/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 03:00:51,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 03:00:51,249 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 03:00:51,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 03:00:51,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 03:00:51,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 03:00:51,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 03:00:51,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 03:00:51,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 03:00:51,286 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 03:00:51,286 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 03:00:51,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 03:00:51,286 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 03:00:51,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 03:00:51,287 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 03:00:51,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 03:00:51,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 03:00:51,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 03:00:51,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 03:00:51,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 03:00:51,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 03:00:51,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 03:00:51,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 03:00:51,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 03:00:51,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 03:00:51,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 03:00:51,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:00:51,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 03:00:51,290 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 03:00:51,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 03:00:51,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 03:00:51,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 03:00:51,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 03:00:51,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 03:00:51,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 03:00:51,504 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 03:00:51,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-21 03:00:52,542 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 03:00:52,768 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 03:00:52,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-21 03:00:52,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e624d214/e3f945fcc5064075b2e42055332d3e05/FLAG42d989d4b [2023-12-21 03:00:52,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e624d214/e3f945fcc5064075b2e42055332d3e05 [2023-12-21 03:00:52,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 03:00:52,795 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 03:00:52,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 03:00:52,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 03:00:52,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 03:00:52,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:00:52" (1/1) ... [2023-12-21 03:00:52,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@566371dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:52, skipping insertion in model container [2023-12-21 03:00:52,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:00:52" (1/1) ... [2023-12-21 03:00:52,843 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 03:00:53,025 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-12-21 03:00:53,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:00:53,072 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 03:00:53,095 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-12-21 03:00:53,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:00:53,127 INFO L206 MainTranslator]: Completed translation [2023-12-21 03:00:53,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53 WrapperNode [2023-12-21 03:00:53,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 03:00:53,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 03:00:53,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 03:00:53,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 03:00:53,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,143 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,161 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 207 [2023-12-21 03:00:53,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 03:00:53,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 03:00:53,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 03:00:53,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 03:00:53,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,175 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,194 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 8, 8, 18, 6]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 0, 1]. The 10 writes are split as follows [0, 1, 1, 7, 1]. [2023-12-21 03:00:53,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 03:00:53,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 03:00:53,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 03:00:53,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 03:00:53,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (1/1) ... [2023-12-21 03:00:53,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:00:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:00:53,245 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) [2023-12-21 03:00:53,250 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 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-12-21 03:00:53,266 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-12-21 03:00:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-12-21 03:00:53,267 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-12-21 03:00:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-12-21 03:00:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-12-21 03:00:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-12-21 03:00:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 03:00:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 03:00:53,374 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 03:00:53,376 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 03:00:53,604 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 03:00:53,642 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 03:00:53,642 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-12-21 03:00:53,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:00:53 BoogieIcfgContainer [2023-12-21 03:00:53,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 03:00:53,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 03:00:53,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 03:00:53,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 03:00:53,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:00:52" (1/3) ... [2023-12-21 03:00:53,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7d3909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:00:53, skipping insertion in model container [2023-12-21 03:00:53,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:00:53" (2/3) ... [2023-12-21 03:00:53,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7d3909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:00:53, skipping insertion in model container [2023-12-21 03:00:53,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:00:53" (3/3) ... [2023-12-21 03:00:53,649 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-12-21 03:00:53,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 03:00:53,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 03:00:53,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 03:00:53,702 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@10b3877f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 03:00:53,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 03:00:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 76 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 03:00:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 03:00:53,711 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:00:53,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:00:53,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:00:53,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:00:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1056251351, now seen corresponding path program 1 times [2023-12-21 03:00:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:00:53,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346294458] [2023-12-21 03:00:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:00:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:00:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:00:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:00:53,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346294458] [2023-12-21 03:00:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346294458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:00:53,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:00:53,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 03:00:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482542343] [2023-12-21 03:00:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:00:53,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 03:00:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:00:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 03:00:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:00:53,936 INFO L87 Difference]: Start difference. First operand has 90 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 76 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:00:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:00:53,990 INFO L93 Difference]: Finished difference Result 177 states and 315 transitions. [2023-12-21 03:00:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 03:00:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 03:00:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:00:53,999 INFO L225 Difference]: With dead ends: 177 [2023-12-21 03:00:54,000 INFO L226 Difference]: Without dead ends: 84 [2023-12-21 03:00:54,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:00:54,009 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:00:54,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:00:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-21 03:00:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-21 03:00:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:00:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-12-21 03:00:54,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 14 [2023-12-21 03:00:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:00:54,055 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-12-21 03:00:54,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:00:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-12-21 03:00:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 03:00:54,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:00:54,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:00:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 03:00:54,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:00:54,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:00:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1538349061, now seen corresponding path program 1 times [2023-12-21 03:00:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:00:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787093324] [2023-12-21 03:00:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:00:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:00:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:54,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:00:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:00:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:00:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:00:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:00:54,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787093324] [2023-12-21 03:00:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787093324] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:00:54,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596806619] [2023-12-21 03:00:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:00:54,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:00:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:00:54,875 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) [2023-12-21 03:00:54,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 03:00:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:00:55,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 03:00:55,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:00:55,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:00:55,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:00:55,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:00:55,371 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 16 treesize of output 8 [2023-12-21 03:00:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:00:55,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:00:55,402 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 34 treesize of output 30 [2023-12-21 03:00:55,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-21 03:00:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:00:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596806619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:00:55,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:00:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-12-21 03:00:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977260908] [2023-12-21 03:00:55,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:00:55,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 03:00:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:00:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 03:00:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-12-21 03:00:55,521 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 03:00:59,538 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] [2023-12-21 03:01:03,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:07,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:11,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:15,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:19,716 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] [2023-12-21 03:01:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:20,217 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-12-21 03:01:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 03:01:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-12-21 03:01:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:20,222 INFO L225 Difference]: With dead ends: 109 [2023-12-21 03:01:20,222 INFO L226 Difference]: Without dead ends: 106 [2023-12-21 03:01:20,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-12-21 03:01:20,224 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 45 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:20,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 385 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 608 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2023-12-21 03:01:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-21 03:01:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-12-21 03:01:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 85 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:01:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-12-21 03:01:20,236 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 32 [2023-12-21 03:01:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:20,236 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-12-21 03:01:20,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 03:01:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-12-21 03:01:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 03:01:20,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:20,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:01:20,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 03:01:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:20,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:20,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 877821295, now seen corresponding path program 1 times [2023-12-21 03:01:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:20,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148642033] [2023-12-21 03:01:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:20,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:20,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:01:20,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148642033] [2023-12-21 03:01:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148642033] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690630694] [2023-12-21 03:01:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:20,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:20,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:20,918 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) [2023-12-21 03:01:20,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 03:01:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:21,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-21 03:01:21,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:21,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:21,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:21,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:01:21,310 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 16 treesize of output 8 [2023-12-21 03:01:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:01:21,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:01:21,338 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 34 treesize of output 30 [2023-12-21 03:01:21,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-21 03:01:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:01:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690630694] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:01:21,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:01:21,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-12-21 03:01:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143186513] [2023-12-21 03:01:21,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:01:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 03:01:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:01:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 03:01:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-12-21 03:01:21,401 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 03:01:25,414 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] [2023-12-21 03:01:29,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:33,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:37,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:41,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:01:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:41,990 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2023-12-21 03:01:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 03:01:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2023-12-21 03:01:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:41,992 INFO L225 Difference]: With dead ends: 112 [2023-12-21 03:01:41,992 INFO L226 Difference]: Without dead ends: 109 [2023-12-21 03:01:41,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-12-21 03:01:41,993 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 230 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:41,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 411 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 668 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time] [2023-12-21 03:01:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-21 03:01:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-12-21 03:01:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.225) internal successors, (98), 88 states have internal predecessors, (98), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:01:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2023-12-21 03:01:42,005 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 34 [2023-12-21 03:01:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:42,005 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-12-21 03:01:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 03:01:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2023-12-21 03:01:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 03:01:42,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:42,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-21 03:01:42,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 03:01:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-21 03:01:42,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:42,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 822846683, now seen corresponding path program 1 times [2023-12-21 03:01:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:42,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681260628] [2023-12-21 03:01:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:42,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:42,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:01:43,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681260628] [2023-12-21 03:01:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681260628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939413584] [2023-12-21 03:01:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:43,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:43,168 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) [2023-12-21 03:01:43,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 03:01:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:43,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-21 03:01:43,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:43,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:43,454 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 [2023-12-21 03:01:43,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:01:43,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:01:43,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:43,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 20 [2023-12-21 03:01:43,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:43,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:43,602 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 37 treesize of output 25 [2023-12-21 03:01:43,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-12-21 03:01:43,630 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 16 treesize of output 4 [2023-12-21 03:01:43,632 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 [2023-12-21 03:01:43,663 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-21 03:01:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:43,680 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 25 treesize of output 20 [2023-12-21 03:01:43,690 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:01:43,690 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 [2023-12-21 03:01:43,722 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 24 treesize of output 16 [2023-12-21 03:01:43,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:01:43,733 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 16 treesize of output 8 [2023-12-21 03:01:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-21 03:01:43,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:01:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939413584] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:43,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:01:43,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 27 [2023-12-21 03:01:43,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567912587] [2023-12-21 03:01:43,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:01:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 03:01:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:01:43,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 03:01:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=629, Unknown=1, NotChecked=50, Total=756 [2023-12-21 03:01:43,812 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 27 states, 17 states have (on average 2.764705882352941) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 03:01:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:44,784 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2023-12-21 03:01:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 03:01:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 17 states have (on average 2.764705882352941) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-12-21 03:01:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:44,785 INFO L225 Difference]: With dead ends: 175 [2023-12-21 03:01:44,786 INFO L226 Difference]: Without dead ends: 172 [2023-12-21 03:01:44,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1240, Unknown=1, NotChecked=72, Total=1482 [2023-12-21 03:01:44,787 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 265 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:44,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 598 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1294 Invalid, 0 Unknown, 189 Unchecked, 0.7s Time] [2023-12-21 03:01:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-21 03:01:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2023-12-21 03:01:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 107 states have internal predecessors, (120), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:01:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2023-12-21 03:01:44,803 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 38 [2023-12-21 03:01:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:44,806 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2023-12-21 03:01:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 17 states have (on average 2.764705882352941) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 03:01:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2023-12-21 03:01:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 03:01:44,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:44,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-21 03:01:44,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 03:01:45,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:45,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:45,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1779369084, now seen corresponding path program 1 times [2023-12-21 03:01:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:45,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542059401] [2023-12-21 03:01:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:45,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:01:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:01:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542059401] [2023-12-21 03:01:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542059401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311766814] [2023-12-21 03:01:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:46,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:46,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:46,239 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) [2023-12-21 03:01:46,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 03:01:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:46,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-21 03:01:46,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:46,488 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 [2023-12-21 03:01:46,535 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 30 treesize of output 11 [2023-12-21 03:01:46,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:46,541 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 30 treesize of output 11 [2023-12-21 03:01:46,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:46,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:46,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2023-12-21 03:01:46,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:46,694 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 [2023-12-21 03:01:46,697 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 [2023-12-21 03:01:46,699 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 [2023-12-21 03:01:46,766 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12|) 0) 0))) is different from true [2023-12-21 03:01:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:46,778 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 20 treesize of output 15 [2023-12-21 03:01:46,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:46,783 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 20 treesize of output 15 [2023-12-21 03:01:46,792 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:01:46,793 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 [2023-12-21 03:01:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-21 03:01:47,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:01:47,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311766814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:47,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:01:47,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2023-12-21 03:01:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129712434] [2023-12-21 03:01:47,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:01:47,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 03:01:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:01:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 03:01:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=665, Unknown=1, NotChecked=52, Total=812 [2023-12-21 03:01:47,258 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 27 states, 17 states have (on average 3.764705882352941) internal successors, (64), 25 states have internal predecessors, (64), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 03:01:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:48,976 INFO L93 Difference]: Finished difference Result 218 states and 264 transitions. [2023-12-21 03:01:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 03:01:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 17 states have (on average 3.764705882352941) internal successors, (64), 25 states have internal predecessors, (64), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2023-12-21 03:01:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:48,979 INFO L225 Difference]: With dead ends: 218 [2023-12-21 03:01:48,979 INFO L226 Difference]: Without dead ends: 215 [2023-12-21 03:01:48,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=1496, Unknown=1, NotChecked=80, Total=1806 [2023-12-21 03:01:48,980 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 278 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:48,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 491 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1142 Invalid, 0 Unknown, 228 Unchecked, 1.1s Time] [2023-12-21 03:01:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-21 03:01:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 128. [2023-12-21 03:01:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 109 states have internal predecessors, (123), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:01:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 152 transitions. [2023-12-21 03:01:49,004 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 152 transitions. Word has length 42 [2023-12-21 03:01:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:49,005 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 152 transitions. [2023-12-21 03:01:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 17 states have (on average 3.764705882352941) internal successors, (64), 25 states have internal predecessors, (64), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 03:01:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 152 transitions. [2023-12-21 03:01:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 03:01:49,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:49,006 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-21 03:01:49,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 03:01:49,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:49,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:49,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2133715017, now seen corresponding path program 1 times [2023-12-21 03:01:49,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:49,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76155026] [2023-12-21 03:01:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:49,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:01:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76155026] [2023-12-21 03:01:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76155026] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872324841] [2023-12-21 03:01:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:50,258 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) [2023-12-21 03:01:50,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 03:01:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:50,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 124 conjunts are in the unsatisfiable core [2023-12-21 03:01:50,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:50,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:50,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:50,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:50,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:50,674 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 7 [2023-12-21 03:01:50,707 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 [2023-12-21 03:01:50,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:01:50,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:01:50,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:01:50,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:01:50,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-12-21 03:01:50,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:01:50,969 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 59 treesize of output 43 [2023-12-21 03:01:50,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:50,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2023-12-21 03:01:50,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:51,040 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 19 treesize of output 7 [2023-12-21 03:01:51,043 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 15 treesize of output 3 [2023-12-21 03:01:51,045 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 [2023-12-21 03:01:51,144 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9|) 0) 0))) is different from true [2023-12-21 03:01:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:51,160 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 28 treesize of output 23 [2023-12-21 03:01:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:51,166 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 24 treesize of output 19 [2023-12-21 03:01:51,174 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:01:51,174 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 [2023-12-21 03:01:51,290 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 42 treesize of output 30 [2023-12-21 03:01:51,294 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 34 treesize of output 22 [2023-12-21 03:01:51,298 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 19 treesize of output 11 [2023-12-21 03:01:51,408 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 15 treesize of output 7 [2023-12-21 03:01:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-21 03:01:51,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:01:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872324841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:51,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:01:51,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2023-12-21 03:01:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873833942] [2023-12-21 03:01:51,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:01:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 03:01:51,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:01:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 03:01:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1034, Unknown=1, NotChecked=64, Total=1190 [2023-12-21 03:01:51,603 INFO L87 Difference]: Start difference. First operand 128 states and 152 transitions. Second operand has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 03:01:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:53,568 INFO L93 Difference]: Finished difference Result 291 states and 348 transitions. [2023-12-21 03:01:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 03:01:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-12-21 03:01:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:53,571 INFO L225 Difference]: With dead ends: 291 [2023-12-21 03:01:53,571 INFO L226 Difference]: Without dead ends: 221 [2023-12-21 03:01:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=231, Invalid=2322, Unknown=1, NotChecked=98, Total=2652 [2023-12-21 03:01:53,574 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 322 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 673 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1528 Invalid, 0 Unknown, 210 Unchecked, 1.2s Time] [2023-12-21 03:01:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-21 03:01:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2023-12-21 03:01:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 134 states have internal predecessors, (147), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 03:01:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2023-12-21 03:01:53,597 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 42 [2023-12-21 03:01:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:53,598 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2023-12-21 03:01:53,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 03:01:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2023-12-21 03:01:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 03:01:53,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:53,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2023-12-21 03:01:53,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 03:01:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:53,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:53,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1367321695, now seen corresponding path program 1 times [2023-12-21 03:01:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875892480] [2023-12-21 03:01:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:54,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 03:01:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:01:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875892480] [2023-12-21 03:01:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875892480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815982862] [2023-12-21 03:01:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:55,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:55,056 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) [2023-12-21 03:01:55,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 03:01:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:55,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-21 03:01:55,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:55,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:55,392 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 [2023-12-21 03:01:55,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:01:55,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:01:55,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:55,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 20 [2023-12-21 03:01:55,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:55,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:55,533 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 37 treesize of output 25 [2023-12-21 03:01:55,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-12-21 03:01:55,565 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 16 treesize of output 4 [2023-12-21 03:01:55,567 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 [2023-12-21 03:01:55,621 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-21 03:01:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:55,628 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 25 treesize of output 20 [2023-12-21 03:01:55,642 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-12-21 03:01:55,643 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 21 treesize of output 29 [2023-12-21 03:01:55,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 4 [2023-12-21 03:01:55,716 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 [2023-12-21 03:01:55,745 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-21 03:01:55,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:01:55,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-12-21 03:01:55,763 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-12-21 03:01:55,763 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 [2023-12-21 03:01:55,798 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 24 treesize of output 16 [2023-12-21 03:01:55,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:01:55,809 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 16 treesize of output 8 [2023-12-21 03:01:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-12-21 03:01:55,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:01:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815982862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:55,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:01:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 35 [2023-12-21 03:01:55,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738473373] [2023-12-21 03:01:55,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:01:55,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 03:01:55,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:01:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 03:01:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1024, Unknown=2, NotChecked=130, Total=1260 [2023-12-21 03:01:55,892 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 35 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 30 states have internal predecessors, (59), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:01:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:01:57,249 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2023-12-21 03:01:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 03:01:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 30 states have internal predecessors, (59), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2023-12-21 03:01:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:01:57,251 INFO L225 Difference]: With dead ends: 203 [2023-12-21 03:01:57,251 INFO L226 Difference]: Without dead ends: 200 [2023-12-21 03:01:57,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=1772, Unknown=2, NotChecked=174, Total=2162 [2023-12-21 03:01:57,252 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 237 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 03:01:57,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 823 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1943 Invalid, 0 Unknown, 334 Unchecked, 0.9s Time] [2023-12-21 03:01:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-12-21 03:01:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2023-12-21 03:01:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 125 states have (on average 1.2) internal successors, (150), 136 states have internal predecessors, (150), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 03:01:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2023-12-21 03:01:57,278 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 45 [2023-12-21 03:01:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:01:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2023-12-21 03:01:57,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 30 states have internal predecessors, (59), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:01:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2023-12-21 03:01:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 03:01:57,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:01:57,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-21 03:01:57,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 03:01:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:57,496 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:01:57,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:01:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 651148237, now seen corresponding path program 1 times [2023-12-21 03:01:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:01:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067896460] [2023-12-21 03:01:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:57,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:01:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:01:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:01:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:59,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:01:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:59,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:01:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:01:59,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:01:59,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067896460] [2023-12-21 03:01:59,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067896460] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:01:59,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337537006] [2023-12-21 03:01:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:01:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:01:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:01:59,174 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) [2023-12-21 03:01:59,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 03:01:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:01:59,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 154 conjunts are in the unsatisfiable core [2023-12-21 03:01:59,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:01:59,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-12-21 03:01:59,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:01:59,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-12-21 03:01:59,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-12-21 03:01:59,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:59,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:01:59,649 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 51 treesize of output 31 [2023-12-21 03:01:59,658 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 7 treesize of output 3 [2023-12-21 03:01:59,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:59,724 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 9 treesize of output 3 [2023-12-21 03:01:59,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-21 03:01:59,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-21 03:01:59,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:01:59,943 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-21 03:01:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2023-12-21 03:01:59,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:01:59,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:02:00,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:02:00,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-21 03:02:00,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-21 03:02:00,181 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 9 treesize of output 3 [2023-12-21 03:02:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:02:05,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:02:05,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:02:05,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:02:05,130 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:02:05,131 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 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-21 03:02:06,275 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 27 treesize of output 19 [2023-12-21 03:02:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:02:06,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:02:07,200 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 39 treesize of output 31 [2023-12-21 03:02:07,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337537006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:02:07,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:02:07,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 38 [2023-12-21 03:02:07,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320971520] [2023-12-21 03:02:07,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:02:07,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 03:02:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:02:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 03:02:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1951, Unknown=1, NotChecked=0, Total=2162 [2023-12-21 03:02:07,527 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 38 states, 25 states have (on average 2.8) internal successors, (70), 34 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:02:10,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:15,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:21,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:25,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:29,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:34,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:39,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:43,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:48,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:52,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:02:56,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:01,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:06,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:10,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:16,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:20,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:25,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:29,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:33,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:38,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:42,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:03:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:03:43,082 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2023-12-21 03:03:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 03:03:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 25 states have (on average 2.8) internal successors, (70), 34 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2023-12-21 03:03:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:03:43,085 INFO L225 Difference]: With dead ends: 269 [2023-12-21 03:03:43,085 INFO L226 Difference]: Without dead ends: 266 [2023-12-21 03:03:43,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=467, Invalid=4224, Unknown=1, NotChecked=0, Total=4692 [2023-12-21 03:03:43,087 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 315 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 116 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:03:43,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 728 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2043 Invalid, 32 Unknown, 0 Unchecked, 91.1s Time] [2023-12-21 03:03:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-21 03:03:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 159. [2023-12-21 03:03:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.192) internal successors, (149), 135 states have internal predecessors, (149), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 03:03:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2023-12-21 03:03:43,122 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 45 [2023-12-21 03:03:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:03:43,123 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2023-12-21 03:03:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 25 states have (on average 2.8) internal successors, (70), 34 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:03:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2023-12-21 03:03:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 03:03:43,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:03:43,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2023-12-21 03:03:43,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 03:03:43,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:03:43,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:03:43,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:03:43,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1402806206, now seen corresponding path program 1 times [2023-12-21 03:03:43,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:03:43,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896557071] [2023-12-21 03:03:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:03:43,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:03:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:45,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:03:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:45,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:03:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:03:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:47,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 03:03:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-21 03:03:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:03:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:03:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896557071] [2023-12-21 03:03:48,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896557071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:03:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026437025] [2023-12-21 03:03:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:03:48,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:03:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:03:48,164 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) [2023-12-21 03:03:48,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 03:03:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:03:48,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-21 03:03:48,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:03:48,752 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 [2023-12-21 03:03:48,831 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 30 treesize of output 11 [2023-12-21 03:03:48,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:03:48,865 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 30 treesize of output 11 [2023-12-21 03:03:48,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:03:49,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:03:49,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2023-12-21 03:03:49,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:03:49,786 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 [2023-12-21 03:03:49,796 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 [2023-12-21 03:03:49,808 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 [2023-12-21 03:03:50,397 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_29| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_29|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2023-12-21 03:03:50,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:03:50,423 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 20 treesize of output 15 [2023-12-21 03:03:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:03:50,441 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 20 treesize of output 15 [2023-12-21 03:03:50,522 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-21 03:03:50,522 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 [2023-12-21 03:03:50,862 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 [2023-12-21 03:03:50,872 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 [2023-12-21 03:03:50,882 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 [2023-12-21 03:03:51,396 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_29| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_29|) 0) 0))) is different from true [2023-12-21 03:03:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:03:51,436 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 20 treesize of output 15 [2023-12-21 03:03:51,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:03:51,458 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 20 treesize of output 15 [2023-12-21 03:03:51,493 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:03:51,494 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 [2023-12-21 03:03:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-12-21 03:03:53,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:03:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026437025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:03:54,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:03:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 36 [2023-12-21 03:03:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329530999] [2023-12-21 03:03:54,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:03:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 03:03:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:03:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 03:03:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1155, Unknown=2, NotChecked=138, Total=1406 [2023-12-21 03:03:54,056 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 36 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 03:04:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:04:06,655 INFO L93 Difference]: Finished difference Result 241 states and 287 transitions. [2023-12-21 03:04:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 03:04:06,656 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 49 [2023-12-21 03:04:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:04:06,657 INFO L225 Difference]: With dead ends: 241 [2023-12-21 03:04:06,657 INFO L226 Difference]: Without dead ends: 238 [2023-12-21 03:04:06,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=300, Invalid=2786, Unknown=2, NotChecked=218, Total=3306 [2023-12-21 03:04:06,658 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 300 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-12-21 03:04:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 631 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1856 Invalid, 0 Unknown, 392 Unchecked, 8.3s Time] [2023-12-21 03:04:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-21 03:04:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 134. [2023-12-21 03:04:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-21 03:04:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-12-21 03:04:06,696 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 49 [2023-12-21 03:04:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:04:06,697 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-12-21 03:04:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 03:04:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-12-21 03:04:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 03:04:06,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:04:06,697 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:04:06,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 03:04:06,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-21 03:04:06,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:04:06,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:04:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1048460273, now seen corresponding path program 1 times [2023-12-21 03:04:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:04:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732869908] [2023-12-21 03:04:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:04:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:04:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:04:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:08,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:04:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:08,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:04:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 03:04:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:04:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:04:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732869908] [2023-12-21 03:04:10,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732869908] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:04:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956032540] [2023-12-21 03:04:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:04:10,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:04:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:04:10,070 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) [2023-12-21 03:04:10,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 03:04:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:10,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 141 conjunts are in the unsatisfiable core [2023-12-21 03:04:10,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:04:10,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:04:10,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:04:11,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:04:11,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:04:11,663 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 7 [2023-12-21 03:04:11,904 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 [2023-12-21 03:04:12,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:04:12,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:12,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:04:12,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:12,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:04:12,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-12-21 03:04:13,136 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 59 treesize of output 43 [2023-12-21 03:04:13,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:04:13,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2023-12-21 03:04:13,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:04:13,471 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 19 treesize of output 7 [2023-12-21 03:04:13,482 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 15 treesize of output 3 [2023-12-21 03:04:13,492 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 [2023-12-21 03:04:14,150 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_16| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_16|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2023-12-21 03:04:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:04:14,177 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 28 treesize of output 23 [2023-12-21 03:04:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:04:14,200 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 24 treesize of output 19 [2023-12-21 03:04:14,287 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-21 03:04:14,288 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 [2023-12-21 03:04:14,681 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 19 treesize of output 7 [2023-12-21 03:04:14,690 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 15 treesize of output 3 [2023-12-21 03:04:14,700 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 [2023-12-21 03:04:15,251 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_16| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_16|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17|) 0) 0))) is different from true [2023-12-21 03:04:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:04:15,296 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 28 treesize of output 23 [2023-12-21 03:04:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:04:15,309 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 24 treesize of output 19 [2023-12-21 03:04:15,355 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:04:15,355 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 [2023-12-21 03:04:15,880 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 42 treesize of output 30 [2023-12-21 03:04:15,892 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 34 treesize of output 22 [2023-12-21 03:04:15,909 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 19 treesize of output 11 [2023-12-21 03:04:16,681 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 15 treesize of output 7 [2023-12-21 03:04:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 5 not checked. [2023-12-21 03:04:16,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:04:17,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956032540] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:04:17,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:04:17,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2023-12-21 03:04:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661261493] [2023-12-21 03:04:17,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:04:17,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 03:04:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:04:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 03:04:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1228, Unknown=2, NotChecked=142, Total=1482 [2023-12-21 03:04:17,652 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 38 states, 26 states have (on average 2.769230769230769) internal successors, (72), 33 states have internal predecessors, (72), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 03:04:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:04:28,142 INFO L93 Difference]: Finished difference Result 285 states and 335 transitions. [2023-12-21 03:04:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 03:04:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 26 states have (on average 2.769230769230769) internal successors, (72), 33 states have internal predecessors, (72), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2023-12-21 03:04:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:04:28,144 INFO L225 Difference]: With dead ends: 285 [2023-12-21 03:04:28,144 INFO L226 Difference]: Without dead ends: 216 [2023-12-21 03:04:28,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=268, Invalid=2600, Unknown=2, NotChecked=210, Total=3080 [2023-12-21 03:04:28,146 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:04:28,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 652 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1581 Invalid, 0 Unknown, 408 Unchecked, 7.1s Time] [2023-12-21 03:04:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-21 03:04:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 133. [2023-12-21 03:04:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 112 states have internal predecessors, (123), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 03:04:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2023-12-21 03:04:28,174 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 49 [2023-12-21 03:04:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:04:28,175 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2023-12-21 03:04:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 26 states have (on average 2.769230769230769) internal successors, (72), 33 states have internal predecessors, (72), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 03:04:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2023-12-21 03:04:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 03:04:28,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:04:28,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:04:28,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 03:04:28,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 03:04:28,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:04:28,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:04:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1130757783, now seen corresponding path program 1 times [2023-12-21 03:04:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:04:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471634422] [2023-12-21 03:04:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:04:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:04:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:04:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:30,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:04:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:30,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 03:04:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 03:04:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:04:32,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:04:32,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471634422] [2023-12-21 03:04:32,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471634422] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:04:32,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040396997] [2023-12-21 03:04:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:04:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:04:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:04:32,148 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) [2023-12-21 03:04:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 03:04:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:32,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 133 conjunts are in the unsatisfiable core [2023-12-21 03:04:32,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:04:32,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:04:33,161 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 [2023-12-21 03:04:33,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:04:33,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:04:33,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:33,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2023-12-21 03:04:34,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:04:34,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:34,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:04:34,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2023-12-21 03:04:34,897 INFO L349 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2023-12-21 03:04:34,898 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 37 treesize of output 44 [2023-12-21 03:04:35,014 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-21 03:04:35,015 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 37 treesize of output 53 [2023-12-21 03:04:35,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:04:35,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:04:35,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:04:35,501 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 93 treesize of output 65 [2023-12-21 03:04:35,519 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 84 treesize of output 64 [2023-12-21 03:04:35,801 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-21 03:04:35,802 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 21 [2023-12-21 03:04:35,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2023-12-21 03:04:35,833 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 [2023-12-21 03:04:36,314 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-21 03:04:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:04:36,379 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-21 03:04:36,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 55 [2023-12-21 03:04:36,494 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-21 03:04:36,494 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 32 treesize of output 34 [2023-12-21 03:04:36,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-12-21 03:04:36,862 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 63 treesize of output 43 [2023-12-21 03:04:36,874 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 47 treesize of output 31 [2023-12-21 03:04:37,654 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 7 treesize of output 3 [2023-12-21 03:04:38,017 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:04:38,017 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-21 03:04:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-21 03:04:38,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:04:38,417 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3088 (Array Int Int)) (v_ArrVal_3089 (Array Int Int)) (|v_chain_node_~node~0#1.base_50| Int)) (or (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (let ((.cse0 (store |c_#memory_$Pointer$#3.base| |v_chain_node_~node~0#1.base_50| v_ArrVal_3089))) (select .cse0 (select (select .cse0 .cse1) .cse2))) (select (select (store |c_#memory_$Pointer$#3.offset| |v_chain_node_~node~0#1.base_50| v_ArrVal_3088) .cse1) .cse2))) 0)) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_50|) 0)))) is different from false [2023-12-21 03:04:38,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040396997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:04:38,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:04:38,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 40 [2023-12-21 03:04:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633391775] [2023-12-21 03:04:38,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:04:38,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 03:04:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:04:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 03:04:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1372, Unknown=2, NotChecked=150, Total=1640 [2023-12-21 03:04:38,423 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 40 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 33 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:04:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:04:50,062 INFO L93 Difference]: Finished difference Result 212 states and 253 transitions. [2023-12-21 03:04:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 03:04:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 33 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2023-12-21 03:04:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:04:50,064 INFO L225 Difference]: With dead ends: 212 [2023-12-21 03:04:50,064 INFO L226 Difference]: Without dead ends: 209 [2023-12-21 03:04:50,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=254, Invalid=2404, Unknown=2, NotChecked=202, Total=2862 [2023-12-21 03:04:50,065 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 277 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:04:50,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1409 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2372 Invalid, 0 Unknown, 200 Unchecked, 9.2s Time] [2023-12-21 03:04:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-21 03:04:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2023-12-21 03:04:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 116 states have internal predecessors, (128), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 03:04:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2023-12-21 03:04:50,098 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 49 [2023-12-21 03:04:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:04:50,098 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2023-12-21 03:04:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 33 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:04:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2023-12-21 03:04:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 03:04:50,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:04:50,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:04:50,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 03:04:50,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 03:04:50,304 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:04:50,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:04:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -989002747, now seen corresponding path program 2 times [2023-12-21 03:04:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:04:50,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341729421] [2023-12-21 03:04:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:04:50,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:04:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:53,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:04:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:04:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:54,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 03:04:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:55,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 03:04:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:04:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:04:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:04:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341729421] [2023-12-21 03:04:56,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341729421] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:04:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120548327] [2023-12-21 03:04:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:04:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:04:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:04:56,430 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) [2023-12-21 03:04:56,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 03:04:56,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:04:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:04:56,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 177 conjunts are in the unsatisfiable core [2023-12-21 03:04:56,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:04:57,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:04:57,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:04:57,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:04:57,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:04:57,755 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 7 [2023-12-21 03:04:58,008 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 [2023-12-21 03:04:58,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:04:58,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:58,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:04:58,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:04:58,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2023-12-21 03:04:58,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 03:04:59,263 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 36 treesize of output 24 [2023-12-21 03:04:59,277 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 7 [2023-12-21 03:05:00,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:05:00,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:05:00,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 39 [2023-12-21 03:05:00,566 INFO L349 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2023-12-21 03:05:00,567 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 40 treesize of output 47 [2023-12-21 03:05:00,577 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 7 [2023-12-21 03:05:00,673 INFO L349 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2023-12-21 03:05:00,673 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 36 treesize of output 43 [2023-12-21 03:05:00,783 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-21 03:05:00,783 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 37 treesize of output 53 [2023-12-21 03:05:00,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:05:01,524 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 119 treesize of output 87 [2023-12-21 03:05:01,534 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 110 treesize of output 86 [2023-12-21 03:05:01,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:05:01,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:05:01,957 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-21 03:05:01,958 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 31 [2023-12-21 03:05:01,984 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 23 treesize of output 7 [2023-12-21 03:05:01,995 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 [2023-12-21 03:05:02,764 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_21| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_21|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_22| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_22|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20|) 0) 0))) is different from true [2023-12-21 03:05:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:05:02,870 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-21 03:05:02,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 71 [2023-12-21 03:05:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:05:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:05:02,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 43 treesize of output 41 [2023-12-21 03:05:02,995 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-21 03:05:02,995 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 32 treesize of output 34 [2023-12-21 03:05:03,675 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 61 [2023-12-21 03:05:03,686 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 65 treesize of output 45 [2023-12-21 03:05:03,697 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 23 treesize of output 15 [2023-12-21 03:05:05,258 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:05:05,259 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2023-12-21 03:05:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-12-21 03:05:05,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:05:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120548327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:05:07,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:05:07,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2023-12-21 03:05:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326407508] [2023-12-21 03:05:07,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:05:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-21 03:05:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:05:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-21 03:05:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2507, Unknown=1, NotChecked=100, Total=2756 [2023-12-21 03:05:07,927 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 46 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 39 states have internal predecessors, (83), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:05:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:05:29,649 INFO L93 Difference]: Finished difference Result 312 states and 367 transitions. [2023-12-21 03:05:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 03:05:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 39 states have internal predecessors, (83), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2023-12-21 03:05:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:05:29,650 INFO L225 Difference]: With dead ends: 312 [2023-12-21 03:05:29,650 INFO L226 Difference]: Without dead ends: 243 [2023-12-21 03:05:29,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=399, Invalid=4860, Unknown=1, NotChecked=142, Total=5402 [2023-12-21 03:05:29,652 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 358 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 3696 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-12-21 03:05:29,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1796 Invalid, 4039 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [118 Valid, 3696 Invalid, 0 Unknown, 225 Unchecked, 15.7s Time] [2023-12-21 03:05:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-21 03:05:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2023-12-21 03:05:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 139 states have internal predecessors, (154), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 03:05:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2023-12-21 03:05:29,693 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 53 [2023-12-21 03:05:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:05:29,693 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2023-12-21 03:05:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 39 states have internal predecessors, (83), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:05:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2023-12-21 03:05:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 03:05:29,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:05:29,694 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:05:29,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-21 03:05:29,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 03:05:29,902 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:05:29,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:05:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 725485248, now seen corresponding path program 1 times [2023-12-21 03:05:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:05:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300498182] [2023-12-21 03:05:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:05:29,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:05:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:30,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:05:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:30,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:05:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:30,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:05:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:05:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:05:30,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:05:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300498182] [2023-12-21 03:05:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300498182] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:05:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704207719] [2023-12-21 03:05:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:05:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:05:30,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:05:30,792 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) [2023-12-21 03:05:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 03:05:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:05:31,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 03:05:31,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:05:31,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:05:31,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:05:31,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:05:32,669 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 16 treesize of output 8 [2023-12-21 03:05:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:05:33,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:05:33,357 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 34 treesize of output 30 [2023-12-21 03:05:33,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-21 03:05:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:05:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704207719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:05:34,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:05:34,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 22 [2023-12-21 03:05:34,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229775629] [2023-12-21 03:05:34,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:05:34,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 03:05:34,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:05:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 03:05:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-12-21 03:05:34,070 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 22 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 03:05:38,096 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] [2023-12-21 03:05:42,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:05:46,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:05:50,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:05:54,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:05:59,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:08,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:06:08,624 INFO L93 Difference]: Finished difference Result 242 states and 286 transitions. [2023-12-21 03:06:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 03:06:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2023-12-21 03:06:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:06:08,626 INFO L225 Difference]: With dead ends: 242 [2023-12-21 03:06:08,626 INFO L226 Difference]: Without dead ends: 190 [2023-12-21 03:06:08,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 03:06:08,627 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 159 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 43 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2023-12-21 03:06:08,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 590 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1379 Invalid, 7 Unknown, 0 Unchecked, 32.7s Time] [2023-12-21 03:06:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-21 03:06:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2023-12-21 03:06:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 152 states have internal predecessors, (170), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 03:06:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2023-12-21 03:06:08,668 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 55 [2023-12-21 03:06:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:06:08,668 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2023-12-21 03:06:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 03:06:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2023-12-21 03:06:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 03:06:08,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:06:08,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:06:08,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 03:06:08,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 03:06:08,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:06:08,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:06:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1319745871, now seen corresponding path program 1 times [2023-12-21 03:06:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:06:08,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493429456] [2023-12-21 03:06:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:06:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:06:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:10,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:06:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:11,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:06:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:11,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:06:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:11,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:06:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:06:12,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:06:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493429456] [2023-12-21 03:06:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493429456] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:06:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716398563] [2023-12-21 03:06:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:06:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:06:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:06:12,299 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) [2023-12-21 03:06:12,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 03:06:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:12,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-21 03:06:12,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:06:12,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:06:13,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:06:13,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 03:06:15,267 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 16 treesize of output 8 [2023-12-21 03:06:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:06:15,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:06:16,275 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 34 treesize of output 30 [2023-12-21 03:06:16,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-21 03:06:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:06:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716398563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:06:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:06:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 10] total 35 [2023-12-21 03:06:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962353093] [2023-12-21 03:06:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:06:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 03:06:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:06:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 03:06:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 03:06:17,033 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 35 states, 25 states have (on average 5.12) internal successors, (128), 33 states have internal predecessors, (128), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 03:06:21,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:25,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:29,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:34,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:06:39,432 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] [2023-12-21 03:06:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:06:49,680 INFO L93 Difference]: Finished difference Result 359 states and 419 transitions. [2023-12-21 03:06:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 03:06:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 25 states have (on average 5.12) internal successors, (128), 33 states have internal predecessors, (128), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 59 [2023-12-21 03:06:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:06:49,681 INFO L225 Difference]: With dead ends: 359 [2023-12-21 03:06:49,681 INFO L226 Difference]: Without dead ends: 295 [2023-12-21 03:06:49,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=387, Invalid=4305, Unknown=0, NotChecked=0, Total=4692 [2023-12-21 03:06:49,683 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 304 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 88 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:06:49,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 909 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2048 Invalid, 5 Unknown, 0 Unchecked, 27.0s Time] [2023-12-21 03:06:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-12-21 03:06:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 253. [2023-12-21 03:06:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 208 states have (on average 1.1586538461538463) internal successors, (241), 220 states have internal predecessors, (241), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (22), 16 states have call predecessors, (22), 20 states have call successors, (22) [2023-12-21 03:06:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 290 transitions. [2023-12-21 03:06:49,761 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 290 transitions. Word has length 59 [2023-12-21 03:06:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:06:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 290 transitions. [2023-12-21 03:06:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 25 states have (on average 5.12) internal successors, (128), 33 states have internal predecessors, (128), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 03:06:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 290 transitions. [2023-12-21 03:06:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 03:06:49,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:06:49,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:06:49,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 03:06:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 03:06:49,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:06:49,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:06:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1244369143, now seen corresponding path program 3 times [2023-12-21 03:06:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:06:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918249673] [2023-12-21 03:06:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:06:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:06:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:06:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:06:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:53,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 03:06:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 03:06:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:55,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 03:06:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:06:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 03:06:56,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:06:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918249673] [2023-12-21 03:06:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918249673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:06:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031722869] [2023-12-21 03:06:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:06:56,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:06:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:06:56,126 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) [2023-12-21 03:06:56,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 03:06:57,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 03:06:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:06:57,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 213 conjunts are in the unsatisfiable core [2023-12-21 03:06:57,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:06:57,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:06:58,113 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 [2023-12-21 03:06:58,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:06:58,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:06:58,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:06:58,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 20 [2023-12-21 03:06:59,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:06:59,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:06:59,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:06:59,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-12-21 03:06:59,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 33 [2023-12-21 03:06:59,885 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-12-21 03:06:59,886 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 33 treesize of output 45 [2023-12-21 03:06:59,923 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 41 treesize of output 28 [2023-12-21 03:07:00,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:01,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:01,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 03:07:01,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 50 [2023-12-21 03:07:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:01,423 INFO L349 Elim1Store]: treesize reduction 45, result has 10.0 percent of original size [2023-12-21 03:07:01,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 63 [2023-12-21 03:07:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:01,449 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 49 treesize of output 36 [2023-12-21 03:07:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:01,545 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-21 03:07:01,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 69 [2023-12-21 03:07:02,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:07:02,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:07:02,460 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 138 treesize of output 94 [2023-12-21 03:07:02,509 INFO L349 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2023-12-21 03:07:02,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 48 [2023-12-21 03:07:02,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-21 03:07:02,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 20 treesize of output 10 [2023-12-21 03:07:03,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:03,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 94 [2023-12-21 03:07:03,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:03,641 INFO L349 Elim1Store]: treesize reduction 88, result has 11.1 percent of original size [2023-12-21 03:07:03,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 74 [2023-12-21 03:07:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:03,779 INFO L349 Elim1Store]: treesize reduction 12, result has 80.3 percent of original size [2023-12-21 03:07:03,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 61 [2023-12-21 03:07:03,790 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 76 treesize of output 52 [2023-12-21 03:07:03,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:03,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-12-21 03:07:04,559 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 131 treesize of output 87 [2023-12-21 03:07:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:06,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2023-12-21 03:07:07,011 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-12-21 03:07:07,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2023-12-21 03:07:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:07:07,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:07:07,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:07:07,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 96 [2023-12-21 03:07:08,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031722869] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:07:08,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:07:08,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 50 [2023-12-21 03:07:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102640975] [2023-12-21 03:07:08,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:07:08,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-21 03:07:08,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:07:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-21 03:07:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2377, Unknown=1, NotChecked=0, Total=2550 [2023-12-21 03:07:08,049 INFO L87 Difference]: Start difference. First operand 253 states and 290 transitions. Second operand has 50 states, 35 states have (on average 2.6) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:07:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:07:26,892 INFO L93 Difference]: Finished difference Result 378 states and 439 transitions. [2023-12-21 03:07:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 03:07:26,893 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 35 states have (on average 2.6) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 60 [2023-12-21 03:07:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:07:26,894 INFO L225 Difference]: With dead ends: 378 [2023-12-21 03:07:26,894 INFO L226 Difference]: Without dead ends: 375 [2023-12-21 03:07:26,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=438, Invalid=4673, Unknown=1, NotChecked=0, Total=5112 [2023-12-21 03:07:26,896 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 282 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 76 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-12-21 03:07:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1853 Invalid, 3730 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 3650 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2023-12-21 03:07:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-12-21 03:07:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 262. [2023-12-21 03:07:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 215 states have (on average 1.158139534883721) internal successors, (249), 228 states have internal predecessors, (249), 28 states have call successors, (28), 17 states have call predecessors, (28), 18 states have return successors, (23), 16 states have call predecessors, (23), 21 states have call successors, (23) [2023-12-21 03:07:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2023-12-21 03:07:26,969 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 60 [2023-12-21 03:07:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:07:26,969 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2023-12-21 03:07:26,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 35 states have (on average 2.6) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:07:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2023-12-21 03:07:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-21 03:07:26,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:07:26,970 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2023-12-21 03:07:26,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 03:07:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:07:27,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:07:27,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:07:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash -268278171, now seen corresponding path program 4 times [2023-12-21 03:07:27,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:07:27,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018425653] [2023-12-21 03:07:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:07:27,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:07:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:31,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:07:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:07:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:32,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 03:07:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:33,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 03:07:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 03:07:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:07:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 03:07:34,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:07:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018425653] [2023-12-21 03:07:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018425653] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:07:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572883006] [2023-12-21 03:07:34,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:07:34,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:07:34,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:07:34,879 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) [2023-12-21 03:07:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 03:07:36,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:07:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:07:36,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 248 conjunts are in the unsatisfiable core [2023-12-21 03:07:36,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:07:37,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:07:37,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:07:37,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:07:37,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:07:38,240 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 7 [2023-12-21 03:07:38,478 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 [2023-12-21 03:07:38,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:38,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:07:38,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:38,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-21 03:07:39,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2023-12-21 03:07:39,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 03:07:39,781 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 36 treesize of output 24 [2023-12-21 03:07:39,795 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 7 [2023-12-21 03:07:40,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:07:40,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-12-21 03:07:41,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:07:41,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 39 [2023-12-21 03:07:41,170 INFO L349 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2023-12-21 03:07:41,171 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 36 treesize of output 43 [2023-12-21 03:07:41,274 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-21 03:07:41,274 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 37 treesize of output 53 [2023-12-21 03:07:41,315 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 40 treesize of output 27 [2023-12-21 03:07:41,964 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 104 treesize of output 76 [2023-12-21 03:07:41,985 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-12-21 03:07:41,985 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2023-12-21 03:07:42,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:42,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2023-12-21 03:07:43,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 87 [2023-12-21 03:07:43,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:07:43,260 INFO L349 Elim1Store]: treesize reduction 45, result has 10.0 percent of original size [2023-12-21 03:07:43,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 79 [2023-12-21 03:07:43,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 117 [2023-12-21 03:07:43,432 INFO L349 Elim1Store]: treesize reduction 136, result has 37.9 percent of original size [2023-12-21 03:07:43,432 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 58 treesize of output 101 [2023-12-21 03:07:43,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 57 [2023-12-21 03:07:44,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:07:44,394 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 220 treesize of output 144 [2023-12-21 03:07:44,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:07:44,924 INFO L349 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2023-12-21 03:07:44,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 66 [2023-12-21 03:07:44,943 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2023-12-21 03:07:44,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 20 treesize of output 10 [2023-12-21 03:08:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:08:19,273 INFO L349 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2023-12-21 03:08:19,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 204 treesize of output 147 [2023-12-21 03:08:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:08:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:08:19,341 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2023-12-21 03:08:19,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 156 [2023-12-21 03:08:19,493 INFO L349 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2023-12-21 03:08:19,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 57 [2023-12-21 03:08:25,272 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 209 treesize of output 133 [2023-12-21 03:08:25,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-12-21 03:08:46,581 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-21 03:08:46,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 51 [2023-12-21 03:08:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:08:47,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:09:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572883006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:09:11,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:09:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2023-12-21 03:09:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346122471] [2023-12-21 03:09:11,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:09:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-21 03:09:11,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:09:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-21 03:09:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3336, Unknown=17, NotChecked=0, Total=3540 [2023-12-21 03:09:11,745 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand has 52 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 46 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:09:26,658 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] [2023-12-21 03:09:30,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:09:40,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:09:54,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:09:58,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:07,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:12,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:16,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:20,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:24,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:28,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:38,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:44,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:52,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:10:56,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:00,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:05,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:09,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:13,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:29,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:33,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:44,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:48,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:52,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:11:57,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:02,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:06,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:15,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:20,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:24,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:28,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:33,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:37,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:41,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:45,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:50,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:55,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:12:59,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:13:03,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:13:07,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:13:11,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 03:13:16,094 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] [2023-12-21 03:13:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:13:18,042 INFO L93 Difference]: Finished difference Result 459 states and 527 transitions. [2023-12-21 03:13:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 03:13:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 46 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 64 [2023-12-21 03:13:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:13:18,044 INFO L225 Difference]: With dead ends: 459 [2023-12-21 03:13:18,044 INFO L226 Difference]: Without dead ends: 370 [2023-12-21 03:13:18,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 141.4s TimeCoverageRelationStatistics Valid=521, Invalid=6934, Unknown=27, NotChecked=0, Total=7482 [2023-12-21 03:13:18,046 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 237 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 3739 mSolverCounterSat, 80 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3739 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.5s IncrementalHoareTripleChecker+Time [2023-12-21 03:13:18,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2002 Invalid, 3861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 3739 Invalid, 42 Unknown, 0 Unchecked, 194.5s Time] [2023-12-21 03:13:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-12-21 03:13:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 343. [2023-12-21 03:13:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 278 states have (on average 1.1510791366906474) internal successors, (320), 298 states have internal predecessors, (320), 38 states have call successors, (38), 24 states have call predecessors, (38), 26 states have return successors, (34), 20 states have call predecessors, (34), 31 states have call successors, (34) [2023-12-21 03:13:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 392 transitions. [2023-12-21 03:13:18,144 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 392 transitions. Word has length 64 [2023-12-21 03:13:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:13:18,145 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 392 transitions. [2023-12-21 03:13:18,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 46 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 03:13:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 392 transitions. [2023-12-21 03:13:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 03:13:18,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:13:18,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:13:18,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 03:13:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 03:13:18,356 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:13:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:13:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1423507680, now seen corresponding path program 1 times [2023-12-21 03:13:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:13:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116773001] [2023-12-21 03:13:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:13:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:13:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:13:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:23,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:13:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:23,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:13:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:24,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:13:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:13:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:13:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116773001] [2023-12-21 03:13:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116773001] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:13:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652579500] [2023-12-21 03:13:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:13:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:13:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:13:25,178 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) [2023-12-21 03:13:25,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 03:13:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:13:25,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 199 conjunts are in the unsatisfiable core [2023-12-21 03:13:25,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:13:25,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-12-21 03:13:26,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:13:26,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:13:27,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:13:27,445 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 7 treesize of output 3 [2023-12-21 03:13:27,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:13:27,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-21 03:13:27,888 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 9 treesize of output 3 [2023-12-21 03:13:28,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:13:28,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:13:29,217 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-12-21 03:13:29,217 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 1 case distinctions, treesize of input 19 treesize of output 19 [2023-12-21 03:13:30,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:13:30,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:13:30,565 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 24 treesize of output 16 [2023-12-21 03:13:32,023 INFO L349 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2023-12-21 03:13:32,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 104 [2023-12-21 03:13:32,220 INFO L349 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2023-12-21 03:13:32,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 104 [2023-12-21 03:13:32,253 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 16 treesize of output 15 [2023-12-21 03:13:32,277 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 16 treesize of output 15 [2023-12-21 03:13:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:13:32,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 1 [2023-12-21 03:13:32,358 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 16 treesize of output 15 [2023-12-21 03:13:32,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 16 [2023-12-21 03:13:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:13:32,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 9 [2023-12-21 03:13:32,699 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 7 [2023-12-21 03:13:32,776 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 7 [2023-12-21 03:13:33,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 27 [2023-12-21 03:13:33,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 03:13:34,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-12-21 03:13:35,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:13:35,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2023-12-21 03:13:35,580 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-21 03:13:35,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2023-12-21 03:13:41,735 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-12-21 03:13:41,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 76 [2023-12-21 03:13:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:13:41,776 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-21 03:13:41,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 46 [2023-12-21 03:13:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:13:42,557 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-21 03:13:42,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 16 [2023-12-21 03:13:43,524 INFO L349 Elim1Store]: treesize reduction 130, result has 23.1 percent of original size [2023-12-21 03:13:43,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 90 [2023-12-21 03:13:43,603 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 7 [2023-12-21 03:13:43,772 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 33 treesize of output 27 [2023-12-21 03:13:43,825 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 24 treesize of output 20 [2023-12-21 03:13:45,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:13:45,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 180 [2023-12-21 03:13:46,625 INFO L349 Elim1Store]: treesize reduction 8, result has 93.4 percent of original size [2023-12-21 03:13:46,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 135 treesize of output 223 [2023-12-21 03:13:52,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-21 03:13:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:13:52,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:13:52,720 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5179 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_init_back_link_~next~0#1.base| v_ArrVal_5179) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) 0))) is different from false [2023-12-21 03:13:52,746 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5179 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#3.base| (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_init_back_link_~list#1.base|) |c_ULTIMATE.start_init_back_link_~list#1.offset|) v_ArrVal_5179) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) 0))) is different from false [2023-12-21 03:13:56,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652579500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:13:56,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 03:13:56,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 59 [2023-12-21 03:13:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623118687] [2023-12-21 03:13:56,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 03:13:56,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-21 03:13:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:13:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-21 03:13:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3686, Unknown=33, NotChecked=246, Total=4160 [2023-12-21 03:13:56,032 INFO L87 Difference]: Start difference. First operand 343 states and 392 transitions. Second operand has 59 states, 43 states have (on average 2.488372093023256) internal successors, (107), 52 states have internal predecessors, (107), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:14:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:14:34,814 INFO L93 Difference]: Finished difference Result 468 states and 537 transitions. [2023-12-21 03:14:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 03:14:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 43 states have (on average 2.488372093023256) internal successors, (107), 52 states have internal predecessors, (107), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 65 [2023-12-21 03:14:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:14:34,822 INFO L225 Difference]: With dead ends: 468 [2023-12-21 03:14:34,822 INFO L226 Difference]: Without dead ends: 465 [2023-12-21 03:14:34,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=605, Invalid=9270, Unknown=33, NotChecked=394, Total=10302 [2023-12-21 03:14:34,823 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 419 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 145 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 4658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-12-21 03:14:34,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1236 Invalid, 4658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 4506 Invalid, 7 Unknown, 0 Unchecked, 24.8s Time] [2023-12-21 03:14:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-12-21 03:14:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 372. [2023-12-21 03:14:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 306 states have (on average 1.1470588235294117) internal successors, (351), 326 states have internal predecessors, (351), 38 states have call successors, (38), 25 states have call predecessors, (38), 27 states have return successors, (34), 20 states have call predecessors, (34), 31 states have call successors, (34) [2023-12-21 03:14:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 423 transitions. [2023-12-21 03:14:34,940 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 423 transitions. Word has length 65 [2023-12-21 03:14:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:14:34,940 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 423 transitions. [2023-12-21 03:14:34,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 43 states have (on average 2.488372093023256) internal successors, (107), 52 states have internal predecessors, (107), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 03:14:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 423 transitions. [2023-12-21 03:14:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-21 03:14:34,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:14:34,941 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:14:34,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 03:14:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 03:14:35,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:14:35,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:14:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1534288955, now seen corresponding path program 2 times [2023-12-21 03:14:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:14:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482439827] [2023-12-21 03:14:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:14:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:14:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:14:40,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 03:14:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:14:40,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 03:14:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:14:41,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 03:14:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:14:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 03:14:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:14:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:14:43,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:14:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482439827] [2023-12-21 03:14:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482439827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:14:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659288918] [2023-12-21 03:14:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:14:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:14:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:14:43,044 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) [2023-12-21 03:14:43,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 03:14:43,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:14:43,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:14:43,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 179 conjunts are in the unsatisfiable core [2023-12-21 03:14:43,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:14:43,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-12-21 03:14:43,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:14:44,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:14:44,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-21 03:14:45,090 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 9 treesize of output 3 [2023-12-21 03:14:45,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:14:45,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:14:46,389 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-12-21 03:14:46,389 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 1 case distinctions, treesize of input 19 treesize of output 19 [2023-12-21 03:14:47,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 03:14:47,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 03:14:47,658 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 24 treesize of output 16 [2023-12-21 03:14:48,967 INFO L349 Elim1Store]: treesize reduction 50, result has 35.1 percent of original size [2023-12-21 03:14:48,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 112 [2023-12-21 03:14:49,169 INFO L349 Elim1Store]: treesize reduction 50, result has 35.1 percent of original size [2023-12-21 03:14:49,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 112 [2023-12-21 03:14:49,193 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 20 treesize of output 19 [2023-12-21 03:14:49,218 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 20 treesize of output 19 [2023-12-21 03:14:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:14:49,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 1 [2023-12-21 03:14:49,314 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 20 treesize of output 19 [2023-12-21 03:14:49,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:14:49,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:14:49,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2023-12-21 03:14:49,462 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 13 treesize of output 7 [2023-12-21 03:14:49,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 20 [2023-12-21 03:14:49,809 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 13 treesize of output 7 [2023-12-21 03:14:50,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 31 [2023-12-21 03:14:50,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 03:14:51,402 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 62 treesize of output 46 [2023-12-21 03:14:51,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-12-21 03:14:59,150 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:14:59,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 03:15:00,204 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-12-21 03:15:00,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 108 [2023-12-21 03:15:06,927 INFO L349 Elim1Store]: treesize reduction 238, result has 56.3 percent of original size [2023-12-21 03:15:06,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 379 treesize of output 646 Received shutdown request... [2023-12-21 03:15:10,642 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 03:15:10,642 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 03:15:10,644 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 03:15:10,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-21 03:15:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 03:15:10,852 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-41-7-2-1 context. [2023-12-21 03:15:10,855 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:15:10,857 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 03:15:10,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:15:10 BoogieIcfgContainer [2023-12-21 03:15:10,858 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 03:15:10,858 INFO L158 Benchmark]: Toolchain (without parser) took 858063.84ms. Allocated memory was 185.6MB in the beginning and 502.3MB in the end (delta: 316.7MB). Free memory was 137.9MB in the beginning and 359.9MB in the end (delta: -222.0MB). Peak memory consumption was 297.9MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,858 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 03:15:10,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.17ms. Allocated memory is still 185.6MB. Free memory was 137.3MB in the beginning and 118.8MB in the end (delta: 18.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,859 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.58ms. Allocated memory is still 185.6MB. Free memory was 118.8MB in the beginning and 116.3MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,859 INFO L158 Benchmark]: Boogie Preprocessor took 51.23ms. Allocated memory is still 185.6MB. Free memory was 116.3MB in the beginning and 111.5MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,859 INFO L158 Benchmark]: RCFGBuilder took 428.71ms. Allocated memory is still 185.6MB. Free memory was 111.1MB in the beginning and 152.5MB in the end (delta: -41.4MB). Peak memory consumption was 27.7MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,859 INFO L158 Benchmark]: TraceAbstraction took 857213.64ms. Allocated memory was 185.6MB in the beginning and 502.3MB in the end (delta: 316.7MB). Free memory was 151.5MB in the beginning and 359.9MB in the end (delta: -208.4MB). Peak memory consumption was 310.1MB. Max. memory is 8.0GB. [2023-12-21 03:15:10,860 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 332.17ms. Allocated memory is still 185.6MB. Free memory was 137.3MB in the beginning and 118.8MB in the end (delta: 18.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.58ms. Allocated memory is still 185.6MB. Free memory was 118.8MB in the beginning and 116.3MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 51.23ms. Allocated memory is still 185.6MB. Free memory was 116.3MB in the beginning and 111.5MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 428.71ms. Allocated memory is still 185.6MB. Free memory was 111.1MB in the beginning and 152.5MB in the end (delta: -41.4MB). Peak memory consumption was 27.7MB. Max. memory is 8.0GB. * TraceAbstraction took 857213.64ms. Allocated memory was 185.6MB in the beginning and 502.3MB in the end (delta: 316.7MB). Free memory was 151.5MB in the beginning and 359.9MB in the end (delta: -208.4MB). Peak memory consumption was 310.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 565]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 565). Cancelled while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-41-7-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 857.2s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 574.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 mSolverCounterUnknown, 4482 SdHoareTripleChecker+Valid, 473.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4417 mSDsluCounter, 15292 SdHoareTripleChecker+Invalid, 466.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2186 IncrementalHoareTripleChecker+Unchecked, 14332 mSDsCounter, 1394 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34057 IncrementalHoareTripleChecker+Invalid, 37745 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1394 mSolverCounterUnsat, 960 mSDtfsCounter, 34057 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1904 GetRequests, 1006 SyntacticMatches, 19 SemanticMatches, 879 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 11879 ImplicationChecksByTransitivity, 262.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=372occurred in iteration=17, InterpolantAutomatonStates: 400, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 980 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 235.6s InterpolantComputationTime, 1576 NumberOfCodeBlocks, 1576 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1719 ConstructedInterpolants, 314 QuantifiedInterpolants, 55889 SizeOfPredicates, 549 NumberOfNonLiveVariables, 8005 ConjunctsInSsa, 1918 ConjunctsInUnsatCore, 37 InterpolantComputations, 1 PerfectInterpolantSequences, 362/860 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown