./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 08:05:04,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 08:05:04,115 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 08:05:04,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 08:05:04,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 08:05:04,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 08:05:04,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 08:05:04,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 08:05:04,142 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 08:05:04,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 08:05:04,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 08:05:04,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 08:05:04,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 08:05:04,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 08:05:04,145 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 08:05:04,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 08:05:04,146 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 08:05:04,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 08:05:04,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 08:05:04,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 08:05:04,149 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 08:05:04,149 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 08:05:04,150 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 08:05:04,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 08:05:04,150 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 08:05:04,150 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 08:05:04,150 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 08:05:04,151 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 08:05:04,151 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 08:05:04,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 08:05:04,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 08:05:04,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 08:05:04,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 08:05:04,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 08:05:04,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 08:05:04,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 08:05:04,152 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 08:05:04,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 08:05:04,152 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 08:05:04,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 08:05:04,153 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 08:05:04,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 08:05:04,153 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2024-11-09 08:05:04,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 08:05:04,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 08:05:04,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 08:05:04,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 08:05:04,353 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 08:05:04,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-09 08:05:05,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 08:05:05,701 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 08:05:05,701 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-09 08:05:05,712 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd6a5a65/62b2078a7fdb482a9925fa1b1ff36bec/FLAGcc739c7c5 [2024-11-09 08:05:05,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd6a5a65/62b2078a7fdb482a9925fa1b1ff36bec [2024-11-09 08:05:05,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 08:05:05,725 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 08:05:05,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 08:05:05,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 08:05:05,735 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 08:05:05,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:05:05" (1/1) ... [2024-11-09 08:05:05,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19429161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:05, skipping insertion in model container [2024-11-09 08:05:05,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:05:05" (1/1) ... [2024-11-09 08:05:05,765 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 08:05:06,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 08:05:06,011 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 08:05:06,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 08:05:06,090 INFO L204 MainTranslator]: Completed translation [2024-11-09 08:05:06,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06 WrapperNode [2024-11-09 08:05:06,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 08:05:06,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 08:05:06,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 08:05:06,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 08:05:06,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,129 INFO L138 Inliner]: procedures = 127, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 110 [2024-11-09 08:05:06,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 08:05:06,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 08:05:06,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 08:05:06,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 08:05:06,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,150 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-09 08:05:06,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 08:05:06,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 08:05:06,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 08:05:06,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 08:05:06,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (1/1) ... [2024-11-09 08:05:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 08:05:06,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:06,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 08:05:06,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-09 08:05:06,222 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-09 08:05:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 08:05:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 08:05:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 08:05:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 08:05:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 08:05:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 08:05:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 08:05:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 08:05:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 08:05:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 08:05:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 08:05:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 08:05:06,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 08:05:06,319 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 08:05:06,321 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 08:05:06,527 INFO L? ?]: Removed 82 outVars from TransFormulas that were not future-live. [2024-11-09 08:05:06,527 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 08:05:06,541 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 08:05:06,542 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 08:05:06,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:05:06 BoogieIcfgContainer [2024-11-09 08:05:06,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 08:05:06,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 08:05:06,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 08:05:06,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 08:05:06,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:05:05" (1/3) ... [2024-11-09 08:05:06,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549fcb87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:05:06, skipping insertion in model container [2024-11-09 08:05:06,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:05:06" (2/3) ... [2024-11-09 08:05:06,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549fcb87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:05:06, skipping insertion in model container [2024-11-09 08:05:06,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:05:06" (3/3) ... [2024-11-09 08:05:06,551 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2024-11-09 08:05:06,564 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 08:05:06,564 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-09 08:05:06,606 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 08:05:06,613 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;@467e1656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 08:05:06,614 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-09 08:05:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 08:05:06,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:06,623 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:06,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:06,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1813319865, now seen corresponding path program 1 times [2024-11-09 08:05:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394024121] [2024-11-09 08:05:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394024121] [2024-11-09 08:05:06,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394024121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:06,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:06,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 08:05:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124454037] [2024-11-09 08:05:06,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:06,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 08:05:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 08:05:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:05:06,846 INFO L87 Difference]: Start difference. First operand has 76 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:05:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:06,913 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-09 08:05:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 08:05:06,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 08:05:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:06,931 INFO L225 Difference]: With dead ends: 73 [2024-11-09 08:05:06,932 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 08:05:06,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:05:06,937 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:06,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 08:05:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 08:05:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-09 08:05:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-11-09 08:05:06,964 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 7 [2024-11-09 08:05:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:06,964 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-11-09 08:05:06,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:05:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-11-09 08:05:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 08:05:06,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:06,965 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:06,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 08:05:06,965 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:06,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1813319866, now seen corresponding path program 1 times [2024-11-09 08:05:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877642781] [2024-11-09 08:05:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:07,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877642781] [2024-11-09 08:05:07,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877642781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 08:05:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458908478] [2024-11-09 08:05:07,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:07,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 08:05:07,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 08:05:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:05:07,094 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:05:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:07,141 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2024-11-09 08:05:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 08:05:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 08:05:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:07,142 INFO L225 Difference]: With dead ends: 68 [2024-11-09 08:05:07,143 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 08:05:07,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:05:07,145 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:07,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 08:05:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 08:05:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 08:05:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.619047619047619) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-11-09 08:05:07,151 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2024-11-09 08:05:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:07,151 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-11-09 08:05:07,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:05:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-11-09 08:05:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 08:05:07,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:07,153 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:07,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 08:05:07,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:07,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1910914624, now seen corresponding path program 1 times [2024-11-09 08:05:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:07,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264672264] [2024-11-09 08:05:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264672264] [2024-11-09 08:05:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264672264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:07,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:05:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963278828] [2024-11-09 08:05:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:07,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:05:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:05:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:07,320 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:07,449 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-09 08:05:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 08:05:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:07,450 INFO L225 Difference]: With dead ends: 67 [2024-11-09 08:05:07,451 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 08:05:07,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:07,453 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:07,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 08:05:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-09 08:05:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-09 08:05:07,460 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 13 [2024-11-09 08:05:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:07,463 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-09 08:05:07,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-09 08:05:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 08:05:07,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:07,465 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:07,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 08:05:07,465 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:07,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1910914623, now seen corresponding path program 1 times [2024-11-09 08:05:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:07,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041178072] [2024-11-09 08:05:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:07,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041178072] [2024-11-09 08:05:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041178072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:07,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:07,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:05:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399152141] [2024-11-09 08:05:07,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:07,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:05:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:05:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:07,697 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:07,838 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-09 08:05:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 08:05:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:07,839 INFO L225 Difference]: With dead ends: 66 [2024-11-09 08:05:07,839 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 08:05:07,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:07,840 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:07,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 255 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 08:05:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-09 08:05:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-09 08:05:07,848 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 13 [2024-11-09 08:05:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:07,848 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-09 08:05:07,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-09 08:05:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 08:05:07,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:07,848 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:07,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 08:05:07,849 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:07,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1821850304, now seen corresponding path program 1 times [2024-11-09 08:05:07,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:07,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361161418] [2024-11-09 08:05:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:07,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-09 08:05:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:07,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361161418] [2024-11-09 08:05:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361161418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:07,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 08:05:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40667880] [2024-11-09 08:05:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:07,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 08:05:07,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:07,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 08:05:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:05:07,911 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:07,955 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-09 08:05:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 08:05:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-09 08:05:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:07,956 INFO L225 Difference]: With dead ends: 72 [2024-11-09 08:05:07,956 INFO L226 Difference]: Without dead ends: 72 [2024-11-09 08:05:07,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:05:07,957 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:07,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 08:05:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-09 08:05:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-11-09 08:05:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.558139534883721) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-09 08:05:07,961 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 15 [2024-11-09 08:05:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:07,962 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-09 08:05:07,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:05:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-09 08:05:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 08:05:07,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:07,963 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] [2024-11-09 08:05:07,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 08:05:07,963 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:07,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash -411483326, now seen corresponding path program 1 times [2024-11-09 08:05:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:07,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943420355] [2024-11-09 08:05:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:05:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 08:05:08,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943420355] [2024-11-09 08:05:08,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943420355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218315577] [2024-11-09 08:05:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:08,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:08,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:08,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:08,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 08:05:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 08:05:08,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:05:08,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:05:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 08:05:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218315577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 08:05:08,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 08:05:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-11-09 08:05:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986895843] [2024-11-09 08:05:08,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 08:05:08,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 08:05:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 08:05:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 08:05:08,241 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:05:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:08,293 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-09 08:05:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 08:05:08,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-09 08:05:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:08,294 INFO L225 Difference]: With dead ends: 73 [2024-11-09 08:05:08,294 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 08:05:08,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 08:05:08,295 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:08,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 225 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 08:05:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 08:05:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-09 08:05:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.5) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-11-09 08:05:08,299 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 28 [2024-11-09 08:05:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:08,299 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-11-09 08:05:08,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:05:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-11-09 08:05:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 08:05:08,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:08,301 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:08,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 08:05:08,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 08:05:08,505 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:08,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1287953920, now seen corresponding path program 2 times [2024-11-09 08:05:08,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:08,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444152591] [2024-11-09 08:05:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:08,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 08:05:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444152591] [2024-11-09 08:05:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444152591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625307588] [2024-11-09 08:05:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 08:05:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:09,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:09,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 08:05:09,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 08:05:09,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 08:05:09,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 08:05:09,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:09,194 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 [2024-11-09 08:05:09,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 08:05:09,285 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 08:05:09,286 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 14 treesize of output 13 [2024-11-09 08:05:09,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 08:05:09,383 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-09 08:05:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:09,428 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 14 treesize of output 9 [2024-11-09 08:05:09,454 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-09 08:05:09,480 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 08:05:09,481 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 12 treesize of output 14 [2024-11-09 08:05:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 18 not checked. [2024-11-09 08:05:09,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:05:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625307588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:09,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:05:09,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2024-11-09 08:05:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781203043] [2024-11-09 08:05:09,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:05:09,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 08:05:09,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 08:05:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=221, Unknown=2, NotChecked=62, Total=342 [2024-11-09 08:05:09,664 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 08:05:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:09,908 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-09 08:05:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-11-09 08:05:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:09,909 INFO L225 Difference]: With dead ends: 81 [2024-11-09 08:05:09,909 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 08:05:09,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=307, Unknown=2, NotChecked=74, Total=462 [2024-11-09 08:05:09,910 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:09,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 247 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2024-11-09 08:05:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 08:05:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2024-11-09 08:05:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-11-09 08:05:09,914 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 41 [2024-11-09 08:05:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:09,914 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-11-09 08:05:09,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 08:05:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-11-09 08:05:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 08:05:09,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:09,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:09,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 08:05:10,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 08:05:10,118 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:10,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1287953921, now seen corresponding path program 1 times [2024-11-09 08:05:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003325551] [2024-11-09 08:05:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:10,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:10,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:10,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:10,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 08:05:10,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003325551] [2024-11-09 08:05:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003325551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203083412] [2024-11-09 08:05:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:10,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:10,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 08:05:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:10,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 08:05:10,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:10,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:05:10,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 08:05:10,761 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-09 08:05:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:10,804 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 14 treesize of output 9 [2024-11-09 08:05:10,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 08:05:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:10,882 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 14 treesize of output 9 [2024-11-09 08:05:10,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 08:05:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:10,973 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 14 treesize of output 9 [2024-11-09 08:05:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 08:05:10,990 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 08:05:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203083412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 08:05:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2024-11-09 08:05:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482779506] [2024-11-09 08:05:10,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:10,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:05:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:05:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2024-11-09 08:05:10,992 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:11,055 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-11-09 08:05:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-09 08:05:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:11,056 INFO L225 Difference]: With dead ends: 67 [2024-11-09 08:05:11,056 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 08:05:11,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2024-11-09 08:05:11,057 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:11,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 151 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2024-11-09 08:05:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 08:05:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-09 08:05:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.375) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-09 08:05:11,062 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 41 [2024-11-09 08:05:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:11,062 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-09 08:05:11,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-09 08:05:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 08:05:11,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:11,063 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:11,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 08:05:11,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:11,264 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:11,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1271865857, now seen corresponding path program 1 times [2024-11-09 08:05:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:11,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334812478] [2024-11-09 08:05:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 08:05:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:11,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334812478] [2024-11-09 08:05:11,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334812478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:11,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:11,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:05:11,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427680062] [2024-11-09 08:05:11,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:11,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:05:11,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:05:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:11,450 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:05:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:11,528 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-09 08:05:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-09 08:05:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:11,529 INFO L225 Difference]: With dead ends: 66 [2024-11-09 08:05:11,529 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 08:05:11,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:11,530 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:11,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 228 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 08:05:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-09 08:05:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-09 08:05:11,533 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 42 [2024-11-09 08:05:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:11,533 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-09 08:05:11,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:05:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-09 08:05:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 08:05:11,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:11,534 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:11,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 08:05:11,534 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:11,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1271865856, now seen corresponding path program 1 times [2024-11-09 08:05:11,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675571104] [2024-11-09 08:05:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 08:05:11,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675571104] [2024-11-09 08:05:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675571104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:11,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:11,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:05:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514600713] [2024-11-09 08:05:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:11,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:05:11,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:05:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:11,642 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:05:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:11,716 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-11-09 08:05:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-09 08:05:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:11,717 INFO L225 Difference]: With dead ends: 65 [2024-11-09 08:05:11,717 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 08:05:11,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:05:11,717 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:11,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 220 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 08:05:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-09 08:05:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-11-09 08:05:11,720 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2024-11-09 08:05:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:11,721 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-11-09 08:05:11,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:05:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-11-09 08:05:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 08:05:11,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:11,722 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:11,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 08:05:11,722 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:11,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:11,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1418752221, now seen corresponding path program 1 times [2024-11-09 08:05:11,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812419812] [2024-11-09 08:05:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 08:05:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812419812] [2024-11-09 08:05:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812419812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:11,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:11,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 08:05:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388038348] [2024-11-09 08:05:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:11,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 08:05:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 08:05:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-09 08:05:11,914 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:11,988 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-09 08:05:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:05:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2024-11-09 08:05:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:11,989 INFO L225 Difference]: With dead ends: 63 [2024-11-09 08:05:11,990 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 08:05:11,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-09 08:05:11,991 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:11,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 176 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 08:05:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-09 08:05:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-09 08:05:11,994 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2024-11-09 08:05:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:11,994 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-09 08:05:11,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-09 08:05:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 08:05:11,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:11,995 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:11,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 08:05:11,996 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:11,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 725726539, now seen corresponding path program 1 times [2024-11-09 08:05:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531221431] [2024-11-09 08:05:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 08:05:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531221431] [2024-11-09 08:05:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531221431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:12,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:12,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 08:05:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008291191] [2024-11-09 08:05:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:12,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 08:05:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 08:05:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 08:05:12,242 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:12,355 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-09 08:05:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 08:05:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2024-11-09 08:05:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:12,356 INFO L225 Difference]: With dead ends: 64 [2024-11-09 08:05:12,356 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 08:05:12,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 08:05:12,357 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:12,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 233 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 08:05:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-09 08:05:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.3) internal successors, (65), 59 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2024-11-09 08:05:12,364 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 49 [2024-11-09 08:05:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:12,364 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2024-11-09 08:05:12,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2024-11-09 08:05:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 08:05:12,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:12,365 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:05:12,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 08:05:12,365 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:12,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 725726540, now seen corresponding path program 1 times [2024-11-09 08:05:12,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:12,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216274988] [2024-11-09 08:05:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:12,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 08:05:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216274988] [2024-11-09 08:05:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216274988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:12,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 08:05:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564064638] [2024-11-09 08:05:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:12,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 08:05:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 08:05:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 08:05:12,698 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:12,812 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-09 08:05:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 08:05:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2024-11-09 08:05:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:12,813 INFO L225 Difference]: With dead ends: 66 [2024-11-09 08:05:12,813 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 08:05:12,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 08:05:12,814 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:12,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 258 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 08:05:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-09 08:05:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-11-09 08:05:12,816 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 49 [2024-11-09 08:05:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:12,817 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-11-09 08:05:12,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-11-09 08:05:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 08:05:12,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:12,817 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-09 08:05:12,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 08:05:12,818 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:12,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash -747315640, now seen corresponding path program 1 times [2024-11-09 08:05:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:12,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732191257] [2024-11-09 08:05:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:12,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 08:05:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732191257] [2024-11-09 08:05:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732191257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:13,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:13,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 08:05:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595518658] [2024-11-09 08:05:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:13,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 08:05:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 08:05:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 08:05:13,037 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:13,121 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-09 08:05:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 08:05:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2024-11-09 08:05:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:13,122 INFO L225 Difference]: With dead ends: 66 [2024-11-09 08:05:13,122 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 08:05:13,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 08:05:13,122 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:13,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 307 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 08:05:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-09 08:05:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.25) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-09 08:05:13,125 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2024-11-09 08:05:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:13,125 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-09 08:05:13,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-09 08:05:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 08:05:13,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:13,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2024-11-09 08:05:13,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 08:05:13,126 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:13,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 334462294, now seen corresponding path program 1 times [2024-11-09 08:05:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641002631] [2024-11-09 08:05:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:13,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:13,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:13,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 08:05:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641002631] [2024-11-09 08:05:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641002631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:13,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558582415] [2024-11-09 08:05:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:13,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:13,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 08:05:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:14,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-09 08:05:14,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:14,090 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 [2024-11-09 08:05:14,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-09 08:05:14,317 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 08:05:14,317 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 21 [2024-11-09 08:05:14,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 08:05:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:14,551 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:14,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-09 08:05:14,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 08:05:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:14,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-09 08:05:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:14,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:05:14,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-09 08:05:14,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:05:14,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-09 08:05:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:05:14,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:05:15,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-09 08:05:40,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2024-11-09 08:05:40,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2024-11-09 08:05:40,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2024-11-09 08:05:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558582415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:40,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:05:40,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2024-11-09 08:05:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361721105] [2024-11-09 08:05:40,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:05:40,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 08:05:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 08:05:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2391, Unknown=4, NotChecked=0, Total=2550 [2024-11-09 08:05:40,902 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 08:05:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:41,908 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-11-09 08:05:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 08:05:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-09 08:05:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:41,909 INFO L225 Difference]: With dead ends: 73 [2024-11-09 08:05:41,909 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 08:05:41,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=283, Invalid=3745, Unknown=4, NotChecked=0, Total=4032 [2024-11-09 08:05:41,910 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 107 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:41,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 646 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 08:05:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 08:05:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-11-09 08:05:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.290909090909091) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-09 08:05:41,916 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 54 [2024-11-09 08:05:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:41,916 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-09 08:05:41,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 08:05:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-09 08:05:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 08:05:41,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:41,918 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2024-11-09 08:05:41,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 08:05:42,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 08:05:42,119 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:42,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 334462295, now seen corresponding path program 1 times [2024-11-09 08:05:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:42,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106535856] [2024-11-09 08:05:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:42,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:42,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:43,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 08:05:43,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106535856] [2024-11-09 08:05:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106535856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961738201] [2024-11-09 08:05:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:43,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:43,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 08:05:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:43,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 08:05:43,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:43,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:05:43,356 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 [2024-11-09 08:05:43,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-09 08:05:43,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-09 08:05:43,812 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 08:05:43,812 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 21 [2024-11-09 08:05:43,833 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-09 08:05:43,833 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 15 treesize of output 15 [2024-11-09 08:05:44,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-09 08:05:44,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-09 08:05:44,167 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:44,180 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-11-09 08:05:44,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2024-11-09 08:05:44,185 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:44,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 31 [2024-11-09 08:05:44,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2024-11-09 08:05:44,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-09 08:05:44,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-09 08:05:44,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2024-11-09 08:05:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:05:44,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:05:44,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 76 [2024-11-09 08:05:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:44,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2024-11-09 08:05:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:05:44,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2024-11-09 08:05:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961738201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:45,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:05:45,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2024-11-09 08:05:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484635064] [2024-11-09 08:05:45,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:05:45,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 08:05:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 08:05:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2607, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 08:05:45,119 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 08:05:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:46,521 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-11-09 08:05:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 08:05:46,522 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-09 08:05:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:46,522 INFO L225 Difference]: With dead ends: 82 [2024-11-09 08:05:46,523 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 08:05:46,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=297, Invalid=4533, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 08:05:46,524 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:46,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 920 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 08:05:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 08:05:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-11-09 08:05:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2024-11-09 08:05:46,527 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 54 [2024-11-09 08:05:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:46,527 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2024-11-09 08:05:46,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 08:05:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2024-11-09 08:05:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 08:05:46,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:46,528 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-09 08:05:46,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 08:05:46,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 08:05:46,728 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:46,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1778385747, now seen corresponding path program 1 times [2024-11-09 08:05:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541170442] [2024-11-09 08:05:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 08:05:47,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:47,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541170442] [2024-11-09 08:05:47,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541170442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:05:47,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:05:47,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-09 08:05:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099405976] [2024-11-09 08:05:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:05:47,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 08:05:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 08:05:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 08:05:47,150 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:05:47,317 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2024-11-09 08:05:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 08:05:47,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2024-11-09 08:05:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:05:47,318 INFO L225 Difference]: With dead ends: 82 [2024-11-09 08:05:47,318 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 08:05:47,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-11-09 08:05:47,319 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:05:47,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 416 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:05:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 08:05:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-11-09 08:05:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:05:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2024-11-09 08:05:47,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 55 [2024-11-09 08:05:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:05:47,321 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2024-11-09 08:05:47,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:05:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2024-11-09 08:05:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 08:05:47,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:05:47,321 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2024-11-09 08:05:47,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 08:05:47,322 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:05:47,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:05:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash -359197091, now seen corresponding path program 1 times [2024-11-09 08:05:47,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:05:47,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725158117] [2024-11-09 08:05:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:47,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:05:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:05:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:05:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:05:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 08:05:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:05:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725158117] [2024-11-09 08:05:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725158117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:05:47,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055911300] [2024-11-09 08:05:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:05:47,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:05:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:05:47,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:05:47,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 08:05:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:05:48,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 08:05:48,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:05:48,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-09 08:05:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:48,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2024-11-09 08:05:48,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 08:05:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:48,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 08:05:48,376 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 08:05:48,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:05:48,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2024-11-09 08:05:48,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-09 08:05:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:05:48,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:05:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2024-11-09 08:05:48,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-09 08:05:48,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:05:48,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-09 08:05:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 08:05:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055911300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 08:05:48,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 08:05:48,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 44 [2024-11-09 08:05:48,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323559092] [2024-11-09 08:05:48,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 08:05:48,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 08:05:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:05:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 08:05:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 08:05:48,798 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 08:05:52,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:05:56,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:06:00,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:06:04,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:06:08,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:06:13,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:06:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:06:13,682 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2024-11-09 08:06:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 08:06:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2024-11-09 08:06:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:06:13,683 INFO L225 Difference]: With dead ends: 78 [2024-11-09 08:06:13,683 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 08:06:13,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=308, Invalid=3724, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 08:06:13,684 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 92 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2024-11-09 08:06:13,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1101 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2024-11-09 08:06:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 08:06:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-09 08:06:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:06:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-11-09 08:06:13,686 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 57 [2024-11-09 08:06:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:06:13,688 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-11-09 08:06:13,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 08:06:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-11-09 08:06:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 08:06:13,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:06:13,689 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2024-11-09 08:06:13,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 08:06:13,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 08:06:13,890 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:06:13,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:06:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -345766869, now seen corresponding path program 2 times [2024-11-09 08:06:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:06:13,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153399258] [2024-11-09 08:06:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:06:13,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:06:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:15,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:06:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:15,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:06:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:15,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:06:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:06:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:06:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153399258] [2024-11-09 08:06:15,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153399258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:06:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337554359] [2024-11-09 08:06:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 08:06:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:06:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:06:15,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:06:15,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 08:06:15,678 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 08:06:15,678 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 08:06:15,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-09 08:06:15,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:06:15,879 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 08:06:15,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 08:06:15,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 08:06:16,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-09 08:06:16,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 08:06:16,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:06:16,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 27 [2024-11-09 08:06:16,388 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2024-11-09 08:06:16,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2024-11-09 08:06:16,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 08:06:16,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 40 [2024-11-09 08:06:16,831 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-09 08:06:16,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 44 [2024-11-09 08:06:16,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 85 treesize of output 46 [2024-11-09 08:06:16,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 66 [2024-11-09 08:06:17,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:06:17,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-09 08:06:17,397 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2024-11-09 08:06:17,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 37 [2024-11-09 08:06:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:06:17,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:06:18,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 48 [2024-11-09 08:06:23,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:06:23,138 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 209 [2024-11-09 08:06:23,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337554359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:06:23,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:06:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2024-11-09 08:06:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243300143] [2024-11-09 08:06:23,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:06:23,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 08:06:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:06:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 08:06:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=5445, Unknown=1, NotChecked=0, Total=5700 [2024-11-09 08:06:23,620 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 65 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 57 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:06:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:06:26,307 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2024-11-09 08:06:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 08:06:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 57 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2024-11-09 08:06:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:06:26,309 INFO L225 Difference]: With dead ends: 88 [2024-11-09 08:06:26,309 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 08:06:26,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=568, Invalid=10561, Unknown=1, NotChecked=0, Total=11130 [2024-11-09 08:06:26,311 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 134 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:06:26,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1027 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 08:06:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 08:06:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2024-11-09 08:06:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:06:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-09 08:06:26,314 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 59 [2024-11-09 08:06:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:06:26,314 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-09 08:06:26,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 57 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:06:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-09 08:06:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 08:06:26,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:06:26,315 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2024-11-09 08:06:26,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 08:06:26,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:06:26,516 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-09 08:06:26,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:06:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash -345766868, now seen corresponding path program 2 times [2024-11-09 08:06:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:06:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311203513] [2024-11-09 08:06:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:06:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:06:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:27,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:06:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:27,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 08:06:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:28,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 08:06:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:06:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:06:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:06:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311203513] [2024-11-09 08:06:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311203513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:06:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30471442] [2024-11-09 08:06:28,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 08:06:28,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:06:28,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:06:28,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:06:28,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 08:06:28,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 08:06:28,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 08:06:28,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-11-09 08:06:28,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:06:28,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:06:28,864 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 08:06:28,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 08:06:28,871 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 14 treesize of output 9 [2024-11-09 08:06:28,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 08:06:28,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 08:06:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-11-09 08:06:29,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 08:06:29,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-09 08:06:29,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-09 08:06:29,555 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 08:06:29,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 23 [2024-11-09 08:06:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:06:29,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 34 [2024-11-09 08:06:29,586 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-09 08:06:29,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-09 08:06:29,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-09 08:06:29,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 40 [2024-11-09 08:06:29,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 08:06:30,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 48 [2024-11-09 08:06:30,114 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-09 08:06:30,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 44 [2024-11-09 08:06:30,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 63 [2024-11-09 08:06:30,726 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2024-11-09 08:06:30,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 48 [2024-11-09 08:06:30,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 08:06:30,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2024-11-09 08:06:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:06:30,883 INFO L311 TraceCheckSpWp]: Computing backward predicates...