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:07,845 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2024-10-31 22:04:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:04:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2024-10-31 22:04:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:07,848 INFO L225 Difference]: With dead ends: 123 [2024-10-31 22:04:07,848 INFO L226 Difference]: Without dead ends: 123 [2024-10-31 22:04:07,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 22:04:07,850 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 184 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:07,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 568 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 22:04:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-31 22:04:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2024-10-31 22:04:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 87 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:04:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2024-10-31 22:04:07,869 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 30 [2024-10-31 22:04:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:07,869 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2024-10-31 22:04:07,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:04:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2024-10-31 22:04:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:04:07,871 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:07,875 INFO L215 NwaCegarLoop]: trace histogram [2, 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] [2024-10-31 22:04:07,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:08,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:04:08,077 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:08,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1141814566, now seen corresponding path program 1 times [2024-10-31 22:04:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973673840] [2024-10-31 22:04:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 22:04:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:04:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:04:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973673840] [2024-10-31 22:04:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973673840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573569721] [2024-10-31 22:04:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:08,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:08,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:04:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:08,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:04:08,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:08,952 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 6 treesize of output 5 [2024-10-31 22:04:08,987 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 10 treesize of output 9 [2024-10-31 22:04:09,317 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:04:09,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-31 22:04:09,343 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:09,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:09,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:10,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573569721] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:10,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-31 22:04:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222427201] [2024-10-31 22:04:10,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:10,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:04:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:04:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-10-31 22:04:10,450 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-31 22:04:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:11,671 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2024-10-31 22:04:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:04:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-10-31 22:04:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:11,673 INFO L225 Difference]: With dead ends: 120 [2024-10-31 22:04:11,674 INFO L226 Difference]: Without dead ends: 117 [2024-10-31 22:04:11,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2024-10-31 22:04:11,675 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 263 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:11,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 479 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 22:04:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-31 22:04:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2024-10-31 22:04:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 91 states have internal predecessors, (96), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:04:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2024-10-31 22:04:11,689 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 33 [2024-10-31 22:04:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:11,690 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2024-10-31 22:04:11,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-31 22:04:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2024-10-31 22:04:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:04:11,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:11,692 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-10-31 22:04:11,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:11,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:04:11,896 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:11,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash 826925320, now seen corresponding path program 1 times [2024-10-31 22:04:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:11,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837380108] [2024-10-31 22:04:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:04:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:04:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 22:04:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 22:04:12,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837380108] [2024-10-31 22:04:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837380108] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729675139] [2024-10-31 22:04:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:12,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:12,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:12,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:04:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:12,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:04:12,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:12,536 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 10 treesize of output 9 [2024-10-31 22:04:12,714 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-31 22:04:12,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-10-31 22:04:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 22:04:13,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729675139] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:13,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:13,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-31 22:04:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631593819] [2024-10-31 22:04:13,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:13,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:04:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:04:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:04:13,817 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-31 22:04:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:14,676 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2024-10-31 22:04:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:04:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-10-31 22:04:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:14,677 INFO L225 Difference]: With dead ends: 114 [2024-10-31 22:04:14,677 INFO L226 Difference]: Without dead ends: 114 [2024-10-31 22:04:14,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:04:14,679 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:14,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 511 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 22:04:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-31 22:04:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2024-10-31 22:04:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:04:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-10-31 22:04:14,687 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 35 [2024-10-31 22:04:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:14,688 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-10-31 22:04:14,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-31 22:04:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-10-31 22:04:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:04:14,689 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:14,689 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:14,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:14,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:04:14,890 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:14,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1000164257, now seen corresponding path program 1 times [2024-10-31 22:04:14,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:14,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008527708] [2024-10-31 22:04:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:14,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:04:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:04:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 22:04:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:04:15,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008527708] [2024-10-31 22:04:15,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008527708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:15,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459614469] [2024-10-31 22:04:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:15,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:15,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:04:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:15,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-31 22:04:15,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:15,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 3 [2024-10-31 22:04:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:16,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459614469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:04:16,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:04:16,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 30 [2024-10-31 22:04:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563328626] [2024-10-31 22:04:16,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:16,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-31 22:04:16,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-31 22:04:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-10-31 22:04:16,584 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-31 22:04:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:17,409 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2024-10-31 22:04:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:04:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2024-10-31 22:04:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:17,411 INFO L225 Difference]: With dead ends: 136 [2024-10-31 22:04:17,412 INFO L226 Difference]: Without dead ends: 136 [2024-10-31 22:04:17,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:04:17,413 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 51 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:17,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1165 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:04:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-31 22:04:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2024-10-31 22:04:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 105 states have internal predecessors, (111), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:04:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2024-10-31 22:04:17,422 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 38 [2024-10-31 22:04:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:17,423 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2024-10-31 22:04:17,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-31 22:04:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2024-10-31 22:04:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 22:04:17,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:17,430 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:17,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:04:17,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:04:17,631 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:17,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1122482977, now seen corresponding path program 2 times [2024-10-31 22:04:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:17,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820116008] [2024-10-31 22:04:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:18,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:18,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:18,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:04:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:18,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:04:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820116008] [2024-10-31 22:04:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820116008] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183831356] [2024-10-31 22:04:18,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:04:18,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:18,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:18,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:04:18,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:04:18,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:04:18,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 22:04:18,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:18,568 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 10 treesize of output 9 [2024-10-31 22:04:18,793 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-31 22:04:18,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2024-10-31 22:04:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:04:19,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183831356] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:19,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2024-10-31 22:04:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606789207] [2024-10-31 22:04:19,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:19,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:04:19,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:04:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-10-31 22:04:19,938 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-31 22:04:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:22,880 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2024-10-31 22:04:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 22:04:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-10-31 22:04:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:22,882 INFO L225 Difference]: With dead ends: 158 [2024-10-31 22:04:22,883 INFO L226 Difference]: Without dead ends: 158 [2024-10-31 22:04:22,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-10-31 22:04:22,884 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 194 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:22,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1244 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-31 22:04:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-31 22:04:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2024-10-31 22:04:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 111 states have internal predecessors, (117), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:04:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2024-10-31 22:04:22,908 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 39 [2024-10-31 22:04:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:22,909 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2024-10-31 22:04:22,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-31 22:04:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2024-10-31 22:04:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:04:22,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:22,910 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2024-10-31 22:04:22,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:04:23,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96678a7c-0684-4b00-91eb-8853c142d250/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:23,111 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-31 22:04:23,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616107, now seen corresponding path program 1 times [2024-10-31 22:04:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788095140] [2024-10-31 22:04:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat