/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 true -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 [2023-12-19 16:29:59,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 16:29:59,826 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 16:29:59,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 16:29:59,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 16:29:59,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 16:29:59,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 16:29:59,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 16:29:59,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 16:29:59,853 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 16:29:59,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 16:29:59,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 16:29:59,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 16:29:59,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 16:29:59,855 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 16:29:59,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 16:29:59,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 16:29:59,856 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 16:29:59,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 16:29:59,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 16:29:59,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 16:29:59,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 16:29:59,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 16:29:59,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 16:29:59,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 16:29:59,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 16:29:59,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 16:29:59,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 16:29:59,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 16:29:59,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 16:29:59,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 16:29:59,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 16:29:59,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 16:30:00,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 16:30:00,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 16:30:00,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 16:30:00,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 16:30:00,063 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 16:30:00,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-19 16:30:01,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 16:30:01,222 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 16:30:01,222 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-19 16:30:01,231 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977389c82/986798ba1ac14a8bab82d59c35359ce7/FLAG5154152e2 [2023-12-19 16:30:01,241 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977389c82/986798ba1ac14a8bab82d59c35359ce7 [2023-12-19 16:30:01,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 16:30:01,245 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 16:30:01,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 16:30:01,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 16:30:01,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 16:30:01,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7c2f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01, skipping insertion in model container [2023-12-19 16:30:01,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,290 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 16:30:01,454 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] [2023-12-19 16:30:01,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 16:30:01,483 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 16:30:01,525 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] [2023-12-19 16:30:01,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 16:30:01,555 INFO L206 MainTranslator]: Completed translation [2023-12-19 16:30:01,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01 WrapperNode [2023-12-19 16:30:01,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 16:30:01,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 16:30:01,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 16:30:01,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 16:30:01,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,596 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 207 [2023-12-19 16:30:01,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 16:30:01,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 16:30:01,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 16:30:01,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 16:30:01,609 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,612 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,656 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 6, 8, 8, 18]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 10 writes are split as follows [0, 1, 1, 1, 7]. [2023-12-19 16:30:01,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 16:30:01,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 16:30:01,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 16:30:01,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 16:30:01,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (1/1) ... [2023-12-19 16:30:01,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 16:30:01,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:30:01,710 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) [2023-12-19 16:30:01,717 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 [2023-12-19 16:30:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-12-19 16:30:01,737 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-12-19 16:30:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-19 16:30:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-12-19 16:30:01,739 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-12-19 16:30:01,739 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-12-19 16:30:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-12-19 16:30:01,740 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-12-19 16:30:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 16:30:01,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 16:30:01,843 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 16:30:01,845 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 16:30:02,118 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 16:30:02,153 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 16:30:02,153 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-12-19 16:30:02,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 04:30:02 BoogieIcfgContainer [2023-12-19 16:30:02,154 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 16:30:02,155 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 16:30:02,155 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 16:30:02,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 16:30:02,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 04:30:01" (1/3) ... [2023-12-19 16:30:02,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c8fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 04:30:02, skipping insertion in model container [2023-12-19 16:30:02,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:30:01" (2/3) ... [2023-12-19 16:30:02,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c8fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 04:30:02, skipping insertion in model container [2023-12-19 16:30:02,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 04:30:02" (3/3) ... [2023-12-19 16:30:02,164 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-12-19 16:30:02,176 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 16:30:02,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 16:30:02,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 16:30:02,214 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;@1e454f80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 16:30:02,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 16:30:02,217 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) [2023-12-19 16:30:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 16:30:02,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:02,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:30:02,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:02,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1056251351, now seen corresponding path program 1 times [2023-12-19 16:30:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:02,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443435300] [2023-12-19 16:30:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 16:30:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:30:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443435300] [2023-12-19 16:30:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443435300] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 16:30:02,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 16:30:02,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 16:30:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895643082] [2023-12-19 16:30:02,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 16:30:02,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 16:30:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:30:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 16:30:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 16:30:02,432 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) [2023-12-19 16:30:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:30:02,472 INFO L93 Difference]: Finished difference Result 177 states and 315 transitions. [2023-12-19 16:30:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 16:30:02,474 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 [2023-12-19 16:30:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:30:02,478 INFO L225 Difference]: With dead ends: 177 [2023-12-19 16:30:02,478 INFO L226 Difference]: Without dead ends: 84 [2023-12-19 16:30:02,481 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 [2023-12-19 16:30:02,483 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 [2023-12-19 16:30:02,484 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] [2023-12-19 16:30:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-19 16:30:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-19 16:30:02,525 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) [2023-12-19 16:30:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-12-19 16:30:02,534 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 14 [2023-12-19 16:30:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:30:02,535 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-12-19 16:30:02,535 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) [2023-12-19 16:30:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-12-19 16:30:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 16:30:02,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:02,537 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] [2023-12-19 16:30:02,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 16:30:02,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:02,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1538349061, now seen corresponding path program 1 times [2023-12-19 16:30:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781952246] [2023-12-19 16:30:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:03,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:30:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:03,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:30:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:30:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:30:03,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:30:03,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781952246] [2023-12-19 16:30:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781952246] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918211357] [2023-12-19 16:30:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:03,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:30:03,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:30:03,322 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) [2023-12-19 16:30:03,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 16:30:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:03,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-19 16:30:03,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:30:03,665 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 [2023-12-19 16:30:03,726 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 [2023-12-19 16:30:03,729 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 [2023-12-19 16:30:03,808 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 16 treesize of output 8 [2023-12-19 16:30:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 16:30:03,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:30:03,841 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 [2023-12-19 16:30:03,934 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 [2023-12-19 16:30:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:30:03,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918211357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 16:30:03,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 16:30:03,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-12-19 16:30:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665176154] [2023-12-19 16:30:03,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 16:30:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 16:30:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:30:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 16:30:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-12-19 16:30:03,967 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) [2023-12-19 16:30:07,984 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] [2023-12-19 16:30:11,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:16,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:20,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:24,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:28,095 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] [2023-12-19 16:30:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:30:28,542 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-12-19 16:30:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 16:30:28,542 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 [2023-12-19 16:30:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:30:28,545 INFO L225 Difference]: With dead ends: 109 [2023-12-19 16:30:28,545 INFO L226 Difference]: Without dead ends: 106 [2023-12-19 16:30:28,546 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 [2023-12-19 16:30:28,546 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 45 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s 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 [2023-12-19 16:30:28,547 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] [2023-12-19 16:30:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-19 16:30:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-12-19 16:30:28,582 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) [2023-12-19 16:30:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-12-19 16:30:28,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 32 [2023-12-19 16:30:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:30:28,585 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-12-19 16:30:28,585 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) [2023-12-19 16:30:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-12-19 16:30:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 16:30:28,585 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:28,585 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] [2023-12-19 16:30:28,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 16:30:28,790 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 [2023-12-19 16:30:28,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:28,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 877821295, now seen corresponding path program 1 times [2023-12-19 16:30:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:28,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378790770] [2023-12-19 16:30:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:29,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:30:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:29,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:30:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:29,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:30:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:30:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:30:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378790770] [2023-12-19 16:30:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378790770] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471190354] [2023-12-19 16:30:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:29,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:30:29,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:30:29,227 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) [2023-12-19 16:30:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 16:30:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:29,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-19 16:30:29,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:30:29,434 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 [2023-12-19 16:30:29,487 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 [2023-12-19 16:30:29,493 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 [2023-12-19 16:30:29,608 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 [2023-12-19 16:30:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 16:30:29,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:30:29,637 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 [2023-12-19 16:30:29,690 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 30 treesize of output 26 [2023-12-19 16:30:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:30:29,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471190354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 16:30:29,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 16:30:29,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-12-19 16:30:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751343509] [2023-12-19 16:30:29,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 16:30:29,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 16:30:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:30:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 16:30:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-12-19 16:30:29,702 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) [2023-12-19 16:30:33,716 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] [2023-12-19 16:30:37,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:41,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:45,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:49,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:30:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:30:50,269 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2023-12-19 16:30:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 16:30:50,269 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 [2023-12-19 16:30:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:30:50,273 INFO L225 Difference]: With dead ends: 112 [2023-12-19 16:30:50,273 INFO L226 Difference]: Without dead ends: 109 [2023-12-19 16:30:50,273 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 [2023-12-19 16:30:50,277 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 [2023-12-19 16:30:50,279 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] [2023-12-19 16:30:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-19 16:30:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-12-19 16:30:50,294 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) [2023-12-19 16:30:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2023-12-19 16:30:50,295 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 34 [2023-12-19 16:30:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:30:50,295 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-12-19 16:30:50,295 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) [2023-12-19 16:30:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2023-12-19 16:30:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 16:30:50,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:50,296 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] [2023-12-19 16:30:50,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 16:30:50,502 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 [2023-12-19 16:30:50,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:50,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:50,503 INFO L85 PathProgramCache]: Analyzing trace with hash 822846683, now seen corresponding path program 1 times [2023-12-19 16:30:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571546930] [2023-12-19 16:30:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:30:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:30:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:30:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:30:51,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:30:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571546930] [2023-12-19 16:30:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571546930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019486780] [2023-12-19 16:30:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:51,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:30:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:30:51,438 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) [2023-12-19 16:30:51,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 16:30:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:51,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-19 16:30:51,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:30:51,646 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 [2023-12-19 16:30:51,727 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 [2023-12-19 16:30:51,744 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 [2023-12-19 16:30:51,754 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 [2023-12-19 16:30:51,756 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 [2023-12-19 16:30:51,787 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 [2023-12-19 16:30:51,850 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 [2023-12-19 16:30:51,853 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 [2023-12-19 16:30:51,855 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 [2023-12-19 16:30:51,857 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 [2023-12-19 16:30:51,909 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 16 treesize of output 4 [2023-12-19 16:30:51,911 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 [2023-12-19 16:30:51,939 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-19 16:30:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:30:51,946 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 [2023-12-19 16:30:51,953 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:30:51,953 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 [2023-12-19 16:30:51,984 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 [2023-12-19 16:30:51,986 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 [2023-12-19 16:30:51,995 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 [2023-12-19 16:30:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-19 16:30:51,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:30:52,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019486780] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:52,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:30:52,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 27 [2023-12-19 16:30:52,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462271014] [2023-12-19 16:30:52,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:30:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 16:30:52,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:30:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 16:30:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=628, Unknown=2, NotChecked=50, Total=756 [2023-12-19 16:30:52,065 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) [2023-12-19 16:30:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:30:52,942 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2023-12-19 16:30:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 16:30:52,943 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 [2023-12-19 16:30:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:30:52,944 INFO L225 Difference]: With dead ends: 175 [2023-12-19 16:30:52,944 INFO L226 Difference]: Without dead ends: 172 [2023-12-19 16:30:52,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1239, Unknown=2, NotChecked=72, Total=1482 [2023-12-19 16:30:52,946 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 265 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 16:30:52,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 598 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1294 Invalid, 0 Unknown, 189 Unchecked, 0.6s Time] [2023-12-19 16:30:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-19 16:30:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2023-12-19 16:30:52,964 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) [2023-12-19 16:30:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2023-12-19 16:30:52,965 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 38 [2023-12-19 16:30:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:30:52,965 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2023-12-19 16:30:52,965 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) [2023-12-19 16:30:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2023-12-19 16:30:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 16:30:52,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:52,967 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] [2023-12-19 16:30:52,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 16:30:53,173 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 [2023-12-19 16:30:53,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:53,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1779369084, now seen corresponding path program 1 times [2023-12-19 16:30:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56598932] [2023-12-19 16:30:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:30:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:30:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:30:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 16:30:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:30:54,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:30:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56598932] [2023-12-19 16:30:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56598932] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767507135] [2023-12-19 16:30:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:30:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:30:54,554 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) [2023-12-19 16:30:54,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 16:30:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:30:54,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-19 16:30:54,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:30:54,777 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 [2023-12-19 16:30:54,854 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 [2023-12-19 16:30:54,857 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 [2023-12-19 16:30:54,906 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 [2023-12-19 16:30:54,954 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 [2023-12-19 16:30:54,957 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 [2023-12-19 16:30:54,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:30:54,968 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 [2023-12-19 16:30:55,134 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 [2023-12-19 16:30:55,137 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 [2023-12-19 16:30:55,149 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 [2023-12-19 16:30:55,194 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 [2023-12-19 16:30:55,199 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 [2023-12-19 16:30:55,202 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 [2023-12-19 16:30:55,302 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8| Int)) (= 0 (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12| Int)) (= 0 (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12|) 0)))) is different from true [2023-12-19 16:30:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:30:55,351 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 [2023-12-19 16:30:55,361 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:30:55,362 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 [2023-12-19 16:30:55,365 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 [2023-12-19 16:30:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-19 16:30:55,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:30:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767507135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:30:56,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:30:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 34 [2023-12-19 16:30:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503484930] [2023-12-19 16:30:56,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:30:56,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 16:30:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:30:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 16:30:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1406, Unknown=1, NotChecked=76, Total=1640 [2023-12-19 16:30:56,351 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 30 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 16:30:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:30:59,320 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2023-12-19 16:30:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 16:30:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 30 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 42 [2023-12-19 16:30:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:30:59,326 INFO L225 Difference]: With dead ends: 266 [2023-12-19 16:30:59,326 INFO L226 Difference]: Without dead ends: 263 [2023-12-19 16:30:59,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=476, Invalid=3949, Unknown=1, NotChecked=130, Total=4556 [2023-12-19 16:30:59,328 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 496 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 16:30:59,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 580 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1539 Invalid, 0 Unknown, 286 Unchecked, 1.7s Time] [2023-12-19 16:30:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-19 16:30:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 128. [2023-12-19 16:30:59,348 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) [2023-12-19 16:30:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 152 transitions. [2023-12-19 16:30:59,348 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 152 transitions. Word has length 42 [2023-12-19 16:30:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:30:59,349 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 152 transitions. [2023-12-19 16:30:59,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 30 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 16:30:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 152 transitions. [2023-12-19 16:30:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 16:30:59,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:30:59,350 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] [2023-12-19 16:30:59,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-19 16:30:59,556 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 [2023-12-19 16:30:59,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:30:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:30:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2133715017, now seen corresponding path program 1 times [2023-12-19 16:30:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:30:59,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811582923] [2023-12-19 16:30:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:30:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:30:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:00,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:00,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 16:31:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:00,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811582923] [2023-12-19 16:31:00,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811582923] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:00,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4309996] [2023-12-19 16:31:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:00,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:00,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:00,549 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) [2023-12-19 16:31:00,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 16:31:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:00,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-19 16:31:00,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:00,789 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 [2023-12-19 16:31:00,792 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 [2023-12-19 16:31:00,885 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 [2023-12-19 16:31:00,898 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 [2023-12-19 16:31:00,937 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 [2023-12-19 16:31:00,966 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 [2023-12-19 16:31:01,025 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 [2023-12-19 16:31:01,029 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 16 treesize of output 1 [2023-12-19 16:31:01,035 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 [2023-12-19 16:31:01,038 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 [2023-12-19 16:31:01,094 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 [2023-12-19 16:31:01,109 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 [2023-12-19 16:31:01,212 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 [2023-12-19 16:31:01,215 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 [2023-12-19 16:31:01,218 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 [2023-12-19 16:31:01,225 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 [2023-12-19 16:31:01,308 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 [2023-12-19 16:31:01,311 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 [2023-12-19 16:31:01,313 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 [2023-12-19 16:31:01,422 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_12| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_12|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_11| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_11|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2023-12-19 16:31:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:01,440 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 [2023-12-19 16:31:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:01,445 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 [2023-12-19 16:31:01,451 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:31:01,451 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 [2023-12-19 16:31:01,565 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 42 treesize of output 30 [2023-12-19 16:31:01,571 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 [2023-12-19 16:31:01,574 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 [2023-12-19 16:31:01,714 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 [2023-12-19 16:31:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-19 16:31:01,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4309996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:01,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2023-12-19 16:31:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563557168] [2023-12-19 16:31:01,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 16:31:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 16:31:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1034, Unknown=1, NotChecked=64, Total=1190 [2023-12-19 16:31:01,891 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) [2023-12-19 16:31:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:03,795 INFO L93 Difference]: Finished difference Result 291 states and 348 transitions. [2023-12-19 16:31:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 16:31:03,795 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 [2023-12-19 16:31:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:03,797 INFO L225 Difference]: With dead ends: 291 [2023-12-19 16:31:03,797 INFO L226 Difference]: Without dead ends: 221 [2023-12-19 16:31:03,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=2322, Unknown=1, NotChecked=98, Total=2652 [2023-12-19 16:31:03,800 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 332 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:03,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 605 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1464 Invalid, 0 Unknown, 210 Unchecked, 1.2s Time] [2023-12-19 16:31:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-19 16:31:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2023-12-19 16:31:03,844 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) [2023-12-19 16:31:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2023-12-19 16:31:03,845 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 42 [2023-12-19 16:31:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:03,845 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2023-12-19 16:31:03,845 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) [2023-12-19 16:31:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2023-12-19 16:31:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 16:31:03,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:03,846 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] [2023-12-19 16:31:03,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:04,051 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 [2023-12-19 16:31:04,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:04,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1367321695, now seen corresponding path program 1 times [2023-12-19 16:31:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143373272] [2023-12-19 16:31:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:04,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:04,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:05,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143373272] [2023-12-19 16:31:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143373272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957255023] [2023-12-19 16:31:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:05,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:05,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:05,289 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) [2023-12-19 16:31:05,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 16:31:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:05,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-19 16:31:05,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:05,530 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 [2023-12-19 16:31:05,594 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 [2023-12-19 16:31:05,628 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 [2023-12-19 16:31:05,631 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 [2023-12-19 16:31:05,635 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 [2023-12-19 16:31:05,668 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 [2023-12-19 16:31:05,725 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 [2023-12-19 16:31:05,728 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 [2023-12-19 16:31:05,730 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 [2023-12-19 16:31:05,733 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 28 treesize of output 20 [2023-12-19 16:31:05,760 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 [2023-12-19 16:31:05,762 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 [2023-12-19 16:31:05,814 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-19 16:31:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:05,820 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 [2023-12-19 16:31:05,831 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-19 16:31:05,831 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 [2023-12-19 16:31:05,846 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 [2023-12-19 16:31:05,848 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 [2023-12-19 16:31:05,875 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-19 16:31:05,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:05,882 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 [2023-12-19 16:31:05,887 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:31:05,887 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 [2023-12-19 16:31:05,920 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 [2023-12-19 16:31:05,922 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 [2023-12-19 16:31:05,930 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 [2023-12-19 16:31:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 5 not checked. [2023-12-19 16:31:05,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:06,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957255023] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:06,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:06,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 34 [2023-12-19 16:31:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114405199] [2023-12-19 16:31:06,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 16:31:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 16:31:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=964, Unknown=2, NotChecked=126, Total=1190 [2023-12-19 16:31:06,003 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 34 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 29 states have internal predecessors, (59), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 16:31:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:07,211 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2023-12-19 16:31:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 16:31:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 29 states have internal predecessors, (59), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2023-12-19 16:31:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:07,212 INFO L225 Difference]: With dead ends: 203 [2023-12-19 16:31:07,212 INFO L226 Difference]: Without dead ends: 200 [2023-12-19 16:31:07,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=1621, Unknown=2, NotChecked=166, Total=1980 [2023-12-19 16:31:07,213 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 290 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:07,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 785 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1581 Invalid, 0 Unknown, 330 Unchecked, 0.8s Time] [2023-12-19 16:31:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-12-19 16:31:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2023-12-19 16:31:07,238 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) [2023-12-19 16:31:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2023-12-19 16:31:07,240 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 45 [2023-12-19 16:31:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:07,241 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2023-12-19 16:31:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 29 states have internal predecessors, (59), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 16:31:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2023-12-19 16:31:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 16:31:07,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:07,245 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] [2023-12-19 16:31:07,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:07,453 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 [2023-12-19 16:31:07,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:07,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash 651148237, now seen corresponding path program 1 times [2023-12-19 16:31:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102805762] [2023-12-19 16:31:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:08,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:08,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 16:31:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:31:08,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:08,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102805762] [2023-12-19 16:31:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102805762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:08,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164894779] [2023-12-19 16:31:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:08,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:08,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:08,885 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) [2023-12-19 16:31:08,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 16:31:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:09,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-19 16:31:09,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:09,170 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 [2023-12-19 16:31:09,216 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 26 treesize of output 27 [2023-12-19 16:31:09,227 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 26 treesize of output 27 [2023-12-19 16:31:09,275 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 [2023-12-19 16:31:09,290 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 [2023-12-19 16:31:09,373 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 [2023-12-19 16:31:09,390 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 [2023-12-19 16:31:09,392 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 41 [2023-12-19 16:31:09,438 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 [2023-12-19 16:31:09,440 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 [2023-12-19 16:31:09,442 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 [2023-12-19 16:31:09,533 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_14| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_14|) 0) 0))) is different from true [2023-12-19 16:31:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:09,544 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 31 treesize of output 20 [2023-12-19 16:31:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:09,547 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 31 treesize of output 20 [2023-12-19 16:31:09,560 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-12-19 16:31:09,560 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 [2023-12-19 16:31:09,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-12-19 16:31:09,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-12-19 16:31:09,687 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 [2023-12-19 16:31:09,764 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_14| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_14|) 0) 0))) is different from true [2023-12-19 16:31:09,801 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-12-19 16:31:09,801 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 [2023-12-19 16:31:09,806 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 31 treesize of output 20 [2023-12-19 16:31:09,809 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 31 treesize of output 20 [2023-12-19 16:31:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-12-19 16:31:10,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164894779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:10,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2023-12-19 16:31:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8383837] [2023-12-19 16:31:10,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 16:31:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 16:31:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=771, Unknown=2, NotChecked=114, Total=992 [2023-12-19 16:31:10,315 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 30 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 27 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 16:31:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:13,669 INFO L93 Difference]: Finished difference Result 321 states and 380 transitions. [2023-12-19 16:31:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 16:31:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 27 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2023-12-19 16:31:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:13,671 INFO L225 Difference]: With dead ends: 321 [2023-12-19 16:31:13,671 INFO L226 Difference]: Without dead ends: 318 [2023-12-19 16:31:13,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=197, Invalid=1368, Unknown=3, NotChecked=154, Total=1722 [2023-12-19 16:31:13,672 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 331 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:13,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 526 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1345 Invalid, 0 Unknown, 420 Unchecked, 1.1s Time] [2023-12-19 16:31:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-12-19 16:31:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 257. [2023-12-19 16:31:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 218 states have internal predecessors, (242), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (26), 20 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 16:31:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2023-12-19 16:31:13,716 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 45 [2023-12-19 16:31:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:13,716 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2023-12-19 16:31:13,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 27 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 16:31:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2023-12-19 16:31:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 16:31:13,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:13,720 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] [2023-12-19 16:31:13,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:13,926 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 [2023-12-19 16:31:13,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:13,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1402806206, now seen corresponding path program 1 times [2023-12-19 16:31:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:13,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014310416] [2023-12-19 16:31:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:13,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-19 16:31:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:15,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:15,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014310416] [2023-12-19 16:31:15,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014310416] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:15,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764622252] [2023-12-19 16:31:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:15,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:15,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:15,897 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) [2023-12-19 16:31:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 16:31:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:16,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 145 conjunts are in the unsatisfiable core [2023-12-19 16:31:16,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:16,237 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 [2023-12-19 16:31:16,339 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 [2023-12-19 16:31:16,344 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 [2023-12-19 16:31:16,412 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 [2023-12-19 16:31:16,467 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 [2023-12-19 16:31:16,471 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 [2023-12-19 16:31:16,474 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 30 treesize of output 11 [2023-12-19 16:31:16,477 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 [2023-12-19 16:31:16,653 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 [2023-12-19 16:31:16,656 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 [2023-12-19 16:31:16,664 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 [2023-12-19 16:31:16,725 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 [2023-12-19 16:31:16,728 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 [2023-12-19 16:31:16,730 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 [2023-12-19 16:31:16,858 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_24| Int)) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_24|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_19| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_19|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20|) 0) 0))) is different from true [2023-12-19 16:31:16,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:16,868 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 [2023-12-19 16:31:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:16,872 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 [2023-12-19 16:31:16,884 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-19 16:31:16,884 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 [2023-12-19 16:31:16,976 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 [2023-12-19 16:31:16,979 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 [2023-12-19 16:31:16,982 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 [2023-12-19 16:31:17,096 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_24| Int)) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_24|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_19| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_19|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_20|) 0) 0))) is different from true [2023-12-19 16:31:17,118 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:31:17,118 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 [2023-12-19 16:31:17,122 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 [2023-12-19 16:31:17,126 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 [2023-12-19 16:31:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 5 not checked. [2023-12-19 16:31:17,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764622252] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:18,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2023-12-19 16:31:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202802561] [2023-12-19 16:31:18,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:18,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-19 16:31:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-19 16:31:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2366, Unknown=2, NotChecked=198, Total=2756 [2023-12-19 16:31:18,308 INFO L87 Difference]: Start difference. First operand 257 states and 303 transitions. Second operand has 46 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 41 states have internal predecessors, (74), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:31:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:22,917 INFO L93 Difference]: Finished difference Result 395 states and 470 transitions. [2023-12-19 16:31:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-19 16:31:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 41 states have internal predecessors, (74), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 49 [2023-12-19 16:31:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:22,919 INFO L225 Difference]: With dead ends: 395 [2023-12-19 16:31:22,919 INFO L226 Difference]: Without dead ends: 392 [2023-12-19 16:31:22,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=566, Invalid=6082, Unknown=2, NotChecked=322, Total=6972 [2023-12-19 16:31:22,921 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 394 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:22,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 822 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2293 Invalid, 0 Unknown, 494 Unchecked, 2.6s Time] [2023-12-19 16:31:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-12-19 16:31:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 208. [2023-12-19 16:31:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 175 states have internal predecessors, (190), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (22), 16 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 16:31:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 242 transitions. [2023-12-19 16:31:22,973 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 242 transitions. Word has length 49 [2023-12-19 16:31:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:22,973 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 242 transitions. [2023-12-19 16:31:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 41 states have internal predecessors, (74), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:31:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 242 transitions. [2023-12-19 16:31:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 16:31:22,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:22,974 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] [2023-12-19 16:31:22,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:23,180 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 [2023-12-19 16:31:23,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:23,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1048460273, now seen corresponding path program 1 times [2023-12-19 16:31:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042849903] [2023-12-19 16:31:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:23,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:24,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:24,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 16:31:24,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042849903] [2023-12-19 16:31:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042849903] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582403306] [2023-12-19 16:31:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:24,434 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) [2023-12-19 16:31:24,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 16:31:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:24,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 147 conjunts are in the unsatisfiable core [2023-12-19 16:31:24,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:24,758 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 [2023-12-19 16:31:24,759 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 [2023-12-19 16:31:24,873 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 [2023-12-19 16:31:24,881 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 [2023-12-19 16:31:24,926 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 [2023-12-19 16:31:24,967 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 [2023-12-19 16:31:25,017 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 [2023-12-19 16:31:25,022 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 [2023-12-19 16:31:25,024 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 [2023-12-19 16:31:25,027 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 [2023-12-19 16:31:25,101 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 [2023-12-19 16:31:25,108 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 [2023-12-19 16:31:25,233 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 [2023-12-19 16:31:25,235 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 [2023-12-19 16:31:25,238 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 [2023-12-19 16:31:25,242 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 [2023-12-19 16:31:25,295 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 [2023-12-19 16:31:25,298 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 15 treesize of output 3 [2023-12-19 16:31:25,300 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 [2023-12-19 16:31:25,402 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24|) 0) 0))) is different from true [2023-12-19 16:31:25,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:25,415 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 [2023-12-19 16:31:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:25,418 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 [2023-12-19 16:31:25,430 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-12-19 16:31:25,430 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 [2023-12-19 16:31:25,502 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 [2023-12-19 16:31:25,505 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 [2023-12-19 16:31:25,506 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 [2023-12-19 16:31:25,597 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2023-12-19 16:31:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:25,609 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 [2023-12-19 16:31:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:25,613 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 [2023-12-19 16:31:25,620 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:31:25,621 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 [2023-12-19 16:31:25,738 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 [2023-12-19 16:31:25,741 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 [2023-12-19 16:31:25,745 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 [2023-12-19 16:31:25,859 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 [2023-12-19 16:31:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 5 not checked. [2023-12-19 16:31:25,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:26,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582403306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:26,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:26,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2023-12-19 16:31:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620849511] [2023-12-19 16:31:26,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:26,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 16:31:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 16:31:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1228, Unknown=2, NotChecked=142, Total=1482 [2023-12-19 16:31:26,046 INFO L87 Difference]: Start difference. First operand 208 states and 242 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) [2023-12-19 16:31:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:28,125 INFO L93 Difference]: Finished difference Result 400 states and 468 transitions. [2023-12-19 16:31:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 16:31:28,125 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 [2023-12-19 16:31:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:28,127 INFO L225 Difference]: With dead ends: 400 [2023-12-19 16:31:28,127 INFO L226 Difference]: Without dead ends: 317 [2023-12-19 16:31:28,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=2600, Unknown=2, NotChecked=210, Total=3080 [2023-12-19 16:31:28,128 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 260 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:28,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 834 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1861 Invalid, 0 Unknown, 416 Unchecked, 1.4s Time] [2023-12-19 16:31:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-19 16:31:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 206. [2023-12-19 16:31:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 173 states have internal predecessors, (190), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-19 16:31:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 238 transitions. [2023-12-19 16:31:28,171 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 238 transitions. Word has length 49 [2023-12-19 16:31:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:28,171 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 238 transitions. [2023-12-19 16:31:28,171 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) [2023-12-19 16:31:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 238 transitions. [2023-12-19 16:31:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 16:31:28,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:28,172 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] [2023-12-19 16:31:28,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:28,380 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 [2023-12-19 16:31:28,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:28,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1130757783, now seen corresponding path program 1 times [2023-12-19 16:31:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:28,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460135738] [2023-12-19 16:31:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:28,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:29,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:29,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:29,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:31:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:29,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460135738] [2023-12-19 16:31:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460135738] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548160382] [2023-12-19 16:31:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:29,910 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) [2023-12-19 16:31:29,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 16:31:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:30,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 139 conjunts are in the unsatisfiable core [2023-12-19 16:31:30,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:30,243 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 [2023-12-19 16:31:30,325 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 [2023-12-19 16:31:30,343 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 [2023-12-19 16:31:30,349 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 [2023-12-19 16:31:30,351 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 [2023-12-19 16:31:30,385 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 [2023-12-19 16:31:30,542 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 [2023-12-19 16:31:30,545 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 16 treesize of output 1 [2023-12-19 16:31:30,552 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 [2023-12-19 16:31:30,622 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 [2023-12-19 16:31:30,628 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 [2023-12-19 16:31:30,642 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-19 16:31:30,642 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 [2023-12-19 16:31:30,652 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 37 treesize of output 24 [2023-12-19 16:31:30,743 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 97 treesize of output 69 [2023-12-19 16:31:30,745 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 [2023-12-19 16:31:30,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 68 [2023-12-19 16:31:30,752 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 [2023-12-19 16:31:30,806 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-19 16:31:30,807 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 [2023-12-19 16:31:30,810 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 [2023-12-19 16:31:30,812 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 [2023-12-19 16:31:30,880 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-12-19 16:31:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:30,894 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-19 16:31:30,894 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 [2023-12-19 16:31:30,910 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-19 16:31:30,910 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 [2023-12-19 16:31:30,913 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 [2023-12-19 16:31:30,973 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 [2023-12-19 16:31:30,974 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 [2023-12-19 16:31:31,082 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 [2023-12-19 16:31:31,132 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-19 16:31:31,133 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 [2023-12-19 16:31:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-19 16:31:31,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548160382] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:31,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:31,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 40 [2023-12-19 16:31:31,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438416151] [2023-12-19 16:31:31,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:31,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-19 16:31:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-19 16:31:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1444, Unknown=3, NotChecked=76, Total=1640 [2023-12-19 16:31:31,231 INFO L87 Difference]: Start difference. First operand 206 states and 238 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) [2023-12-19 16:31:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:32,694 INFO L93 Difference]: Finished difference Result 270 states and 317 transitions. [2023-12-19 16:31:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 16:31:32,694 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 [2023-12-19 16:31:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:32,696 INFO L225 Difference]: With dead ends: 270 [2023-12-19 16:31:32,696 INFO L226 Difference]: Without dead ends: 267 [2023-12-19 16:31:32,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=2501, Unknown=3, NotChecked=102, Total=2862 [2023-12-19 16:31:32,697 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 235 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:32,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1310 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2198 Invalid, 0 Unknown, 202 Unchecked, 1.0s Time] [2023-12-19 16:31:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-12-19 16:31:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 214. [2023-12-19 16:31:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 181 states have internal predecessors, (200), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-19 16:31:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2023-12-19 16:31:32,754 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 49 [2023-12-19 16:31:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:32,754 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2023-12-19 16:31:32,755 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) [2023-12-19 16:31:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2023-12-19 16:31:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-19 16:31:32,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:32,755 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, 1, 1, 1] [2023-12-19 16:31:32,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:32,960 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 [2023-12-19 16:31:32,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:32,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1402305919, now seen corresponding path program 1 times [2023-12-19 16:31:32,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:32,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157052055] [2023-12-19 16:31:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:32,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:33,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-19 16:31:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:34,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:31:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-19 16:31:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:34,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157052055] [2023-12-19 16:31:34,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157052055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278775696] [2023-12-19 16:31:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:34,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:34,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:34,408 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) [2023-12-19 16:31:34,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 16:31:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:34,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-19 16:31:34,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:34,738 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 [2023-12-19 16:31:34,764 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 [2023-12-19 16:31:34,766 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 [2023-12-19 16:31:34,773 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 [2023-12-19 16:31:34,774 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 [2023-12-19 16:31:34,849 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 [2023-12-19 16:31:34,863 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 [2023-12-19 16:31:34,866 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 [2023-12-19 16:31:34,899 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 [2023-12-19 16:31:34,901 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 [2023-12-19 16:31:34,904 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 [2023-12-19 16:31:34,981 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= |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 [2023-12-19 16:31:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:34,989 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 [2023-12-19 16:31:35,003 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-12-19 16:31:35,003 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 [2023-12-19 16:31:35,006 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 [2023-12-19 16:31:35,097 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 [2023-12-19 16:31:35,100 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 [2023-12-19 16:31:35,102 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 [2023-12-19 16:31:35,169 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28|) 0) 0))) is different from true [2023-12-19 16:31:35,193 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-12-19 16:31:35,193 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 [2023-12-19 16:31:35,196 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 [2023-12-19 16:31:35,200 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 20 treesize of output 15 [2023-12-19 16:31:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-12-19 16:31:35,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:35,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278775696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:35,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-12-19 16:31:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116238655] [2023-12-19 16:31:35,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:35,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 16:31:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 16:31:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=879, Unknown=2, NotChecked=122, Total=1122 [2023-12-19 16:31:35,600 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand has 32 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:31:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:37,663 INFO L93 Difference]: Finished difference Result 273 states and 318 transitions. [2023-12-19 16:31:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 16:31:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 52 [2023-12-19 16:31:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:37,665 INFO L225 Difference]: With dead ends: 273 [2023-12-19 16:31:37,665 INFO L226 Difference]: Without dead ends: 270 [2023-12-19 16:31:37,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=1725, Unknown=2, NotChecked=174, Total=2162 [2023-12-19 16:31:37,666 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:37,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 480 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1240 Invalid, 0 Unknown, 350 Unchecked, 1.1s Time] [2023-12-19 16:31:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-12-19 16:31:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 137. [2023-12-19 16:31:37,703 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) [2023-12-19 16:31:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2023-12-19 16:31:37,703 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 52 [2023-12-19 16:31:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:37,704 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2023-12-19 16:31:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:31:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2023-12-19 16:31:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-19 16:31:37,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:37,704 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] [2023-12-19 16:31:37,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:37,911 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 [2023-12-19 16:31:37,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:37,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash -989002747, now seen corresponding path program 2 times [2023-12-19 16:31:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969740369] [2023-12-19 16:31:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:37,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:39,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:39,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:31:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:31:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:40,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969740369] [2023-12-19 16:31:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969740369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216133110] [2023-12-19 16:31:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 16:31:40,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:40,158 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) [2023-12-19 16:31:40,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 16:31:40,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 16:31:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 16:31:40,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 189 conjunts are in the unsatisfiable core [2023-12-19 16:31:40,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:40,564 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 [2023-12-19 16:31:40,566 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 [2023-12-19 16:31:40,674 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 [2023-12-19 16:31:40,680 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 [2023-12-19 16:31:40,728 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 [2023-12-19 16:31:40,774 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 [2023-12-19 16:31:40,835 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 [2023-12-19 16:31:40,838 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 [2023-12-19 16:31:40,847 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 [2023-12-19 16:31:40,851 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 [2023-12-19 16:31:40,921 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 [2023-12-19 16:31:40,936 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 [2023-12-19 16:31:41,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-19 16:31:41,057 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 [2023-12-19 16:31:41,238 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 [2023-12-19 16:31:41,246 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 [2023-12-19 16:31:41,360 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 78 treesize of output 47 [2023-12-19 16:31:41,376 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-19 16:31:41,376 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 [2023-12-19 16:31:41,388 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 44 treesize of output 31 [2023-12-19 16:31:41,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 58 [2023-12-19 16:31:41,398 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 48 treesize of output 35 [2023-12-19 16:31:41,580 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 [2023-12-19 16:31:41,594 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 [2023-12-19 16:31:41,677 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 124 treesize of output 88 [2023-12-19 16:31:41,683 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-12-19 16:31:41,683 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 104 treesize of output 43 [2023-12-19 16:31:41,686 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-19 16:31:41,688 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 [2023-12-19 16:31:41,717 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 [2023-12-19 16:31:41,852 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_33| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_33|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_34| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_34|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_35| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_35|) 0) 0))) is different from true [2023-12-19 16:31:41,868 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 124 treesize of output 88 [2023-12-19 16:31:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:41,876 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-19 16:31:41,877 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 112 treesize of output 95 [2023-12-19 16:31:41,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 87 [2023-12-19 16:31:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:31:41,884 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 75 treesize of output 67 [2023-12-19 16:31:41,895 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-19 16:31:41,895 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 [2023-12-19 16:31:42,011 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 94 treesize of output 66 [2023-12-19 16:31:42,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-12-19 16:31:42,017 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 [2023-12-19 16:31:42,232 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-12-19 16:31:42,232 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 54 treesize of output 25 [2023-12-19 16:31:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-12-19 16:31:42,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216133110] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:42,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:31:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2023-12-19 16:31:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045022808] [2023-12-19 16:31:42,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-19 16:31:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-19 16:31:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2404, Unknown=1, NotChecked=98, Total=2652 [2023-12-19 16:31:42,663 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 45 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 39 states have internal predecessors, (85), 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) [2023-12-19 16:31:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:31:47,569 INFO L93 Difference]: Finished difference Result 312 states and 367 transitions. [2023-12-19 16:31:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 16:31:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 39 states have internal predecessors, (85), 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 53 [2023-12-19 16:31:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:31:47,570 INFO L225 Difference]: With dead ends: 312 [2023-12-19 16:31:47,570 INFO L226 Difference]: Without dead ends: 243 [2023-12-19 16:31:47,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=396, Invalid=4863, Unknown=1, NotChecked=142, Total=5402 [2023-12-19 16:31:47,572 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 203 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 4617 mSolverCounterSat, 71 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 4917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 4617 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-19 16:31:47,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 2042 Invalid, 4917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 4617 Invalid, 4 Unknown, 225 Unchecked, 3.5s Time] [2023-12-19 16:31:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-19 16:31:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2023-12-19 16:31:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 140 states have internal predecessors, (154), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 16:31:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2023-12-19 16:31:47,640 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 53 [2023-12-19 16:31:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:31:47,641 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2023-12-19 16:31:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 39 states have internal predecessors, (85), 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) [2023-12-19 16:31:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2023-12-19 16:31:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-19 16:31:47,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:31:47,641 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] [2023-12-19 16:31:47,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 16:31:47,846 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 [2023-12-19 16:31:47,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:31:47,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:31:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash 725485248, now seen corresponding path program 1 times [2023-12-19 16:31:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:31:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076359510] [2023-12-19 16:31:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:47,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:31:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:31:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:31:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:31:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 16:31:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:31:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:31:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076359510] [2023-12-19 16:31:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076359510] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:31:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110893217] [2023-12-19 16:31:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:31:48,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:31:48,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:31:48,207 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) [2023-12-19 16:31:48,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 16:31:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:31:48,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-19 16:31:48,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:31:48,580 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 [2023-12-19 16:31:48,615 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 [2023-12-19 16:31:48,616 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 [2023-12-19 16:31:48,755 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 16 treesize of output 8 [2023-12-19 16:31:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 16:31:48,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:31:48,829 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 [2023-12-19 16:31:48,888 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 [2023-12-19 16:31:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:31:48,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110893217] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 16:31:48,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 16:31:48,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 22 [2023-12-19 16:31:48,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564231633] [2023-12-19 16:31:48,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 16:31:48,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 16:31:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:31:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 16:31:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-12-19 16:31:48,906 INFO L87 Difference]: Start difference. First operand 165 states and 191 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) [2023-12-19 16:31:52,923 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] [2023-12-19 16:31:56,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:00,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:05,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:09,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:13,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:17,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:32:17,947 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2023-12-19 16:32:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-19 16:32:17,947 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 [2023-12-19 16:32:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:32:17,948 INFO L225 Difference]: With dead ends: 243 [2023-12-19 16:32:17,948 INFO L226 Difference]: Without dead ends: 191 [2023-12-19 16:32:17,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 16:32:17,949 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 40 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2023-12-19 16:32:17,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 617 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1394 Invalid, 7 Unknown, 0 Unchecked, 28.7s Time] [2023-12-19 16:32:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-19 16:32:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2023-12-19 16:32:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 153 states have internal predecessors, (170), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 16:32:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2023-12-19 16:32:17,999 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 55 [2023-12-19 16:32:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:32:17,999 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2023-12-19 16:32:17,999 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) [2023-12-19 16:32:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2023-12-19 16:32:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-19 16:32:18,000 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:32:18,000 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] [2023-12-19 16:32:18,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 16:32:18,206 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 [2023-12-19 16:32:18,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:32:18,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:32:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1319745871, now seen corresponding path program 1 times [2023-12-19 16:32:18,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:32:18,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584623567] [2023-12-19 16:32:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:32:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:32:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:32:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:32:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:32:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 16:32:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:32:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:32:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584623567] [2023-12-19 16:32:19,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584623567] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:32:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203523208] [2023-12-19 16:32:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:32:19,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:32:19,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:32:19,346 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) [2023-12-19 16:32:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 16:32:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:19,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-19 16:32:19,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:32:19,721 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 [2023-12-19 16:32:19,765 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 [2023-12-19 16:32:19,766 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 [2023-12-19 16:32:20,005 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 [2023-12-19 16:32:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:32:20,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:32:20,130 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 [2023-12-19 16:32:20,235 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 [2023-12-19 16:32:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 16:32:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203523208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 16:32:20,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 16:32:20,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 10] total 35 [2023-12-19 16:32:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189396673] [2023-12-19 16:32:20,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 16:32:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-19 16:32:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:32:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-19 16:32:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 16:32:20,246 INFO L87 Difference]: Start difference. First operand 179 states and 207 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) [2023-12-19 16:32:24,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:28,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:32,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:36,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 16:32:40,711 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] [2023-12-19 16:32:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:32:43,053 INFO L93 Difference]: Finished difference Result 337 states and 394 transitions. [2023-12-19 16:32:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-19 16:32:43,053 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 [2023-12-19 16:32:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:32:43,054 INFO L225 Difference]: With dead ends: 337 [2023-12-19 16:32:43,055 INFO L226 Difference]: Without dead ends: 273 [2023-12-19 16:32:43,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=387, Invalid=4305, Unknown=0, NotChecked=0, Total=4692 [2023-12-19 16:32:43,058 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 268 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 76 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2023-12-19 16:32:43,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 960 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2197 Invalid, 5 Unknown, 0 Unchecked, 21.6s Time] [2023-12-19 16:32:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-19 16:32:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 234. [2023-12-19 16:32:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 191 states have (on average 1.162303664921466) internal successors, (222), 203 states have internal predecessors, (222), 26 states have call successors, (26), 15 states have call predecessors, (26), 16 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) [2023-12-19 16:32:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 269 transitions. [2023-12-19 16:32:43,171 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 269 transitions. Word has length 59 [2023-12-19 16:32:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:32:43,171 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 269 transitions. [2023-12-19 16:32:43,171 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) [2023-12-19 16:32:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 269 transitions. [2023-12-19 16:32:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-19 16:32:43,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:32:43,172 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:32:43,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-19 16:32:43,381 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 [2023-12-19 16:32:43,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:32:43,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:32:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash 561502831, now seen corresponding path program 1 times [2023-12-19 16:32:43,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:32:43,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368360369] [2023-12-19 16:32:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:32:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:32:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:45,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:32:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:32:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:45,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:32:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:45,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-19 16:32:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 16:32:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 16:32:46,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:32:46,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368360369] [2023-12-19 16:32:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368360369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:32:46,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564187849] [2023-12-19 16:32:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:32:46,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:32:46,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:32:46,104 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) [2023-12-19 16:32:46,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 16:32:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:32:46,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 239 conjunts are in the unsatisfiable core [2023-12-19 16:32:46,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:32:46,625 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 [2023-12-19 16:32:46,627 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 [2023-12-19 16:32:46,735 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 [2023-12-19 16:32:46,741 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 [2023-12-19 16:32:46,794 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 [2023-12-19 16:32:46,855 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 [2023-12-19 16:32:46,958 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 [2023-12-19 16:32:46,961 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 [2023-12-19 16:32:46,967 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 [2023-12-19 16:32:46,970 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 [2023-12-19 16:32:47,058 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 [2023-12-19 16:32:47,074 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 [2023-12-19 16:32:47,228 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 [2023-12-19 16:32:47,232 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 [2023-12-19 16:32:47,412 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 [2023-12-19 16:32:47,425 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 [2023-12-19 16:32:47,582 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 66 treesize of output 35 [2023-12-19 16:32:47,596 INFO L349 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2023-12-19 16:32:47,596 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 32 treesize of output 35 [2023-12-19 16:32:47,614 INFO L349 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2023-12-19 16:32:47,614 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 39 [2023-12-19 16:32:47,623 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 [2023-12-19 16:32:47,642 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-12-19 16:32:47,642 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 [2023-12-19 16:32:47,672 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 [2023-12-19 16:32:47,865 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 [2023-12-19 16:32:47,878 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 [2023-12-19 16:32:47,882 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 11 [2023-12-19 16:32:47,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 63 [2023-12-19 16:32:48,004 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-19 16:32:48,005 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 64 treesize of output 31 [2023-12-19 16:32:48,010 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 19 treesize of output 7 [2023-12-19 16:32:48,014 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 [2023-12-19 16:32:48,223 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 [2023-12-19 16:32:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:32:49,702 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-19 16:32:49,702 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 72 treesize of output 55 [2023-12-19 16:32:49,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:32:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:32:49,712 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 35 treesize of output 33 [2023-12-19 16:32:49,744 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-12-19 16:32:49,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-12-19 16:32:50,055 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-19 16:32:50,056 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 64 treesize of output 31 [2023-12-19 16:32:50,063 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 [2023-12-19 16:32:50,067 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 19 treesize of output 7 [2023-12-19 16:32:50,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2023-12-19 16:32:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:32:59,148 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-19 16:32:59,149 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 72 treesize of output 55 [2023-12-19 16:32:59,248 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-12-19 16:32:59,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-12-19 16:32:59,273 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 35 treesize of output 33 [2023-12-19 16:33:00,508 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 89 treesize of output 57 [2023-12-19 16:33:00,591 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 [2023-12-19 16:33:02,866 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-19 16:33:02,866 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2023-12-19 16:33:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 16:33:03,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:33:05,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:33:05,071 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 110 treesize of output 100 [2023-12-19 16:33:05,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564187849] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:33:05,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:33:05,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 49 [2023-12-19 16:33:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005736942] [2023-12-19 16:33:05,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:33:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-19 16:33:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:33:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-19 16:33:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2771, Unknown=3, NotChecked=0, Total=2970 [2023-12-19 16:33:05,507 INFO L87 Difference]: Start difference. First operand 234 states and 269 transitions. Second operand has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 42 states have internal predecessors, (90), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:33:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:33:24,776 INFO L93 Difference]: Finished difference Result 373 states and 426 transitions. [2023-12-19 16:33:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 16:33:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 42 states have internal predecessors, (90), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 60 [2023-12-19 16:33:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:33:24,778 INFO L225 Difference]: With dead ends: 373 [2023-12-19 16:33:24,778 INFO L226 Difference]: Without dead ends: 290 [2023-12-19 16:33:24,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=429, Invalid=5118, Unknown=3, NotChecked=0, Total=5550 [2023-12-19 16:33:24,779 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 203 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-12-19 16:33:24,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1220 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-12-19 16:33:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-19 16:33:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 263. [2023-12-19 16:33:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 214 states have (on average 1.1542056074766356) internal successors, (247), 228 states have internal predecessors, (247), 29 states have call successors, (29), 18 states have call predecessors, (29), 19 states have return successors, (24), 16 states have call predecessors, (24), 22 states have call successors, (24) [2023-12-19 16:33:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2023-12-19 16:33:24,861 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 60 [2023-12-19 16:33:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:33:24,861 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2023-12-19 16:33:24,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 42 states have internal predecessors, (90), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 16:33:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2023-12-19 16:33:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-19 16:33:24,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:33:24,862 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] [2023-12-19 16:33:24,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 16:33:25,069 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 [2023-12-19 16:33:25,069 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:33:25,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:33:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1244369143, now seen corresponding path program 3 times [2023-12-19 16:33:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:33:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652563441] [2023-12-19 16:33:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:33:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:33:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:28,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:33:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:33:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:29,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:33:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:29,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 16:33:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:30,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 16:33:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:33:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 16:33:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:33:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652563441] [2023-12-19 16:33:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652563441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:33:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594924637] [2023-12-19 16:33:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 16:33:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:33:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:33:32,210 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) [2023-12-19 16:33:32,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 16:33:33,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 16:33:33,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 16:33:33,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 224 conjunts are in the unsatisfiable core [2023-12-19 16:33:33,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:33:34,152 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 [2023-12-19 16:33:34,613 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 [2023-12-19 16:33:34,687 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 [2023-12-19 16:33:34,694 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 [2023-12-19 16:33:34,714 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 [2023-12-19 16:33:34,904 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 [2023-12-19 16:33:35,717 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 [2023-12-19 16:33:35,726 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 [2023-12-19 16:33:35,749 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 [2023-12-19 16:33:36,086 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-12-19 16:33:36,087 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 29 treesize of output 37 [2023-12-19 16:33:36,108 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 29 treesize of output 16 [2023-12-19 16:33:36,116 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 64 treesize of output 33 [2023-12-19 16:33:36,151 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 [2023-12-19 16:33:37,169 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 [2023-12-19 16:33:37,192 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 [2023-12-19 16:33:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:37,645 INFO L349 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2023-12-19 16:33:37,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 43 [2023-12-19 16:33:37,658 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 96 treesize of output 53 [2023-12-19 16:33:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:37,692 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 32 treesize of output 19 [2023-12-19 16:33:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:37,859 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-19 16:33:37,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 69 [2023-12-19 16:33:37,918 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 [2023-12-19 16:33:38,685 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 [2023-12-19 16:33:38,727 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 [2023-12-19 16:33:39,057 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 149 treesize of output 101 [2023-12-19 16:33:39,097 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-19 16:33:39,097 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 110 treesize of output 48 [2023-12-19 16:33:39,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2023-12-19 16:33:39,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 10 [2023-12-19 16:33:39,802 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 [2023-12-19 16:33:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,310 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2023-12-19 16:33:40,310 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 83 [2023-12-19 16:33:40,328 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 160 treesize of output 108 [2023-12-19 16:33:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,372 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 35 treesize of output 33 [2023-12-19 16:33:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:40,417 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-19 16:33:40,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-12-19 16:33:41,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:33:41,315 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 27 treesize of output 23 [2023-12-19 16:33:41,334 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-19 16:33:41,334 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 [2023-12-19 16:33:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:33:43,390 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 34 treesize of output 10 [2023-12-19 16:33:43,959 INFO L349 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2023-12-19 16:33:43,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 48 [2023-12-19 16:33:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 16:33:43,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:33:44,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:33:44,632 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 154 treesize of output 144 [2023-12-19 16:33:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594924637] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:33:44,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:33:44,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 49 [2023-12-19 16:33:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931555486] [2023-12-19 16:33:44,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:33:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-19 16:33:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:33:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-19 16:33:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2023-12-19 16:33:44,926 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 41 states have internal predecessors, (90), 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) [2023-12-19 16:34:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:34:00,409 INFO L93 Difference]: Finished difference Result 474 states and 548 transitions. [2023-12-19 16:34:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 16:34:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 41 states have internal predecessors, (90), 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 [2023-12-19 16:34:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:34:00,411 INFO L225 Difference]: With dead ends: 474 [2023-12-19 16:34:00,412 INFO L226 Difference]: Without dead ends: 471 [2023-12-19 16:34:00,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=506, Invalid=5194, Unknown=0, NotChecked=0, Total=5700 [2023-12-19 16:34:00,413 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 284 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-12-19 16:34:00,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1584 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-12-19 16:34:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-12-19 16:34:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2023-12-19 16:34:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 247 states have (on average 1.1619433198380567) internal successors, (287), 262 states have internal predecessors, (287), 31 states have call successors, (31), 20 states have call predecessors, (31), 21 states have return successors, (26), 17 states have call predecessors, (26), 24 states have call successors, (26) [2023-12-19 16:34:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 344 transitions. [2023-12-19 16:34:00,567 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 344 transitions. Word has length 60 [2023-12-19 16:34:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:34:00,567 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 344 transitions. [2023-12-19 16:34:00,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 41 states have internal predecessors, (90), 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) [2023-12-19 16:34:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 344 transitions. [2023-12-19 16:34:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-19 16:34:00,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:34:00,568 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] [2023-12-19 16:34:00,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 16:34:00,784 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 [2023-12-19 16:34:00,784 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:34:00,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:34:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -268278171, now seen corresponding path program 4 times [2023-12-19 16:34:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:34:00,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837259395] [2023-12-19 16:34:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:34:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:34:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:34:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:34:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 16:34:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:06,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 16:34:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:07,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 16:34:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 16:34:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:34:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837259395] [2023-12-19 16:34:08,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837259395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:34:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008064851] [2023-12-19 16:34:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 16:34:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:34:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:34:08,277 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) [2023-12-19 16:34:08,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 16:34:10,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 16:34:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 16:34:10,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 262 conjunts are in the unsatisfiable core [2023-12-19 16:34:10,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:34:11,130 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 [2023-12-19 16:34:11,137 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 [2023-12-19 16:34:11,660 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 [2023-12-19 16:34:11,681 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 [2023-12-19 16:34:11,911 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 [2023-12-19 16:34:12,151 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 [2023-12-19 16:34:12,450 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 [2023-12-19 16:34:12,473 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 [2023-12-19 16:34:12,494 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 [2023-12-19 16:34:12,511 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 16 treesize of output 1 [2023-12-19 16:34:12,824 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 [2023-12-19 16:34:12,839 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 19 treesize of output 11 [2023-12-19 16:34:13,312 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 [2023-12-19 16:34:13,324 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 [2023-12-19 16:34:14,143 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 [2023-12-19 16:34:14,167 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 [2023-12-19 16:34:14,561 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 66 treesize of output 35 [2023-12-19 16:34:14,631 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-12-19 16:34:14,631 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 [2023-12-19 16:34:14,667 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 36 treesize of output 23 [2023-12-19 16:34:14,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-19 16:34:14,727 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 [2023-12-19 16:34:15,339 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 56 [2023-12-19 16:34:15,350 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-19 16:34:15,350 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 44 treesize of output 27 [2023-12-19 16:34:15,768 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 [2023-12-19 16:34:15,820 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 [2023-12-19 16:34:15,910 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 [2023-12-19 16:34:15,927 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 114 treesize of output 67 [2023-12-19 16:34:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:15,983 INFO L349 Elim1Store]: treesize reduction 45, result has 10.0 percent of original size [2023-12-19 16:34:15,983 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 100 treesize of output 63 [2023-12-19 16:34:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:16,075 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2023-12-19 16:34:16,075 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 [2023-12-19 16:34:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:16,139 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 51 treesize of output 41 [2023-12-19 16:34:16,824 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 [2023-12-19 16:34:16,839 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 167 treesize of output 119 [2023-12-19 16:34:16,884 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 [2023-12-19 16:34:17,361 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-19 16:34:17,362 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 132 treesize of output 58 [2023-12-19 16:34:17,373 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 [2023-12-19 16:34:17,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-12-19 16:34:18,234 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_53| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_53|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_62| Int)) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_62|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_50| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_50|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_51| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_51|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (store (store (select |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base|) 4 0) 0 (select (select |c_old(#memory_$Pointer$#1.offset)| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2023-12-19 16:34:18,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,370 INFO L349 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2023-12-19 16:34:18,370 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 140 treesize of output 89 [2023-12-19 16:34:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 69 [2023-12-19 16:34:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:18,509 INFO L349 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2023-12-19 16:34:18,509 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 45 treesize of output 49 [2023-12-19 16:34:19,470 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 156 treesize of output 108 [2023-12-19 16:34:19,536 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 [2023-12-19 16:34:22,664 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-12-19 16:34:22,665 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 105 treesize of output 47 [2023-12-19 16:34:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2023-12-19 16:34:22,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:34:25,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008064851] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:34:25,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:34:25,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2023-12-19 16:34:25,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461313768] [2023-12-19 16:34:25,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:34:25,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-19 16:34:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:34:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-19 16:34:25,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3016, Unknown=1, NotChecked=110, Total=3306 [2023-12-19 16:34:25,805 INFO L87 Difference]: Start difference. First operand 300 states and 344 transitions. Second operand has 50 states, 35 states have (on average 2.8) internal successors, (98), 44 states have internal predecessors, (98), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-19 16:34:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:34:46,487 INFO L93 Difference]: Finished difference Result 525 states and 604 transitions. [2023-12-19 16:34:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-19 16:34:46,490 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 35 states have (on average 2.8) internal successors, (98), 44 states have internal predecessors, (98), 13 states have call successors, (13), 8 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 64 [2023-12-19 16:34:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:34:46,492 INFO L225 Difference]: With dead ends: 525 [2023-12-19 16:34:46,492 INFO L226 Difference]: Without dead ends: 429 [2023-12-19 16:34:46,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=526, Invalid=6617, Unknown=1, NotChecked=166, Total=7310 [2023-12-19 16:34:46,493 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 275 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-12-19 16:34:46,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1581 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2835 Invalid, 0 Unknown, 183 Unchecked, 11.1s Time] [2023-12-19 16:34:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-12-19 16:34:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 368. [2023-12-19 16:34:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 302 states have (on average 1.1556291390728477) internal successors, (349), 322 states have internal predecessors, (349), 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) [2023-12-19 16:34:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 421 transitions. [2023-12-19 16:34:46,637 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 421 transitions. Word has length 64 [2023-12-19 16:34:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:34:46,638 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 421 transitions. [2023-12-19 16:34:46,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 35 states have (on average 2.8) internal successors, (98), 44 states have internal predecessors, (98), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-19 16:34:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 421 transitions. [2023-12-19 16:34:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-19 16:34:46,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:34:46,639 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] [2023-12-19 16:34:46,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 16:34:46,850 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 [2023-12-19 16:34:46,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:34:46,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:34:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1423507680, now seen corresponding path program 1 times [2023-12-19 16:34:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:34:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716448195] [2023-12-19 16:34:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:34:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:34:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:34:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:50,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 16:34:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 16:34:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:50,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 16:34:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 16:34:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:34:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716448195] [2023-12-19 16:34:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716448195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:34:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977509611] [2023-12-19 16:34:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:34:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:34:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:34:51,636 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 16:34:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 16:34:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:34:52,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 213 conjunts are in the unsatisfiable core [2023-12-19 16:34:52,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:34:52,370 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 [2023-12-19 16:34:52,664 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 [2023-12-19 16:34:52,672 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 [2023-12-19 16:34:53,380 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 [2023-12-19 16:34:53,398 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 [2023-12-19 16:34:53,407 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 [2023-12-19 16:34:53,438 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 [2023-12-19 16:34:53,719 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 [2023-12-19 16:34:54,298 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 11 treesize of output 7 [2023-12-19 16:34:54,321 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 [2023-12-19 16:34:54,622 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-12-19 16:34:54,622 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 [2023-12-19 16:34:55,147 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 [2023-12-19 16:34:55,210 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 [2023-12-19 16:34:55,554 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 [2023-12-19 16:34:56,532 INFO L349 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2023-12-19 16:34:56,532 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 [2023-12-19 16:34:56,663 INFO L349 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2023-12-19 16:34:56,663 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 [2023-12-19 16:34:56,688 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 [2023-12-19 16:34:56,705 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 [2023-12-19 16:34:56,732 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 [2023-12-19 16:34:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:34:56,809 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 [2023-12-19 16:34:56,832 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 [2023-12-19 16:34:56,931 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 18 [2023-12-19 16:34:57,457 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 [2023-12-19 16:34:57,559 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 [2023-12-19 16:34:58,306 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 [2023-12-19 16:34:58,879 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-19 16:34:58,879 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 [2023-12-19 16:35:04,595 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-12-19 16:35:04,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 75 [2023-12-19 16:35:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:35:04,629 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-19 16:35:04,629 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 [2023-12-19 16:35:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:35:05,273 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-19 16:35:05,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 13 [2023-12-19 16:35:05,903 INFO L349 Elim1Store]: treesize reduction 82, result has 30.5 percent of original size [2023-12-19 16:35:05,903 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 6 case distinctions, treesize of input 62 treesize of output 77 [2023-12-19 16:35:05,995 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 [2023-12-19 16:35:06,119 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 [2023-12-19 16:35:06,168 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 19 treesize of output 15 [2023-12-19 16:35:08,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:35:08,562 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 243 treesize of output 299 [2023-12-19 16:35:09,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:35:09,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 207 treesize of output 315 [2023-12-19 16:35:09,747 INFO L349 Elim1Store]: treesize reduction 8, result has 93.4 percent of original size [2023-12-19 16:35:09,747 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 131 treesize of output 219 [2023-12-19 16:42:24,551 WARN L293 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 302 DAG size of output: 375 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-12-19 16:44:14,978 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 16:44:14,981 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 16:44:15,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 16:44:15,014 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 [2023-12-19 16:44:15,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:44:15,179 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 66 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-31-2-1 context. [2023-12-19 16:44:15,184 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:44:15,186 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 16:44:15,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 04:44:15 BoogieIcfgContainer [2023-12-19 16:44:15,189 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 16:44:15,190 INFO L158 Benchmark]: Toolchain (without parser) took 853944.29ms. Allocated memory was 274.7MB in the beginning and 698.4MB in the end (delta: 423.6MB). Free memory was 223.2MB in the beginning and 402.1MB in the end (delta: -178.9MB). Peak memory consumption was 430.5MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,190 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 186.6MB. Free memory is still 133.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 16:44:15,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.91ms. Allocated memory is still 274.7MB. Free memory was 223.2MB in the beginning and 204.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.38ms. Allocated memory is still 274.7MB. Free memory was 204.3MB in the beginning and 201.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,191 INFO L158 Benchmark]: Boogie Preprocessor took 83.13ms. Allocated memory is still 274.7MB. Free memory was 201.9MB in the beginning and 197.0MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,191 INFO L158 Benchmark]: RCFGBuilder took 472.24ms. Allocated memory is still 274.7MB. Free memory was 196.6MB in the beginning and 231.5MB in the end (delta: -34.9MB). Peak memory consumption was 23.0MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,191 INFO L158 Benchmark]: TraceAbstraction took 853034.52ms. Allocated memory was 274.7MB in the beginning and 698.4MB in the end (delta: 423.6MB). Free memory was 230.5MB in the beginning and 402.1MB in the end (delta: -171.6MB). Peak memory consumption was 436.9MB. Max. memory is 8.0GB. [2023-12-19 16:44:15,196 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 186.6MB. Free memory is still 133.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 296.91ms. Allocated memory is still 274.7MB. Free memory was 223.2MB in the beginning and 204.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.38ms. Allocated memory is still 274.7MB. Free memory was 204.3MB in the beginning and 201.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 83.13ms. Allocated memory is still 274.7MB. Free memory was 201.9MB in the beginning and 197.0MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 472.24ms. Allocated memory is still 274.7MB. Free memory was 196.6MB in the beginning and 231.5MB in the end (delta: -34.9MB). Peak memory consumption was 23.0MB. Max. memory is 8.0GB. * TraceAbstraction took 853034.52ms. Allocated memory was 274.7MB in the beginning and 698.4MB in the end (delta: 423.6MB). Free memory was 230.5MB in the beginning and 402.1MB in the end (delta: -171.6MB). Peak memory consumption was 436.9MB. 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 66 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-31-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 853.0s, OverallIterations: 19, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 178.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 mSolverCounterUnknown, 4661 SdHoareTripleChecker+Valid, 144.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4590 mSDsluCounter, 15445 SdHoareTripleChecker+Invalid, 140.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3305 IncrementalHoareTripleChecker+Unchecked, 14393 mSDsCounter, 1483 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32393 IncrementalHoareTripleChecker+Invalid, 37208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1483 mSolverCounterUnsat, 1052 mSDtfsCounter, 32393 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1997 GetRequests, 1054 SyntacticMatches, 21 SemanticMatches, 922 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 12587 ImplicationChecksByTransitivity, 78.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=368occurred in iteration=18, InterpolantAutomatonStates: 421, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 18 MinimizatonAttempts, 1226 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 93.3s InterpolantComputationTime, 1670 NumberOfCodeBlocks, 1670 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1811 ConstructedInterpolants, 360 QuantifiedInterpolants, 58871 SizeOfPredicates, 574 NumberOfNonLiveVariables, 8613 ConjunctsInSsa, 2167 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 446/972 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