./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/dll2c_insert_unequal.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 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 00:45:31,145 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 00:45:31,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 00:45:31,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 00:45:31,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 00:45:31,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 00:45:31,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 00:45:31,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 00:45:31,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 00:45:31,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 00:45:31,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 00:45:31,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 00:45:31,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 00:45:31,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 00:45:31,267 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 00:45:31,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 00:45:31,269 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 00:45:31,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 00:45:31,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 00:45:31,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 00:45:31,270 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 00:45:31,270 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 00:45:31,273 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 00:45:31,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 00:45:31,274 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 00:45:31,274 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 00:45:31,274 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 00:45:31,274 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 00:45:31,275 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 00:45:31,275 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 00:45:31,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 00:45:31,275 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 00:45:31,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 00:45:31,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 00:45:31,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 00:45:31,276 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 00:45:31,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 00:45:31,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 00:45:31,277 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 00:45:31,277 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 00:45:31,277 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 00:45:31,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 00:45:31,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2024-11-17 00:45:31,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 00:45:31,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 00:45:31,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 00:45:31,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 00:45:31,548 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 00:45:31,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2024-11-17 00:45:33,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 00:45:33,280 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 00:45:33,281 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2024-11-17 00:45:33,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbc9a5ca/2e374e80806b4df08aa5b9fd761d4cb8/FLAG7a68d74ee [2024-11-17 00:45:33,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbc9a5ca/2e374e80806b4df08aa5b9fd761d4cb8 [2024-11-17 00:45:33,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 00:45:33,320 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 00:45:33,321 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 00:45:33,321 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 00:45:33,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 00:45:33,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636c57e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33, skipping insertion in model container [2024-11-17 00:45:33,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 00:45:33,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 00:45:33,707 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 00:45:33,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 00:45:33,802 INFO L204 MainTranslator]: Completed translation [2024-11-17 00:45:33,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33 WrapperNode [2024-11-17 00:45:33,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 00:45:33,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 00:45:33,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 00:45:33,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 00:45:33,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,871 INFO L138 Inliner]: procedures = 127, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 190 [2024-11-17 00:45:33,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 00:45:33,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 00:45:33,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 00:45:33,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 00:45:33,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,925 INFO L175 MemorySlicer]: Split 40 memory accesses to 3 slices as follows [2, 26, 12]. 65 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 18 writes are split as follows [0, 17, 1]. [2024-11-17 00:45:33,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,937 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 00:45:33,949 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 00:45:33,949 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 00:45:33,949 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 00:45:33,950 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (1/1) ... [2024-11-17 00:45:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 00:45:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:34,001 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) [2024-11-17 00:45:34,007 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 [2024-11-17 00:45:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 00:45:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-17 00:45:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 00:45:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 00:45:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-17 00:45:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 00:45:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 00:45:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 00:45:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-17 00:45:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 00:45:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 00:45:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 00:45:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 00:45:34,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 00:45:34,228 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 00:45:34,230 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 00:45:34,806 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L642: call ULTIMATE.dealloc(main_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset; [2024-11-17 00:45:34,839 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint myexit_returnLabel#1: assume true;havoc myexit_~s#1;havoc myexit_#in~s#1;assume { :end_inline_myexit } true; [2024-11-17 00:45:34,875 INFO L? ?]: Removed 197 outVars from TransFormulas that were not future-live. [2024-11-17 00:45:34,876 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 00:45:34,899 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 00:45:34,900 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 00:45:34,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 12:45:34 BoogieIcfgContainer [2024-11-17 00:45:34,900 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 00:45:34,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 00:45:34,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 00:45:34,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 00:45:34,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:45:33" (1/3) ... [2024-11-17 00:45:34,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136003fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:45:34, skipping insertion in model container [2024-11-17 00:45:34,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:45:33" (2/3) ... [2024-11-17 00:45:34,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136003fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:45:34, skipping insertion in model container [2024-11-17 00:45:34,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 12:45:34" (3/3) ... [2024-11-17 00:45:34,910 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2024-11-17 00:45:34,928 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 00:45:34,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2024-11-17 00:45:34,982 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 00:45:34,990 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;@52f16b80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 00:45:34,991 INFO L334 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2024-11-17 00:45:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 181 states have internal predecessors, (201), 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) [2024-11-17 00:45:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-17 00:45:35,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:35,002 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 00:45:35,003 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:35,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1874711563, now seen corresponding path program 1 times [2024-11-17 00:45:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792508261] [2024-11-17 00:45:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:45:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792508261] [2024-11-17 00:45:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792508261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:35,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:35,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 00:45:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812340289] [2024-11-17 00:45:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:35,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 00:45:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 00:45:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 00:45:35,442 INFO L87 Difference]: Start difference. First operand has 186 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 181 states have internal predecessors, (201), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 00:45:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:35,683 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2024-11-17 00:45:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 00:45:35,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-17 00:45:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:35,693 INFO L225 Difference]: With dead ends: 182 [2024-11-17 00:45:35,693 INFO L226 Difference]: Without dead ends: 178 [2024-11-17 00:45:35,694 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 [2024-11-17 00:45:35,697 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 3 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:35,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 303 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-17 00:45:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-17 00:45:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 95 states have (on average 1.9473684210526316) internal successors, (185), 173 states have internal predecessors, (185), 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) [2024-11-17 00:45:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 191 transitions. [2024-11-17 00:45:35,741 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 191 transitions. Word has length 6 [2024-11-17 00:45:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:35,742 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 191 transitions. [2024-11-17 00:45:35,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 00:45:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 191 transitions. [2024-11-17 00:45:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-17 00:45:35,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:35,743 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 00:45:35,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 00:45:35,743 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:35,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1874711564, now seen corresponding path program 1 times [2024-11-17 00:45:35,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:35,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110100489] [2024-11-17 00:45:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:45:35,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:35,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110100489] [2024-11-17 00:45:35,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110100489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:35,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:35,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 00:45:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47821341] [2024-11-17 00:45:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:35,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 00:45:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 00:45:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 00:45:35,820 INFO L87 Difference]: Start difference. First operand 178 states and 191 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 00:45:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:35,961 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2024-11-17 00:45:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 00:45:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-17 00:45:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:35,963 INFO L225 Difference]: With dead ends: 175 [2024-11-17 00:45:35,963 INFO L226 Difference]: Without dead ends: 175 [2024-11-17 00:45:35,963 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 [2024-11-17 00:45:35,964 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 3 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:35,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 287 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-17 00:45:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-17 00:45:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-17 00:45:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 95 states have (on average 1.9157894736842105) internal successors, (182), 170 states have internal predecessors, (182), 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) [2024-11-17 00:45:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2024-11-17 00:45:35,979 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 6 [2024-11-17 00:45:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:35,980 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2024-11-17 00:45:35,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-17 00:45:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2024-11-17 00:45:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-17 00:45:35,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:35,981 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:35,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 00:45:35,981 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:35,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 641927502, now seen corresponding path program 1 times [2024-11-17 00:45:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043921390] [2024-11-17 00:45:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:36,115 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:45:36,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:36,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043921390] [2024-11-17 00:45:36,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043921390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:36,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:36,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 00:45:36,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150689598] [2024-11-17 00:45:36,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:36,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 00:45:36,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 00:45:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 00:45:36,156 INFO L87 Difference]: Start difference. First operand 175 states and 188 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) [2024-11-17 00:45:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:36,346 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2024-11-17 00:45:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 00:45:36,347 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 [2024-11-17 00:45:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:36,348 INFO L225 Difference]: With dead ends: 187 [2024-11-17 00:45:36,349 INFO L226 Difference]: Without dead ends: 187 [2024-11-17 00:45:36,349 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 [2024-11-17 00:45:36,350 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 10 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:36,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 432 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-17 00:45:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2024-11-17 00:45:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 97 states have (on average 1.8969072164948453) internal successors, (184), 172 states have internal predecessors, (184), 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) [2024-11-17 00:45:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2024-11-17 00:45:36,370 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 15 [2024-11-17 00:45:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:36,370 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2024-11-17 00:45:36,374 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) [2024-11-17 00:45:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2024-11-17 00:45:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-17 00:45:36,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:36,375 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:36,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 00:45:36,375 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:36,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 864490675, now seen corresponding path program 1 times [2024-11-17 00:45:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758822733] [2024-11-17 00:45:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:36,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:36,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:45:36,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758822733] [2024-11-17 00:45:36,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758822733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:36,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:36,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 00:45:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067376808] [2024-11-17 00:45:36,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:36,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:36,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:36,696 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-17 00:45:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:37,139 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2024-11-17 00:45:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2024-11-17 00:45:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:37,141 INFO L225 Difference]: With dead ends: 176 [2024-11-17 00:45:37,141 INFO L226 Difference]: Without dead ends: 176 [2024-11-17 00:45:37,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:37,142 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 7 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:37,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 623 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-17 00:45:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-17 00:45:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2024-11-17 00:45:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 171 states have internal predecessors, (183), 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) [2024-11-17 00:45:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 189 transitions. [2024-11-17 00:45:37,155 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 189 transitions. Word has length 25 [2024-11-17 00:45:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:37,159 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 189 transitions. [2024-11-17 00:45:37,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-11-17 00:45:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 189 transitions. [2024-11-17 00:45:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-17 00:45:37,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:37,160 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:37,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 00:45:37,161 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr75REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:37,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 864490676, now seen corresponding path program 1 times [2024-11-17 00:45:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:37,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336260694] [2024-11-17 00:45:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:37,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:37,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:37,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:37,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:37,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336260694] [2024-11-17 00:45:37,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336260694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:37,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:37,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 00:45:37,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134310871] [2024-11-17 00:45:37,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:37,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:37,477 INFO L87 Difference]: Start difference. First operand 176 states and 189 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-17 00:45:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:37,811 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2024-11-17 00:45:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 25 [2024-11-17 00:45:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:37,812 INFO L225 Difference]: With dead ends: 175 [2024-11-17 00:45:37,812 INFO L226 Difference]: Without dead ends: 175 [2024-11-17 00:45:37,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:37,814 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 6 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:37,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 655 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-17 00:45:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-17 00:45:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-17 00:45:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 170 states have internal predecessors, (182), 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) [2024-11-17 00:45:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2024-11-17 00:45:37,827 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 25 [2024-11-17 00:45:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:37,828 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2024-11-17 00:45:37,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-17 00:45:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2024-11-17 00:45:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-17 00:45:37,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:37,829 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:37,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 00:45:37,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr72REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:37,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1846855440, now seen corresponding path program 1 times [2024-11-17 00:45:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310275874] [2024-11-17 00:45:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:38,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:38,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310275874] [2024-11-17 00:45:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310275874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520276227] [2024-11-17 00:45:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:38,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:38,194 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) [2024-11-17 00:45:38,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 00:45:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:38,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 00:45:38,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:38,382 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 [2024-11-17 00:45:38,499 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 00:45:38,499 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 [2024-11-17 00:45:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:45:38,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:45:38,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520276227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 00:45:38,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 00:45:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2024-11-17 00:45:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322117328] [2024-11-17 00:45:38,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:38,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 00:45:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 00:45:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-17 00:45:38,881 INFO L87 Difference]: Start difference. First operand 175 states and 188 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-17 00:45:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:39,534 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2024-11-17 00:45:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-11-17 00:45:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:39,536 INFO L225 Difference]: With dead ends: 180 [2024-11-17 00:45:39,536 INFO L226 Difference]: Without dead ends: 180 [2024-11-17 00:45:39,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-17 00:45:39,537 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:39,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1089 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-17 00:45:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-17 00:45:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-17 00:45:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 101 states have (on average 1.8613861386138615) internal successors, (188), 174 states have internal predecessors, (188), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 196 transitions. [2024-11-17 00:45:39,543 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 196 transitions. Word has length 27 [2024-11-17 00:45:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:39,543 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 196 transitions. [2024-11-17 00:45:39,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-17 00:45:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 196 transitions. [2024-11-17 00:45:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-17 00:45:39,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:39,545 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:39,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 00:45:39,748 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 [2024-11-17 00:45:39,749 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:39,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1846855441, now seen corresponding path program 1 times [2024-11-17 00:45:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498583163] [2024-11-17 00:45:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:39,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:40,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498583163] [2024-11-17 00:45:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498583163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410039232] [2024-11-17 00:45:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:40,195 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) [2024-11-17 00:45:40,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 00:45:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:40,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 00:45:40,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:40,363 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 [2024-11-17 00:45:40,371 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 [2024-11-17 00:45:40,555 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-17 00:45:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:40,615 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 [2024-11-17 00:45:40,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 00:45:40,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 00:45:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-17 00:45:40,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410039232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:40,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:45:40,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2024-11-17 00:45:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849295629] [2024-11-17 00:45:40,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:40,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 00:45:40,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 00:45:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2024-11-17 00:45:40,802 INFO L87 Difference]: Start difference. First operand 180 states and 196 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 00:45:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:41,589 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2024-11-17 00:45:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 00:45:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-11-17 00:45:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:41,591 INFO L225 Difference]: With dead ends: 180 [2024-11-17 00:45:41,591 INFO L226 Difference]: Without dead ends: 180 [2024-11-17 00:45:41,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=355, Unknown=1, NotChecked=38, Total=462 [2024-11-17 00:45:41,592 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 1 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:41,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 988 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1028 Invalid, 0 Unknown, 188 Unchecked, 0.7s Time] [2024-11-17 00:45:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-17 00:45:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-17 00:45:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 101 states have (on average 1.8514851485148516) internal successors, (187), 174 states have internal predecessors, (187), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2024-11-17 00:45:41,598 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 27 [2024-11-17 00:45:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:41,598 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2024-11-17 00:45:41,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 00:45:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2024-11-17 00:45:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-17 00:45:41,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:41,599 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:41,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 00:45:41,803 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 [2024-11-17 00:45:41,804 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:41,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1140405798, now seen corresponding path program 1 times [2024-11-17 00:45:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287421352] [2024-11-17 00:45:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:41,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:41,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287421352] [2024-11-17 00:45:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287421352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280712421] [2024-11-17 00:45:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:41,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:41,953 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) [2024-11-17 00:45:41,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 00:45:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:42,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 00:45:42,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:42,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280712421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 00:45:42,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 00:45:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-11-17 00:45:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626264357] [2024-11-17 00:45:42,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:42,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:42,159 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-17 00:45:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:42,355 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2024-11-17 00:45:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:42,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-17 00:45:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:42,357 INFO L225 Difference]: With dead ends: 180 [2024-11-17 00:45:42,357 INFO L226 Difference]: Without dead ends: 180 [2024-11-17 00:45:42,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:42,358 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 1 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:42,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 930 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-17 00:45:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-17 00:45:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 101 states have (on average 1.8415841584158417) internal successors, (186), 174 states have internal predecessors, (186), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2024-11-17 00:45:42,364 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 30 [2024-11-17 00:45:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:42,365 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2024-11-17 00:45:42,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-17 00:45:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2024-11-17 00:45:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-17 00:45:42,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:42,366 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:42,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 00:45:42,567 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 [2024-11-17 00:45:42,567 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:42,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash 964750959, now seen corresponding path program 1 times [2024-11-17 00:45:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:42,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750264258] [2024-11-17 00:45:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:42,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:42,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 00:45:42,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:42,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750264258] [2024-11-17 00:45:42,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750264258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:42,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598833824] [2024-11-17 00:45:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:42,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:42,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:42,695 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) [2024-11-17 00:45:42,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 00:45:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:42,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 00:45:42,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:42,840 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 [2024-11-17 00:45:42,902 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-17 00:45:42,951 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 00:45:42,952 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 [2024-11-17 00:45:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 7 not checked. [2024-11-17 00:45:42,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:43,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598833824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:43,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:45:43,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2024-11-17 00:45:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010066576] [2024-11-17 00:45:43,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:43,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 00:45:43,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 00:45:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=89, Unknown=1, NotChecked=18, Total=132 [2024-11-17 00:45:43,015 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 00:45:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:43,467 INFO L93 Difference]: Finished difference Result 179 states and 193 transitions. [2024-11-17 00:45:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 00:45:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-17 00:45:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:43,469 INFO L225 Difference]: With dead ends: 179 [2024-11-17 00:45:43,469 INFO L226 Difference]: Without dead ends: 179 [2024-11-17 00:45:43,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2024-11-17 00:45:43,470 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 9 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:43,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 788 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 661 Invalid, 0 Unknown, 186 Unchecked, 0.4s Time] [2024-11-17 00:45:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-17 00:45:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-17 00:45:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 101 states have (on average 1.8316831683168318) internal successors, (185), 173 states have internal predecessors, (185), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2024-11-17 00:45:43,475 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 31 [2024-11-17 00:45:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:43,476 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2024-11-17 00:45:43,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-17 00:45:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2024-11-17 00:45:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-17 00:45:43,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:43,477 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:43,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 00:45:43,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:43,678 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:43,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 964750960, now seen corresponding path program 1 times [2024-11-17 00:45:43,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:43,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478777647] [2024-11-17 00:45:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:43,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:43,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478777647] [2024-11-17 00:45:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478777647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111886224] [2024-11-17 00:45:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:43,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:43,911 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) [2024-11-17 00:45:43,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 00:45:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:44,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 00:45:44,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:44,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:44,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:45:44,209 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 19 treesize of output 23 [2024-11-17 00:45:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:44,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111886224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 00:45:44,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 00:45:44,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2024-11-17 00:45:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138098173] [2024-11-17 00:45:44,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:44,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 00:45:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 00:45:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-17 00:45:44,339 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-17 00:45:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:44,686 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2024-11-17 00:45:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 00:45:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-11-17 00:45:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:44,691 INFO L225 Difference]: With dead ends: 187 [2024-11-17 00:45:44,691 INFO L226 Difference]: Without dead ends: 187 [2024-11-17 00:45:44,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-17 00:45:44,692 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 9 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:44,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1755 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-17 00:45:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-17 00:45:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2024-11-17 00:45:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 105 states have (on average 1.8095238095238095) internal successors, (190), 177 states have internal predecessors, (190), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2024-11-17 00:45:44,699 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 31 [2024-11-17 00:45:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:44,699 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2024-11-17 00:45:44,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-17 00:45:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2024-11-17 00:45:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-17 00:45:44,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:44,705 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:44,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 00:45:44,905 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,SelfDestructingSolverStorable9 [2024-11-17 00:45:44,906 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:44,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash -157491200, now seen corresponding path program 1 times [2024-11-17 00:45:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:44,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665698783] [2024-11-17 00:45:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:45:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665698783] [2024-11-17 00:45:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665698783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:45,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:45,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-17 00:45:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426713570] [2024-11-17 00:45:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:45,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 00:45:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 00:45:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-17 00:45:45,057 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2024-11-17 00:45:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:45,417 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2024-11-17 00:45:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 00:45:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 32 [2024-11-17 00:45:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:45,419 INFO L225 Difference]: With dead ends: 182 [2024-11-17 00:45:45,419 INFO L226 Difference]: Without dead ends: 182 [2024-11-17 00:45:45,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-17 00:45:45,420 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 7 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:45,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 711 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-17 00:45:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-17 00:45:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-11-17 00:45:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 105 states have (on average 1.8) internal successors, (189), 176 states have internal predecessors, (189), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2024-11-17 00:45:45,427 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 32 [2024-11-17 00:45:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:45,428 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2024-11-17 00:45:45,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2024-11-17 00:45:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2024-11-17 00:45:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-17 00:45:45,429 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:45,429 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:45,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 00:45:45,430 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr69REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:45,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash -157491199, now seen corresponding path program 1 times [2024-11-17 00:45:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:45,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434228309] [2024-11-17 00:45:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:45:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:45,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434228309] [2024-11-17 00:45:45,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434228309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:45,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:45,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-17 00:45:45,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293604406] [2024-11-17 00:45:45,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:45,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 00:45:45,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 00:45:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-17 00:45:45,660 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2024-11-17 00:45:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:46,030 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2024-11-17 00:45:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 00:45:46,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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 32 [2024-11-17 00:45:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:46,031 INFO L225 Difference]: With dead ends: 181 [2024-11-17 00:45:46,032 INFO L226 Difference]: Without dead ends: 181 [2024-11-17 00:45:46,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-17 00:45:46,033 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 6 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:46,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 746 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-17 00:45:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-17 00:45:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-17 00:45:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 105 states have (on average 1.7904761904761906) internal successors, (188), 175 states have internal predecessors, (188), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-17 00:45:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2024-11-17 00:45:46,038 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 32 [2024-11-17 00:45:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:46,038 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2024-11-17 00:45:46,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2024-11-17 00:45:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2024-11-17 00:45:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-17 00:45:46,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:46,040 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:46,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 00:45:46,040 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr72REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:46,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2121858383, now seen corresponding path program 1 times [2024-11-17 00:45:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818051570] [2024-11-17 00:45:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-17 00:45:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-17 00:45:46,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818051570] [2024-11-17 00:45:46,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818051570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578553544] [2024-11-17 00:45:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:46,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:46,200 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) [2024-11-17 00:45:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 00:45:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 00:45:46,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 00:45:46,411 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 00:45:46,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578553544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:46,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 00:45:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-17 00:45:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228122527] [2024-11-17 00:45:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:46,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 00:45:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 00:45:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-17 00:45:46,413 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:46,428 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2024-11-17 00:45:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 00:45:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-17 00:45:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:46,430 INFO L225 Difference]: With dead ends: 169 [2024-11-17 00:45:46,430 INFO L226 Difference]: Without dead ends: 169 [2024-11-17 00:45:46,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-17 00:45:46,431 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 0 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:46,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 349 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-17 00:45:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-17 00:45:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-17 00:45:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 97 states have (on average 1.7938144329896908) internal successors, (174), 164 states have internal predecessors, (174), 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) [2024-11-17 00:45:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2024-11-17 00:45:46,436 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 43 [2024-11-17 00:45:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:46,437 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2024-11-17 00:45:46,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2024-11-17 00:45:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-17 00:45:46,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:46,437 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:46,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 00:45:46,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:46,638 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:46,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1327685014, now seen corresponding path program 1 times [2024-11-17 00:45:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:46,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400294745] [2024-11-17 00:45:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:46,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:46,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:47,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:47,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 00:45:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400294745] [2024-11-17 00:45:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400294745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:47,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678271369] [2024-11-17 00:45:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:47,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:47,181 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) [2024-11-17 00:45:47,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 00:45:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:47,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 00:45:47,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:47,387 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 [2024-11-17 00:45:47,396 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 [2024-11-17 00:45:47,414 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 [2024-11-17 00:45:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:47,453 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 [2024-11-17 00:45:47,467 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 [2024-11-17 00:45:47,490 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 00:45:47,490 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 [2024-11-17 00:45:47,540 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 00:45:47,540 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 [2024-11-17 00:45:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 14 not checked. [2024-11-17 00:45:47,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678271369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:47,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:45:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2024-11-17 00:45:47,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163218837] [2024-11-17 00:45:47,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:47,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 00:45:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 00:45:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=121, Unknown=2, NotChecked=46, Total=210 [2024-11-17 00:45:47,816 INFO L87 Difference]: Start difference. First operand 169 states and 180 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-17 00:45:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:48,267 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2024-11-17 00:45:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2024-11-17 00:45:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:48,268 INFO L225 Difference]: With dead ends: 180 [2024-11-17 00:45:48,269 INFO L226 Difference]: Without dead ends: 180 [2024-11-17 00:45:48,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=186, Unknown=2, NotChecked=58, Total=306 [2024-11-17 00:45:48,269 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 194 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:48,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 391 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 459 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2024-11-17 00:45:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-17 00:45:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 158. [2024-11-17 00:45:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 97 states have (on average 1.6804123711340206) internal successors, (163), 153 states have internal predecessors, (163), 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) [2024-11-17 00:45:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2024-11-17 00:45:48,274 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 45 [2024-11-17 00:45:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:48,274 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2024-11-17 00:45:48,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-17 00:45:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2024-11-17 00:45:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-17 00:45:48,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:48,276 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:48,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 00:45:48,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:48,477 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:48,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1327685015, now seen corresponding path program 1 times [2024-11-17 00:45:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:48,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37571028] [2024-11-17 00:45:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:48,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:48,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:49,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-17 00:45:49,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37571028] [2024-11-17 00:45:49,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37571028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906002555] [2024-11-17 00:45:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:49,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:49,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:49,129 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) [2024-11-17 00:45:49,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 00:45:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:49,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 00:45:49,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:49,357 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 [2024-11-17 00:45:49,368 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 [2024-11-17 00:45:49,386 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 [2024-11-17 00:45:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:49,435 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 [2024-11-17 00:45:49,464 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 [2024-11-17 00:45:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:49,508 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 [2024-11-17 00:45:49,575 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 [2024-11-17 00:45:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:49,616 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 [2024-11-17 00:45:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:49,623 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 00:45:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906002555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:49,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 00:45:49,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2024-11-17 00:45:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077777509] [2024-11-17 00:45:49,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:49,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2024-11-17 00:45:49,624 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 7 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:49,807 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2024-11-17 00:45:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-17 00:45:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:49,808 INFO L225 Difference]: With dead ends: 152 [2024-11-17 00:45:49,808 INFO L226 Difference]: Without dead ends: 152 [2024-11-17 00:45:49,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-17 00:45:49,809 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 53 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:49,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 370 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2024-11-17 00:45:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-17 00:45:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2024-11-17 00:45:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 97 states have (on average 1.6082474226804124) internal successors, (156), 146 states have internal predecessors, (156), 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) [2024-11-17 00:45:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2024-11-17 00:45:49,813 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 45 [2024-11-17 00:45:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:49,814 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2024-11-17 00:45:49,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2024-11-17 00:45:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-17 00:45:49,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:49,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:49,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 00:45:50,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 00:45:50,015 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:50,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash 552406062, now seen corresponding path program 1 times [2024-11-17 00:45:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:50,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195311884] [2024-11-17 00:45:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:50,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:50,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:50,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-17 00:45:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195311884] [2024-11-17 00:45:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195311884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381217206] [2024-11-17 00:45:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:50,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:50,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:45:50,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 00:45:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:51,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-17 00:45:51,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:51,488 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 [2024-11-17 00:45:51,510 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-17 00:45:51,552 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-17 00:45:51,553 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 23 treesize of output 24 [2024-11-17 00:45:51,561 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 17 treesize of output 9 [2024-11-17 00:45:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 00:45:51,568 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 00:45:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381217206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:51,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 00:45:51,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 19 [2024-11-17 00:45:51,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751350422] [2024-11-17 00:45:51,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:51,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 00:45:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:51,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 00:45:51,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=299, Unknown=1, NotChecked=34, Total=380 [2024-11-17 00:45:51,570 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:51,885 INFO L93 Difference]: Finished difference Result 196 states and 212 transitions. [2024-11-17 00:45:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 00:45:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-11-17 00:45:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:51,887 INFO L225 Difference]: With dead ends: 196 [2024-11-17 00:45:51,887 INFO L226 Difference]: Without dead ends: 196 [2024-11-17 00:45:51,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=404, Unknown=1, NotChecked=40, Total=506 [2024-11-17 00:45:51,888 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 142 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:51,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 598 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 417 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2024-11-17 00:45:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-17 00:45:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 159. [2024-11-17 00:45:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.6571428571428573) internal successors, (174), 154 states have internal predecessors, (174), 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) [2024-11-17 00:45:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2024-11-17 00:45:51,895 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 49 [2024-11-17 00:45:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:51,895 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2024-11-17 00:45:51,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2024-11-17 00:45:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-17 00:45:51,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:51,896 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:51,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 00:45:52,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 00:45:52,101 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:52,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 552406063, now seen corresponding path program 1 times [2024-11-17 00:45:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958515457] [2024-11-17 00:45:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:52,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:52,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:52,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:45:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958515457] [2024-11-17 00:45:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958515457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987699154] [2024-11-17 00:45:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:52,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:45:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 00:45:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:53,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-17 00:45:53,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:53,230 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 [2024-11-17 00:45:53,237 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 [2024-11-17 00:45:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:45:53,517 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 12 treesize of output 14 [2024-11-17 00:45:53,537 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-17 00:45:53,537 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 17 treesize of output 21 [2024-11-17 00:45:53,985 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 [2024-11-17 00:45:53,989 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 [2024-11-17 00:45:54,025 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_dll_circular_insert_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_dll_circular_insert_~head#1.base_BEFORE_CALL_5|) 0) 0))) is different from true [2024-11-17 00:45:54,087 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-17 00:45:54,087 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 20 treesize of output 22 [2024-11-17 00:45:54,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-17 00:45:54,161 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 25 treesize of output 13 [2024-11-17 00:45:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2024-11-17 00:45:54,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:45:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987699154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:54,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:45:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 31 [2024-11-17 00:45:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815250515] [2024-11-17 00:45:54,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:45:54,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-17 00:45:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-17 00:45:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2024-11-17 00:45:54,432 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 32 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 00:45:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:55,812 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2024-11-17 00:45:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 00:45:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2024-11-17 00:45:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:55,814 INFO L225 Difference]: With dead ends: 204 [2024-11-17 00:45:55,814 INFO L226 Difference]: Without dead ends: 204 [2024-11-17 00:45:55,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1553, Unknown=1, NotChecked=80, Total=1806 [2024-11-17 00:45:55,815 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 286 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:55,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1240 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1840 Invalid, 0 Unknown, 210 Unchecked, 1.1s Time] [2024-11-17 00:45:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-17 00:45:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2024-11-17 00:45:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 112 states have (on average 1.5982142857142858) internal successors, (179), 161 states have internal predecessors, (179), 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) [2024-11-17 00:45:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 185 transitions. [2024-11-17 00:45:55,819 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 185 transitions. Word has length 49 [2024-11-17 00:45:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:55,820 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 185 transitions. [2024-11-17 00:45:55,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-17 00:45:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 185 transitions. [2024-11-17 00:45:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-17 00:45:55,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:55,820 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:55,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 00:45:56,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 00:45:56,023 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:56,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash -55283200, now seen corresponding path program 1 times [2024-11-17 00:45:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:56,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049754982] [2024-11-17 00:45:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:56,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:56,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049754982] [2024-11-17 00:45:56,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049754982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:56,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 00:45:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693691021] [2024-11-17 00:45:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:56,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 00:45:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 00:45:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 00:45:56,110 INFO L87 Difference]: Start difference. First operand 167 states and 185 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:56,226 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2024-11-17 00:45:56,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 00:45:56,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-17 00:45:56,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:56,227 INFO L225 Difference]: With dead ends: 163 [2024-11-17 00:45:56,227 INFO L226 Difference]: Without dead ends: 163 [2024-11-17 00:45:56,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 00:45:56,229 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 0 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:56,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-17 00:45:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-17 00:45:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-17 00:45:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 108 states have (on average 1.5555555555555556) internal successors, (168), 157 states have internal predecessors, (168), 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) [2024-11-17 00:45:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2024-11-17 00:45:56,235 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 50 [2024-11-17 00:45:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:56,235 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2024-11-17 00:45:56,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2024-11-17 00:45:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-17 00:45:56,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:56,236 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:56,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 00:45:56,236 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:56,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1587473722, now seen corresponding path program 1 times [2024-11-17 00:45:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992969090] [2024-11-17 00:45:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-17 00:45:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992969090] [2024-11-17 00:45:56,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992969090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:56,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:56,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 00:45:56,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009459531] [2024-11-17 00:45:56,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:56,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:56,381 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:56,640 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2024-11-17 00:45:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-17 00:45:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:56,641 INFO L225 Difference]: With dead ends: 157 [2024-11-17 00:45:56,641 INFO L226 Difference]: Without dead ends: 157 [2024-11-17 00:45:56,641 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 [2024-11-17 00:45:56,642 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 33 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:56,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 486 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:56,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-17 00:45:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-17 00:45:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.5) internal successors, (162), 151 states have internal predecessors, (162), 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) [2024-11-17 00:45:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2024-11-17 00:45:56,645 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 52 [2024-11-17 00:45:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:56,646 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2024-11-17 00:45:56,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2024-11-17 00:45:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-17 00:45:56,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:56,646 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:56,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 00:45:56,647 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:56,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1587473721, now seen corresponding path program 1 times [2024-11-17 00:45:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:56,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793848938] [2024-11-17 00:45:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 00:45:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793848938] [2024-11-17 00:45:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793848938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566481855] [2024-11-17 00:45:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:56,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:56,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:45:56,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 00:45:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 00:45:57,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:57,223 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 00:45:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566481855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:57,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 00:45:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2024-11-17 00:45:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31163123] [2024-11-17 00:45:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:57,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 00:45:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 00:45:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-17 00:45:57,225 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:57,255 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2024-11-17 00:45:57,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 00:45:57,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-11-17 00:45:57,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:57,256 INFO L225 Difference]: With dead ends: 160 [2024-11-17 00:45:57,256 INFO L226 Difference]: Without dead ends: 160 [2024-11-17 00:45:57,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-17 00:45:57,257 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 99 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:57,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 338 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-17 00:45:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-17 00:45:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2024-11-17 00:45:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 150 states have internal predecessors, (160), 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) [2024-11-17 00:45:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2024-11-17 00:45:57,261 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 52 [2024-11-17 00:45:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:57,261 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2024-11-17 00:45:57,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2024-11-17 00:45:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-17 00:45:57,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:57,262 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:57,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 00:45:57,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:57,462 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:57,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1907776752, now seen corresponding path program 1 times [2024-11-17 00:45:57,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:57,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871298667] [2024-11-17 00:45:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:57,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-17 00:45:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:57,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871298667] [2024-11-17 00:45:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871298667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:45:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630182868] [2024-11-17 00:45:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:57,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:45:57,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:45:57,706 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:45:57,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 00:45:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:57,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 00:45:57,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:45:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:58,017 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 00:45:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630182868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:58,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 00:45:58,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2024-11-17 00:45:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408751875] [2024-11-17 00:45:58,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:58,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 00:45:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 00:45:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:58,019 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:58,048 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2024-11-17 00:45:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 00:45:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-11-17 00:45:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:58,050 INFO L225 Difference]: With dead ends: 157 [2024-11-17 00:45:58,050 INFO L226 Difference]: Without dead ends: 157 [2024-11-17 00:45:58,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-17 00:45:58,050 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 91 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:58,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 480 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-17 00:45:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-17 00:45:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2024-11-17 00:45:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 106 states have (on average 1.471698113207547) internal successors, (156), 147 states have internal predecessors, (156), 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) [2024-11-17 00:45:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2024-11-17 00:45:58,055 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 53 [2024-11-17 00:45:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:58,055 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2024-11-17 00:45:58,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:45:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2024-11-17 00:45:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-17 00:45:58,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:58,056 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:58,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 00:45:58,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 00:45:58,257 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:58,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 988460894, now seen corresponding path program 1 times [2024-11-17 00:45:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633605254] [2024-11-17 00:45:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:58,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633605254] [2024-11-17 00:45:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633605254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:58,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:58,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 00:45:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69828704] [2024-11-17 00:45:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:58,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 00:45:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 00:45:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 00:45:58,361 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:58,510 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2024-11-17 00:45:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 00:45:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-17 00:45:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:58,513 INFO L225 Difference]: With dead ends: 152 [2024-11-17 00:45:58,513 INFO L226 Difference]: Without dead ends: 152 [2024-11-17 00:45:58,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 00:45:58,514 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:58,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 380 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-17 00:45:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-17 00:45:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-17 00:45:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 146 states have internal predecessors, (155), 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) [2024-11-17 00:45:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2024-11-17 00:45:58,521 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 54 [2024-11-17 00:45:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:58,521 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2024-11-17 00:45:58,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2024-11-17 00:45:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-17 00:45:58,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:58,525 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:58,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-17 00:45:58,525 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:58,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash 988460895, now seen corresponding path program 1 times [2024-11-17 00:45:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:58,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378445044] [2024-11-17 00:45:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:58,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:45:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378445044] [2024-11-17 00:45:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378445044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 00:45:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716470703] [2024-11-17 00:45:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:58,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 00:45:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 00:45:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 00:45:58,688 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:58,905 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2024-11-17 00:45:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 00:45:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-17 00:45:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:58,907 INFO L225 Difference]: With dead ends: 151 [2024-11-17 00:45:58,907 INFO L226 Difference]: Without dead ends: 151 [2024-11-17 00:45:58,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 00:45:58,907 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 2 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:58,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 376 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-17 00:45:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-17 00:45:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 145 states have internal predecessors, (154), 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) [2024-11-17 00:45:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2024-11-17 00:45:58,911 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 54 [2024-11-17 00:45:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:58,911 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2024-11-17 00:45:58,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2024-11-17 00:45:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-17 00:45:58,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:58,912 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:58,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-17 00:45:58,912 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:58,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 577516717, now seen corresponding path program 1 times [2024-11-17 00:45:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943291947] [2024-11-17 00:45:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:59,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:45:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:59,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:45:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:59,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:45:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:45:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 00:45:59,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:45:59,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943291947] [2024-11-17 00:45:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943291947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:45:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:45:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 00:45:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412392073] [2024-11-17 00:45:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:45:59,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:45:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:45:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:45:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:45:59,143 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:45:59,329 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2024-11-17 00:45:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:45:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2024-11-17 00:45:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:45:59,331 INFO L225 Difference]: With dead ends: 145 [2024-11-17 00:45:59,332 INFO L226 Difference]: Without dead ends: 145 [2024-11-17 00:45:59,332 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 [2024-11-17 00:45:59,332 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 26 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:45:59,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 494 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-17 00:45:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-17 00:45:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-11-17 00:45:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 106 states have (on average 1.3962264150943395) internal successors, (148), 139 states have internal predecessors, (148), 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) [2024-11-17 00:45:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2024-11-17 00:45:59,339 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 55 [2024-11-17 00:45:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:45:59,339 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2024-11-17 00:45:59,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-17 00:45:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2024-11-17 00:45:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-17 00:45:59,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:45:59,340 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:45:59,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-17 00:45:59,340 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:45:59,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:45:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 942785161, now seen corresponding path program 1 times [2024-11-17 00:45:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:45:59,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074384528] [2024-11-17 00:45:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:45:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:45:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:00,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:00,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:00,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:00,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074384528] [2024-11-17 00:46:00,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074384528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:00,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239294092] [2024-11-17 00:46:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:00,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:46:00,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:46:00,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 00:46:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:01,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-17 00:46:01,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:46:01,166 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 [2024-11-17 00:46:01,367 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 00:46:01,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 00:46:01,471 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 11 treesize of output 7 [2024-11-17 00:46:01,545 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-17 00:46:01,546 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-11-17 00:46:01,700 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-17 00:46:01,701 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 33 treesize of output 24 [2024-11-17 00:46:01,721 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 33 treesize of output 24 [2024-11-17 00:46:01,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 17 [2024-11-17 00:46:01,941 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 [2024-11-17 00:46:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:46:02,187 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 34 [2024-11-17 00:46:02,230 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2024-11-17 00:46:02,231 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 [2024-11-17 00:46:02,412 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 85 treesize of output 49 [2024-11-17 00:46:02,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2024-11-17 00:46:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:46:02,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:46:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239294092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:03,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:46:03,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 50 [2024-11-17 00:46:03,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990019158] [2024-11-17 00:46:03,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:46:03,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-17 00:46:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-17 00:46:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3223, Unknown=0, NotChecked=0, Total=3422 [2024-11-17 00:46:03,359 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 51 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 43 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-17 00:46:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:46:05,827 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2024-11-17 00:46:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-17 00:46:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 43 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-11-17 00:46:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:46:05,829 INFO L225 Difference]: With dead ends: 150 [2024-11-17 00:46:05,829 INFO L226 Difference]: Without dead ends: 150 [2024-11-17 00:46:05,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=446, Invalid=6360, Unknown=0, NotChecked=0, Total=6806 [2024-11-17 00:46:05,831 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 161 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-17 00:46:05,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1900 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-17 00:46:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-17 00:46:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2024-11-17 00:46:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.3867924528301887) internal successors, (147), 138 states have internal predecessors, (147), 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) [2024-11-17 00:46:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2024-11-17 00:46:05,839 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 57 [2024-11-17 00:46:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:46:05,839 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2024-11-17 00:46:05,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 43 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-17 00:46:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2024-11-17 00:46:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-17 00:46:05,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:46:05,840 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:46:05,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 00:46:06,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-17 00:46:06,041 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:46:06,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:46:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 942785162, now seen corresponding path program 1 times [2024-11-17 00:46:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:46:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027436261] [2024-11-17 00:46:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:06,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:46:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:07,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:07,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:07,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:08,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:08,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027436261] [2024-11-17 00:46:08,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027436261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:08,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447105683] [2024-11-17 00:46:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:46:08,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:46:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 00:46:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:08,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-17 00:46:08,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:46:08,503 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 [2024-11-17 00:46:08,506 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 [2024-11-17 00:46:08,782 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 00:46:08,782 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 [2024-11-17 00:46:08,793 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 00:46:08,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 00:46:08,889 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 11 treesize of output 7 [2024-11-17 00:46:08,895 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 11 treesize of output 7 [2024-11-17 00:46:08,973 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 16 treesize of output 11 [2024-11-17 00:46:08,984 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 16 treesize of output 11 [2024-11-17 00:46:09,115 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 16 treesize of output 11 [2024-11-17 00:46:09,125 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 16 treesize of output 11 [2024-11-17 00:46:09,147 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 23 treesize of output 11 [2024-11-17 00:46:09,157 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 33 treesize of output 24 [2024-11-17 00:46:09,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 17 [2024-11-17 00:46:09,364 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 [2024-11-17 00:46:09,369 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 [2024-11-17 00:46:09,372 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 [2024-11-17 00:46:09,692 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-17 00:46:09,693 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 [2024-11-17 00:46:09,713 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-17 00:46:09,713 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 57 treesize of output 42 [2024-11-17 00:46:09,726 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2024-11-17 00:46:09,726 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 1 case distinctions, treesize of input 14 treesize of output 16 [2024-11-17 00:46:09,735 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 25 treesize of output 17 [2024-11-17 00:46:09,762 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-17 00:46:09,763 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 [2024-11-17 00:46:09,962 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 75 treesize of output 43 [2024-11-17 00:46:09,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:09,970 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 18 [2024-11-17 00:46:10,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:10,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-17 00:46:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 00:46:10,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:10,253 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 36 treesize of output 24 [2024-11-17 00:46:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 00:46:10,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:46:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447105683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:11,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:46:11,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 51 [2024-11-17 00:46:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399729637] [2024-11-17 00:46:11,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:46:11,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-17 00:46:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-17 00:46:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2024-11-17 00:46:11,442 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand has 52 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 44 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-17 00:46:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:46:15,452 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2024-11-17 00:46:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-17 00:46:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 44 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-11-17 00:46:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:46:15,454 INFO L225 Difference]: With dead ends: 148 [2024-11-17 00:46:15,454 INFO L226 Difference]: Without dead ends: 148 [2024-11-17 00:46:15,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=390, Invalid=6750, Unknown=0, NotChecked=0, Total=7140 [2024-11-17 00:46:15,456 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 129 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-17 00:46:15,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 2429 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-17 00:46:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-17 00:46:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2024-11-17 00:46:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 137 states have internal predecessors, (146), 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) [2024-11-17 00:46:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2024-11-17 00:46:15,460 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 57 [2024-11-17 00:46:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:46:15,460 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2024-11-17 00:46:15,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 44 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-17 00:46:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2024-11-17 00:46:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-17 00:46:15,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:46:15,461 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:46:15,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 00:46:15,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:15,662 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:46:15,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:46:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -221557593, now seen corresponding path program 1 times [2024-11-17 00:46:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:46:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817802681] [2024-11-17 00:46:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:46:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:15,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:15,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:15,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-17 00:46:15,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:15,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817802681] [2024-11-17 00:46:15,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817802681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 00:46:15,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 00:46:15,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 00:46:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567657638] [2024-11-17 00:46:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 00:46:15,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 00:46:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 00:46:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-17 00:46:15,901 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:46:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:46:16,029 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2024-11-17 00:46:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 00:46:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-11-17 00:46:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:46:16,030 INFO L225 Difference]: With dead ends: 140 [2024-11-17 00:46:16,030 INFO L226 Difference]: Without dead ends: 140 [2024-11-17 00:46:16,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-17 00:46:16,031 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-17 00:46:16,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 393 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-17 00:46:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-17 00:46:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2024-11-17 00:46:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 106 states have (on average 1.3396226415094339) internal successors, (142), 133 states have internal predecessors, (142), 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) [2024-11-17 00:46:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2024-11-17 00:46:16,034 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 59 [2024-11-17 00:46:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:46:16,035 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2024-11-17 00:46:16,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-17 00:46:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2024-11-17 00:46:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-17 00:46:16,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:46:16,036 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:46:16,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-17 00:46:16,036 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:46:16,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:46:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 942513590, now seen corresponding path program 1 times [2024-11-17 00:46:16,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:46:16,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140477006] [2024-11-17 00:46:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:16,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:46:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:16,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:16,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:16,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-17 00:46:16,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140477006] [2024-11-17 00:46:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140477006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:16,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362833783] [2024-11-17 00:46:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:46:16,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:46:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 00:46:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:16,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 00:46:16,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:46:16,627 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 [2024-11-17 00:46:16,715 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 [2024-11-17 00:46:16,786 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-17 00:46:16,786 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 [2024-11-17 00:46:16,879 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 17 treesize of output 9 [2024-11-17 00:46:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:16,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:46:17,183 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 18 treesize of output 10 [2024-11-17 00:46:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362833783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 00:46:17,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 00:46:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 24 [2024-11-17 00:46:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117945008] [2024-11-17 00:46:17,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 00:46:17,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-17 00:46:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-17 00:46:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-11-17 00:46:17,222 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 25 states, 24 states have (on average 4.0) internal successors, (96), 19 states have internal predecessors, (96), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-17 00:46:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:46:17,833 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2024-11-17 00:46:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 00:46:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.0) internal successors, (96), 19 states have internal predecessors, (96), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2024-11-17 00:46:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:46:17,834 INFO L225 Difference]: With dead ends: 182 [2024-11-17 00:46:17,834 INFO L226 Difference]: Without dead ends: 182 [2024-11-17 00:46:17,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-11-17 00:46:17,835 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 341 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-17 00:46:17,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1149 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-17 00:46:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-17 00:46:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2024-11-17 00:46:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 135 states have internal predecessors, (145), 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) [2024-11-17 00:46:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2024-11-17 00:46:17,839 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 62 [2024-11-17 00:46:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:46:17,839 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2024-11-17 00:46:17,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.0) internal successors, (96), 19 states have internal predecessors, (96), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-17 00:46:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2024-11-17 00:46:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-17 00:46:17,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:46:17,840 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:46:17,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 00:46:18,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-17 00:46:18,041 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:46:18,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:46:18,042 INFO L85 PathProgramCache]: Analyzing trace with hash 942513591, now seen corresponding path program 1 times [2024-11-17 00:46:18,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:46:18,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493900926] [2024-11-17 00:46:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:46:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:18,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:18,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:18,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:18,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:18,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493900926] [2024-11-17 00:46:18,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493900926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:18,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576366145] [2024-11-17 00:46:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:18,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:18,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:46:18,874 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:46:18,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 00:46:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:19,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-17 00:46:19,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:46:19,229 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 [2024-11-17 00:46:19,491 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 [2024-11-17 00:46:19,495 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 [2024-11-17 00:46:19,701 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-17 00:46:19,701 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 [2024-11-17 00:46:19,715 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 18 treesize of output 13 [2024-11-17 00:46:19,988 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 17 treesize of output 9 [2024-11-17 00:46:19,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:19,999 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 40 treesize of output 32 [2024-11-17 00:46:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 00:46:20,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:46:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576366145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:20,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-17 00:46:20,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2024-11-17 00:46:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185394886] [2024-11-17 00:46:20,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-17 00:46:20,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 00:46:20,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 00:46:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2024-11-17 00:46:20,402 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-17 00:46:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-17 00:46:21,675 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2024-11-17 00:46:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-17 00:46:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2024-11-17 00:46:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-17 00:46:21,676 INFO L225 Difference]: With dead ends: 180 [2024-11-17 00:46:21,676 INFO L226 Difference]: Without dead ends: 180 [2024-11-17 00:46:21,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-11-17 00:46:21,678 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 264 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-17 00:46:21,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1441 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-17 00:46:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-17 00:46:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 143. [2024-11-17 00:46:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 137 states have internal predecessors, (147), 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) [2024-11-17 00:46:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2024-11-17 00:46:21,682 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 62 [2024-11-17 00:46:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-17 00:46:21,682 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2024-11-17 00:46:21,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-17 00:46:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2024-11-17 00:46:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-17 00:46:21,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-17 00:46:21,683 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 00:46:21,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-17 00:46:21,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-17 00:46:21,884 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 79 more)] === [2024-11-17 00:46:21,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 00:46:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash -86370405, now seen corresponding path program 1 times [2024-11-17 00:46:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 00:46:21,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054374512] [2024-11-17 00:46:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 00:46:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:22,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-17 00:46:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:22,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-17 00:46:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:22,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-17 00:46:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 00:46:22,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 00:46:22,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054374512] [2024-11-17 00:46:22,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054374512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 00:46:22,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180885636] [2024-11-17 00:46:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 00:46:22,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 00:46:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 00:46:22,222 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 00:46:22,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 00:46:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 00:46:22,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-17 00:46:22,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 00:46:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 00:46:22,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:22,820 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 16 treesize of output 11 [2024-11-17 00:46:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-17 00:46:22,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 00:46:22,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 00:46:22,923 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 17 [2024-11-17 00:46:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 00:46:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180885636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 00:46:23,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 00:46:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2024-11-17 00:46:23,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880085467] [2024-11-17 00:46:23,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 00:46:23,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 00:46:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 00:46:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 00:46:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2024-11-17 00:46:23,079 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 24 states have internal predecessors, (97), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-17 00:46:27,107 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] [2024-11-17 00:46:31,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-17 00:46:35,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-17 00:46:39,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-17 00:46:43,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-17 00:46:47,211 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]