/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_Bitvector.epf -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 [2023-12-24 20:48:06,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 20:48:06,607 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-24 20:48:06,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 20:48:06,613 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 20:48:06,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 20:48:06,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 20:48:06,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 20:48:06,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 20:48:06,636 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 20:48:06,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 20:48:06,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 20:48:06,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 20:48:06,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 20:48:06,638 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 20:48:06,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 20:48:06,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 20:48:06,639 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 20:48:06,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 20:48:06,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 20:48:06,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 20:48:06,640 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 20:48:06,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 20:48:06,641 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 20:48:06,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 20:48:06,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 20:48:06,642 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 20:48:06,643 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 20:48:06,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 20:48:06,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 20:48:06,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 20:48:06,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 20:48:06,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 20:48:06,855 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 20:48:06,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-24 20:48:07,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 20:48:08,154 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 20:48:08,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-2.i [2023-12-24 20:48:08,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb7ee35f/0f8fdfea0d454d41a28d55d2bd4796c7/FLAG6cdf44a08 [2023-12-24 20:48:08,174 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb7ee35f/0f8fdfea0d454d41a28d55d2bd4796c7 [2023-12-24 20:48:08,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 20:48:08,177 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 20:48:08,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 20:48:08,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 20:48:08,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 20:48:08,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9cc9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08, skipping insertion in model container [2023-12-24 20:48:08,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,213 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 20:48:08,422 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] [2023-12-24 20:48:08,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 20:48:08,467 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 20:48:08,490 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] [2023-12-24 20:48:08,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 20:48:08,522 INFO L206 MainTranslator]: Completed translation [2023-12-24 20:48:08,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08 WrapperNode [2023-12-24 20:48:08,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 20:48:08,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 20:48:08,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 20:48:08,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 20:48:08,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,554 INFO L138 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 205 [2023-12-24 20:48:08,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 20:48:08,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 20:48:08,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 20:48:08,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 20:48:08,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,566 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,585 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 8, 18, 8, 6]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 0, 1]. The 10 writes are split as follows [0, 1, 7, 1, 1]. [2023-12-24 20:48:08,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,597 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,600 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 20:48:08,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 20:48:08,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 20:48:08,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 20:48:08,608 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (1/1) ... [2023-12-24 20:48:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 20:48:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 20:48:08,637 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) [2023-12-24 20:48:08,650 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 [2023-12-24 20:48:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-12-24 20:48:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-12-24 20:48:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-24 20:48:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-12-24 20:48:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-12-24 20:48:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-24 20:48:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 20:48:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-24 20:48:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-24 20:48:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-12-24 20:48:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-12-24 20:48:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-12-24 20:48:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-12-24 20:48:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-12-24 20:48:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-12-24 20:48:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 20:48:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 20:48:08,833 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 20:48:08,834 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 20:48:09,250 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 20:48:09,286 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 20:48:09,286 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-12-24 20:48:09,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 08:48:09 BoogieIcfgContainer [2023-12-24 20:48:09,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 20:48:09,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 20:48:09,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 20:48:09,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 20:48:09,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 08:48:08" (1/3) ... [2023-12-24 20:48:09,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e86831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 08:48:09, skipping insertion in model container [2023-12-24 20:48:09,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 08:48:08" (2/3) ... [2023-12-24 20:48:09,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e86831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 08:48:09, skipping insertion in model container [2023-12-24 20:48:09,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 08:48:09" (3/3) ... [2023-12-24 20:48:09,297 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-12-24 20:48:09,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 20:48:09,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 20:48:09,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 20:48:09,356 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;@29170a03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 20:48:09,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 20:48:09,360 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) [2023-12-24 20:48:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-24 20:48:09,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:48:09,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 20:48:09,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:48:09,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:48:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1056251351, now seen corresponding path program 1 times [2023-12-24 20:48:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:48:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374044108] [2023-12-24 20:48:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:48:09,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:48:09,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-24 20:48:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:09,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-24 20:48:09,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:48:09,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 20:48:09,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:48:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374044108] [2023-12-24 20:48:09,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374044108] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 20:48:09,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 20:48:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 20:48:09,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813006920] [2023-12-24 20:48:09,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 20:48:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-24 20:48:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:48:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-24 20:48:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 20:48:09,545 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) [2023-12-24 20:48:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:48:09,658 INFO L93 Difference]: Finished difference Result 177 states and 315 transitions. [2023-12-24 20:48:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-24 20:48:09,661 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 [2023-12-24 20:48:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:48:09,676 INFO L225 Difference]: With dead ends: 177 [2023-12-24 20:48:09,676 INFO L226 Difference]: Without dead ends: 84 [2023-12-24 20:48:09,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 20:48:09,681 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 20:48:09,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 20:48:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-24 20:48:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-24 20:48:09,722 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) [2023-12-24 20:48:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-12-24 20:48:09,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 14 [2023-12-24 20:48:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:48:09,724 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-12-24 20:48:09,724 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) [2023-12-24 20:48:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-12-24 20:48:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-24 20:48:09,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:48:09,726 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] [2023-12-24 20:48:09,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-12-24 20:48:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:09,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:48:09,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:48:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1538349061, now seen corresponding path program 1 times [2023-12-24 20:48:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:48:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404842337] [2023-12-24 20:48:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:48:09,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:48:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-24 20:48:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:10,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-24 20:48:10,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:10,240 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 [2023-12-24 20:48:10,306 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 24 treesize of output 16 [2023-12-24 20:48:10,312 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 [2023-12-24 20:48:10,386 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 [2023-12-24 20:48:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-24 20:48:10,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:48:10,463 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 [2023-12-24 20:48:10,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-24 20:48:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-24 20:48:10,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:48:10,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404842337] [2023-12-24 20:48:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404842337] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 20:48:10,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:48:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2023-12-24 20:48:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283441750] [2023-12-24 20:48:10,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:48:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-24 20:48:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:48:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-24 20:48:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-24 20:48:10,648 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-24 20:48:14,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:19,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:48:20,203 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-12-24 20:48:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-24 20:48:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-24 20:48:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:48:20,206 INFO L225 Difference]: With dead ends: 109 [2023-12-24 20:48:20,206 INFO L226 Difference]: Without dead ends: 106 [2023-12-24 20:48:20,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-24 20:48:20,207 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 155 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-12-24 20:48:20,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 578 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 241 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2023-12-24 20:48:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-24 20:48:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-12-24 20:48:20,218 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) [2023-12-24 20:48:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-12-24 20:48:20,219 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 32 [2023-12-24 20:48:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:48:20,219 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-12-24 20:48:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-24 20:48:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-12-24 20:48:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-24 20:48:20,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:48:20,220 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] [2023-12-24 20:48:20,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-24 20:48:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:20,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:48:20,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:48:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash 877821295, now seen corresponding path program 1 times [2023-12-24 20:48:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:48:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392473414] [2023-12-24 20:48:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:20,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:48:20,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:48:20,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-24 20:48:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:20,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-24 20:48:20,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:20,674 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 [2023-12-24 20:48:20,719 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 [2023-12-24 20:48:20,724 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 [2023-12-24 20:48:20,813 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 [2023-12-24 20:48:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-24 20:48:20,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:48:20,877 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 [2023-12-24 20:48:20,977 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 [2023-12-24 20:48:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-24 20:48:20,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:48:20,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392473414] [2023-12-24 20:48:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392473414] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-24 20:48:20,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:48:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2023-12-24 20:48:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76648302] [2023-12-24 20:48:20,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:48:20,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-24 20:48:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:48:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-24 20:48:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-24 20:48:20,995 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 11 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-24 20:48:25,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:29,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:33,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:48:34,728 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2023-12-24 20:48:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-24 20:48:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-12-24 20:48:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:48:34,730 INFO L225 Difference]: With dead ends: 112 [2023-12-24 20:48:34,730 INFO L226 Difference]: Without dead ends: 109 [2023-12-24 20:48:34,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-24 20:48:34,730 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 126 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-12-24 20:48:34,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 578 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 247 Invalid, 3 Unknown, 0 Unchecked, 13.6s Time] [2023-12-24 20:48:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-24 20:48:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-12-24 20:48:34,741 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) [2023-12-24 20:48:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2023-12-24 20:48:34,742 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 34 [2023-12-24 20:48:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:48:34,742 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-12-24 20:48:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-24 20:48:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2023-12-24 20:48:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-24 20:48:34,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:48:34,743 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] [2023-12-24 20:48:34,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-24 20:48:34,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:34,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:48:34,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:48:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 822846683, now seen corresponding path program 1 times [2023-12-24 20:48:34,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:48:34,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176092344] [2023-12-24 20:48:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:34,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:34,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:48:34,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:48:34,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-24 20:48:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:35,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-24 20:48:35,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:35,253 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 [2023-12-24 20:48:35,350 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 [2023-12-24 20:48:35,359 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 [2023-12-24 20:48:35,364 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 16 treesize of output 1 [2023-12-24 20:48:35,393 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 39 treesize of output 16 [2023-12-24 20:48:35,458 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 [2023-12-24 20:48:35,465 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 [2023-12-24 20:48:35,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-24 20:48:35,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-24 20:48:35,505 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 12 treesize of output 4 [2023-12-24 20:48:35,640 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 [2023-12-24 20:48:35,723 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 [2023-12-24 20:48:35,747 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-24 20:48:35,747 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 1 case distinctions, treesize of input 21 treesize of output 24 [2023-12-24 20:48:35,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:48:35,917 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 64 treesize of output 48 [2023-12-24 20:48:35,950 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-24 20:48:35,950 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 [2023-12-24 20:48:36,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:48:36,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-12-24 20:48:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:48:36,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:48:36,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:48:36,596 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 26 treesize of output 30 [2023-12-24 20:48:36,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:48:36,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176092344] [2023-12-24 20:48:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176092344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:48:36,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727198858] [2023-12-24 20:48:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:36,713 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 20:48:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 20:48:36,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 20:48:36,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-24 20:48:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:37,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-24 20:48:37,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:37,145 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 [2023-12-24 20:48:37,285 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 [2023-12-24 20:48:37,356 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 [2023-12-24 20:48:37,418 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 7 [2023-12-24 20:48:37,508 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 [2023-12-24 20:48:37,517 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 [2023-12-24 20:48:37,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-24 20:48:37,656 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 [2023-12-24 20:48:37,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2023-12-24 20:48:37,835 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 [2023-12-24 20:48:37,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2023-12-24 20:48:37,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 20:48:37,930 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 36 treesize of output 12 [2023-12-24 20:48:37,932 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 11 treesize of output 5 [2023-12-24 20:48:38,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:48:38,322 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 33 [2023-12-24 20:48:38,337 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:48:38,338 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 17 treesize of output 17 [2023-12-24 20:48:38,513 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 31 [2023-12-24 20:48:38,518 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 35 treesize of output 23 [2023-12-24 20:48:38,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:48:38,539 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 35 treesize of output 43 [2023-12-24 20:48:38,687 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 [2023-12-24 20:48:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:48:38,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:48:38,762 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.base_31| (_ BitVec 32)) (v_ArrVal_427 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$#2.base| |v_chain_node_~node~0#1.base_31| v_ArrVal_427) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (_ bv0 32))) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_31|) (_ bv0 1))))) is different from false [2023-12-24 20:48:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727198858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:48:38,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:48:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2023-12-24 20:48:38,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694056864] [2023-12-24 20:48:38,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:48:38,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-24 20:48:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:48:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-24 20:48:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1275, Unknown=28, NotChecked=72, Total=1482 [2023-12-24 20:48:38,767 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 34 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-24 20:48:49,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:52,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:48:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:48:57,128 INFO L93 Difference]: Finished difference Result 315 states and 379 transitions. [2023-12-24 20:48:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-24 20:48:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-12-24 20:48:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:48:57,131 INFO L225 Difference]: With dead ends: 315 [2023-12-24 20:48:57,131 INFO L226 Difference]: Without dead ends: 312 [2023-12-24 20:48:57,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=382, Invalid=4007, Unknown=37, NotChecked=130, Total=4556 [2023-12-24 20:48:57,135 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 485 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 133 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-12-24 20:48:57,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 806 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2142 Invalid, 13 Unknown, 0 Unchecked, 15.6s Time] [2023-12-24 20:48:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-12-24 20:48:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 130. [2023-12-24 20:48:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 111 states have internal predecessors, (123), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-24 20:48:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2023-12-24 20:48:57,183 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 38 [2023-12-24 20:48:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:48:57,183 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2023-12-24 20:48:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-24 20:48:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2023-12-24 20:48:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-24 20:48:57,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:48:57,186 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] [2023-12-24 20:48:57,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-24 20:48:57,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-24 20:48:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 20:48:57,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:48:57,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:48:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1779369084, now seen corresponding path program 1 times [2023-12-24 20:48:57,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:48:57,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973795982] [2023-12-24 20:48:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:48:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:48:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:48:57,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:48:57,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-24 20:48:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:48:57,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-24 20:48:57,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:48:57,922 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 7 [2023-12-24 20:48:57,944 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 [2023-12-24 20:48:58,026 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 [2023-12-24 20:48:58,033 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 [2023-12-24 20:48:58,056 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 11 treesize of output 5 [2023-12-24 20:48:58,129 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 [2023-12-24 20:48:58,141 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 [2023-12-24 20:48:58,148 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 [2023-12-24 20:48:58,155 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 [2023-12-24 20:48:58,227 INFO L349 Elim1Store]: treesize reduction 48, result has 33.3 percent of original size [2023-12-24 20:48:58,227 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 32 [2023-12-24 20:48:58,380 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 [2023-12-24 20:48:58,392 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 7 treesize of output 3 [2023-12-24 20:48:58,398 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 [2023-12-24 20:48:58,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-12-24 20:48:58,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-24 20:48:58,486 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 11 treesize of output 5 [2023-12-24 20:48:58,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-24 20:48:58,722 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 [2023-12-24 20:48:58,884 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 57 treesize of output 37 [2023-12-24 20:48:58,910 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-24 20:48:58,912 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 1 case distinctions, treesize of input 20 treesize of output 23 [2023-12-24 20:48:58,936 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-24 20:48:58,936 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 1 case distinctions, treesize of input 20 treesize of output 23 [2023-12-24 20:48:58,950 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:48:58,950 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 17 treesize of output 17 [2023-12-24 20:48:59,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:48:59,335 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 90 treesize of output 86 [2023-12-24 20:49:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:49:15,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:49:18,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:49:18,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2023-12-24 20:49:25,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:49:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973795982] [2023-12-24 20:49:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973795982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:49:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543390983] [2023-12-24 20:49:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:49:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 20:49:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 20:49:25,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 20:49:25,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-24 20:49:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:49:25,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-24 20:49:25,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:49:25,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-24 20:49:26,060 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 [2023-12-24 20:49:26,077 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 [2023-12-24 20:49:26,098 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 [2023-12-24 20:49:26,107 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 [2023-12-24 20:49:26,849 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 [2023-12-24 20:49:26,891 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 [2023-12-24 20:49:26,899 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 45 treesize of output 29 [2023-12-24 20:49:27,292 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 [2023-12-24 20:49:27,302 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 [2023-12-24 20:49:27,310 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 11 treesize of output 5 [2023-12-24 20:49:27,913 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_20|) (_ bv0 32)) (_ bv0 32))) (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|))))) is different from true [2023-12-24 20:49:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:49:27,937 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 [2023-12-24 20:49:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:49:27,959 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 [2023-12-24 20:49:27,999 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:49:27,999 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 17 treesize of output 17 [2023-12-24 20:49:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-24 20:49:33,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:49:34,323 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)))) (and (forall ((|v_chain_node_~node~0#1.base_37| (_ BitVec 32))) (or (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#2.base| |v_chain_node_~node~0#1.base_37| v_ArrVal_673) .cse0) .cse1) (_ bv0 32))) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_37|) (_ bv0 1))))) (forall ((|v_chain_node_~node~0#1.base_37| (_ BitVec 32))) (or (forall ((v_ArrVal_671 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |v_chain_node_~node~0#1.base_37| v_ArrVal_671) .cse0) .cse1) (_ bv0 32))) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_37|) (_ bv0 1))))))) is different from false [2023-12-24 20:49:34,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543390983] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:49:34,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:49:34,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 34 [2023-12-24 20:49:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101473680] [2023-12-24 20:49:34,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:49:34,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-24 20:49:34,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:49:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-24 20:49:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1424, Unknown=17, NotChecked=154, Total=1722 [2023-12-24 20:49:34,332 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 34 states, 23 states have (on average 2.782608695652174) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-24 20:49:35,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:49:40,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:49:47,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:49:49,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:49:54,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:06,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:10,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:14,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:19,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:23,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:37,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:42,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:47,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:51,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:50:55,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:51:01,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:51:16,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:51:22,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:51:45,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:51:57,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:02,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:06,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:10,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:14,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:16,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:25,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:29,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:31,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:35,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:38,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:42,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:45,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:50,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:54,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:52:58,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:07,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:12,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:23,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:27,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:31,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:35,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:39,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:43,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:48,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:51,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:55,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:53:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:53:55,277 INFO L93 Difference]: Finished difference Result 299 states and 364 transitions. [2023-12-24 20:53:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-24 20:53:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 23 states have (on average 2.782608695652174) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2023-12-24 20:53:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:53:55,280 INFO L225 Difference]: With dead ends: 299 [2023-12-24 20:53:55,280 INFO L226 Difference]: Without dead ends: 296 [2023-12-24 20:53:55,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 88.9s TimeCoverageRelationStatistics Valid=465, Invalid=4484, Unknown=29, NotChecked=278, Total=5256 [2023-12-24 20:53:55,281 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 168 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 203.4s IncrementalHoareTripleChecker+Time [2023-12-24 20:53:55,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 803 Invalid, 2863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [168 Valid, 2337 Invalid, 37 Unknown, 321 Unchecked, 203.4s Time] [2023-12-24 20:53:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-12-24 20:53:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 129. [2023-12-24 20:53:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 110 states have internal predecessors, (122), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-24 20:53:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2023-12-24 20:53:55,317 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 42 [2023-12-24 20:53:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:53:55,317 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2023-12-24 20:53:55,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 23 states have (on average 2.782608695652174) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-24 20:53:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2023-12-24 20:53:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-24 20:53:55,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:53:55,318 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] [2023-12-24 20:53:55,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-12-24 20:53:55,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-12-24 20:53:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 20:53:55,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:53:55,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:53:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2133715017, now seen corresponding path program 1 times [2023-12-24 20:53:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:53:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267922680] [2023-12-24 20:53:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:53:55,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:53:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:53:55,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:53:55,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-24 20:53:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:53:55,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-24 20:53:55,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:53:56,225 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 11 [2023-12-24 20:53:56,248 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 [2023-12-24 20:53:56,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-24 20:53:56,370 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 [2023-12-24 20:53:56,436 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 7 [2023-12-24 20:53:56,685 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 [2023-12-24 20:53:56,698 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 [2023-12-24 20:53:56,723 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 [2023-12-24 20:53:56,750 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 [2023-12-24 20:53:56,894 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 [2023-12-24 20:53:56,928 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 [2023-12-24 20:53:57,204 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 49 [2023-12-24 20:53:57,214 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 54 treesize of output 42 [2023-12-24 20:53:57,246 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 [2023-12-24 20:53:57,259 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 [2023-12-24 20:53:57,404 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 [2023-12-24 20:53:57,430 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 [2023-12-24 20:53:57,441 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 11 treesize of output 5 [2023-12-24 20:53:57,769 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) is different from true [2023-12-24 20:53:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:53:57,791 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 [2023-12-24 20:53:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:53:57,806 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 28 treesize of output 23 [2023-12-24 20:53:57,858 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:53:57,859 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 17 treesize of output 17 [2023-12-24 20:53:58,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2023-12-24 20:53:58,097 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 38 treesize of output 26 [2023-12-24 20:53:58,108 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 [2023-12-24 20:53:58,116 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 [2023-12-24 20:53:58,708 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 [2023-12-24 20:53:58,717 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 [2023-12-24 20:53:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-24 20:53:58,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:53:59,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:53:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267922680] [2023-12-24 20:53:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267922680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:53:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888277295] [2023-12-24 20:53:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:53:59,906 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 20:53:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 20:53:59,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 20:53:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-24 20:54:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:54:00,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-24 20:54:00,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:54:00,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-24 20:54:00,804 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 [2023-12-24 20:54:01,524 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 [2023-12-24 20:54:01,565 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 [2023-12-24 20:54:01,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-24 20:54:02,126 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 7 [2023-12-24 20:54:02,509 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 [2023-12-24 20:54:02,525 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 [2023-12-24 20:54:02,610 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 [2023-12-24 20:54:02,637 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 [2023-12-24 20:54:07,056 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 [2023-12-24 20:54:07,099 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 [2023-12-24 20:54:07,830 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 61 treesize of output 45 [2023-12-24 20:54:07,844 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 [2023-12-24 20:54:07,890 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 [2023-12-24 20:54:07,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 20:54:08,252 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 [2023-12-24 20:54:08,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2023-12-24 20:54:08,272 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 11 treesize of output 5 [2023-12-24 20:54:09,094 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_18|) (_ bv0 32)) (_ bv0 32))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17|) (_ bv0 32)) (_ bv0 32))) (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|))))) is different from true [2023-12-24 20:54:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:54:09,153 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 [2023-12-24 20:54:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:54:09,168 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 [2023-12-24 20:54:09,211 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:54:09,211 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 17 treesize of output 17 [2023-12-24 20:54:09,837 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 [2023-12-24 20:54:09,849 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 [2023-12-24 20:54:09,860 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 [2023-12-24 20:54:10,823 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 [2023-12-24 20:54:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-24 20:54:11,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:54:12,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888277295] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:54:12,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:54:12,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2023-12-24 20:54:12,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485330389] [2023-12-24 20:54:12,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:54:12,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-24 20:54:12,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:54:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-24 20:54:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1032, Unknown=5, NotChecked=130, Total=1260 [2023-12-24 20:54:12,290 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand has 35 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-24 20:54:16,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:54:20,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:54:24,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:54:30,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:54:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:54:53,839 INFO L93 Difference]: Finished difference Result 292 states and 348 transitions. [2023-12-24 20:54:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-24 20:54:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 8 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 [2023-12-24 20:54:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:54:53,841 INFO L225 Difference]: With dead ends: 292 [2023-12-24 20:54:53,841 INFO L226 Difference]: Without dead ends: 222 [2023-12-24 20:54:53,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=243, Invalid=2411, Unknown=6, NotChecked=202, Total=2862 [2023-12-24 20:54:53,842 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 257 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 103 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 33.3s IncrementalHoareTripleChecker+Time [2023-12-24 20:54:53,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 744 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1798 Invalid, 4 Unknown, 415 Unchecked, 33.3s Time] [2023-12-24 20:54:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-12-24 20:54:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2023-12-24 20:54:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 135 states have internal predecessors, (146), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-24 20:54:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2023-12-24 20:54:53,885 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 42 [2023-12-24 20:54:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:54:53,893 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2023-12-24 20:54:53,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 29 states have internal predecessors, (62), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-24 20:54:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2023-12-24 20:54:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-24 20:54:53,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:54:53,894 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] [2023-12-24 20:54:53,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-24 20:54:54,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-12-24 20:54:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 20:54:54,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:54:54,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:54:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1367321695, now seen corresponding path program 1 times [2023-12-24 20:54:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:54:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226342862] [2023-12-24 20:54:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:54:54,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:54:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:54:54,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:54:54,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-24 20:54:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:54:54,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-24 20:54:54,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:54:54,738 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 [2023-12-24 20:54:55,042 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 7 [2023-12-24 20:54:55,232 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 [2023-12-24 20:54:55,263 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 [2023-12-24 20:54:55,285 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 [2023-12-24 20:54:55,410 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 [2023-12-24 20:54:55,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-12-24 20:54:55,717 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 [2023-12-24 20:54:55,746 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 [2023-12-24 20:54:55,766 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 7 treesize of output 3 [2023-12-24 20:54:55,894 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 12 treesize of output 4 [2023-12-24 20:54:55,907 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 11 treesize of output 5 [2023-12-24 20:54:56,381 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 [2023-12-24 20:54:56,580 INFO L349 Elim1Store]: treesize reduction 6, result has 66.7 percent of original size [2023-12-24 20:54:56,580 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 21 treesize of output 21 [2023-12-24 20:54:56,601 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 29 treesize of output 16 [2023-12-24 20:54:56,934 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 21 treesize of output 13 [2023-12-24 20:54:56,946 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 12 treesize of output 4 [2023-12-24 20:54:57,498 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 [2023-12-24 20:54:57,841 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 32 treesize of output 20 [2023-12-24 20:54:57,945 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-24 20:54:57,946 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 1 case distinctions, treesize of input 21 treesize of output 24 [2023-12-24 20:54:58,479 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 32 treesize of output 20 [2023-12-24 20:54:59,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:54:59,437 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 32 treesize of output 24 [2023-12-24 20:54:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:54:59,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:55:00,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:55:00,961 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 26 treesize of output 30 [2023-12-24 20:55:00,996 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.base_46| (_ BitVec 32)) (v_arrayElimArr_13 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_13 (_ bv0 32)) (select (select |c_#memory_$Pointer$#4.base| |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))) (not (= (select (select (store |c_#memory_$Pointer$#2.base| |v_chain_node_~node~0#1.base_46| v_arrayElimArr_13) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (_ bv0 32))))) is different from false [2023-12-24 20:55:01,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:55:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226342862] [2023-12-24 20:55:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226342862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:55:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [837075176] [2023-12-24 20:55:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:55:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 20:55:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 20:55:01,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 20:55:01,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-24 20:55:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:55:01,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-24 20:55:01,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:55:01,773 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 [2023-12-24 20:55:02,320 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 [2023-12-24 20:55:02,691 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 [2023-12-24 20:55:03,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-24 20:55:03,388 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 [2023-12-24 20:55:03,399 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 [2023-12-24 20:55:03,450 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 [2023-12-24 20:55:03,835 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 50 treesize of output 23 [2023-12-24 20:55:04,509 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 [2023-12-24 20:55:04,520 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 [2023-12-24 20:55:04,577 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 [2023-12-24 20:55:04,589 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 [2023-12-24 20:55:04,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-24 20:55:04,982 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 11 treesize of output 5 [2023-12-24 20:55:05,922 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 [2023-12-24 20:55:06,438 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2023-12-24 20:55:06,439 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 1 case distinctions, treesize of input 32 treesize of output 31 [2023-12-24 20:55:06,449 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 [2023-12-24 20:55:06,569 INFO L349 Elim1Store]: treesize reduction 6, result has 66.7 percent of original size [2023-12-24 20:55:06,570 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 21 treesize of output 21 [2023-12-24 20:55:07,310 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 7 [2023-12-24 20:55:07,329 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 21 treesize of output 13 [2023-12-24 20:55:08,389 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 [2023-12-24 20:55:09,024 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-24 20:55:09,024 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 1 case distinctions, treesize of input 24 treesize of output 27 [2023-12-24 20:55:09,036 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 32 treesize of output 20 [2023-12-24 20:55:09,058 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 [2023-12-24 20:55:10,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-12-24 20:55:10,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:55:10,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 110 [2023-12-24 20:55:13,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:55:13,241 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 32 treesize of output 24 [2023-12-24 20:55:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 20:55:13,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:55:13,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 20:55:13,789 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 26 treesize of output 30 [2023-12-24 20:55:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [837075176] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:55:14,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:55:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 41 [2023-12-24 20:55:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994700897] [2023-12-24 20:55:14,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:55:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-24 20:55:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:55:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-24 20:55:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1890, Unknown=40, NotChecked=88, Total=2162 [2023-12-24 20:55:14,624 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 41 states, 27 states have (on average 2.185185185185185) internal successors, (59), 32 states have internal predecessors, (59), 11 states have call successors, (11), 10 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-24 20:55:50,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:56:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 20:56:05,975 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2023-12-24 20:56:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-24 20:56:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 27 states have (on average 2.185185185185185) internal successors, (59), 32 states have internal predecessors, (59), 11 states have call successors, (11), 10 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 45 [2023-12-24 20:56:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 20:56:05,978 INFO L225 Difference]: With dead ends: 357 [2023-12-24 20:56:05,978 INFO L226 Difference]: Without dead ends: 354 [2023-12-24 20:56:05,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=513, Invalid=5920, Unknown=51, NotChecked=158, Total=6642 [2023-12-24 20:56:05,979 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 583 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 4038 mSolverCounterSat, 164 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4038 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2023-12-24 20:56:05,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1841 Invalid, 4223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [164 Valid, 4038 Invalid, 21 Unknown, 0 Unchecked, 41.8s Time] [2023-12-24 20:56:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-12-24 20:56:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 161. [2023-12-24 20:56:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 125 states have (on average 1.192) internal successors, (149), 136 states have internal predecessors, (149), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-24 20:56:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2023-12-24 20:56:06,031 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 45 [2023-12-24 20:56:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 20:56:06,032 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2023-12-24 20:56:06,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 27 states have (on average 2.185185185185185) internal successors, (59), 32 states have internal predecessors, (59), 11 states have call successors, (11), 10 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-24 20:56:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2023-12-24 20:56:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-24 20:56:06,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 20:56:06,033 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] [2023-12-24 20:56:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-12-24 20:56:06,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2023-12-24 20:56:06,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 20:56:06,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 20:56:06,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 20:56:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 651148237, now seen corresponding path program 1 times [2023-12-24 20:56:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 20:56:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686895085] [2023-12-24 20:56:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:56:06,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 20:56:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 20:56:06,447 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 20:56:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-24 20:56:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:56:06,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-24 20:56:06,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:56:06,861 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 7 [2023-12-24 20:56:07,001 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 [2023-12-24 20:56:07,018 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 [2023-12-24 20:56:07,028 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 [2023-12-24 20:56:07,046 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 [2023-12-24 20:56:07,425 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 [2023-12-24 20:56:07,443 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 49 treesize of output 33 [2023-12-24 20:56:07,469 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 [2023-12-24 20:56:07,610 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 [2023-12-24 20:56:07,622 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 [2023-12-24 20:56:07,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-24 20:56:08,017 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.offset_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24|) |v_ULTIMATE.start_main_~#p2~0#1.offset_BEFORE_CALL_24|)))) is different from true [2023-12-24 20:56:08,156 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-24 20:56:08,156 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 25 treesize of output 28 [2023-12-24 20:56:08,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-24 20:56:08,200 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 [2023-12-24 20:56:08,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-24 20:56:08,412 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 11 treesize of output 5 [2023-12-24 20:56:08,422 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 [2023-12-24 20:56:08,729 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.offset_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_24|) |v_ULTIMATE.start_main_~#p2~0#1.offset_BEFORE_CALL_24|)))) is different from true [2023-12-24 20:56:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:56:08,749 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 [2023-12-24 20:56:08,805 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:56:08,805 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 17 treesize of output 17 [2023-12-24 20:56:08,817 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 [2023-12-24 20:56:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-12-24 20:56:10,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:56:11,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 20:56:11,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686895085] [2023-12-24 20:56:11,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686895085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:56:11,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374831764] [2023-12-24 20:56:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 20:56:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 20:56:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 20:56:11,280 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 20:56:11,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-24 20:56:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 20:56:11,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-24 20:56:11,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 20:56:11,873 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 7 [2023-12-24 20:56:11,946 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 [2023-12-24 20:56:11,965 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 [2023-12-24 20:56:11,975 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 [2023-12-24 20:56:11,995 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 [2023-12-24 20:56:12,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-24 20:56:12,484 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 45 treesize of output 29 [2023-12-24 20:56:12,524 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 [2023-12-24 20:56:12,682 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 [2023-12-24 20:56:12,692 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 11 treesize of output 5 [2023-12-24 20:56:12,701 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 [2023-12-24 20:56:17,182 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_29| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_29|) (_ bv0 32)) (_ bv0 32))) (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|))))) is different from true [2023-12-24 20:56:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:56:17,221 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 [2023-12-24 20:56:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 20:56:17,237 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 [2023-12-24 20:56:17,288 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 20:56:17,289 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 17 treesize of output 17 [2023-12-24 20:56:17,640 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 [2023-12-24 20:56:17,651 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 [2023-12-24 20:56:39,551 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-12-24 20:56:39,552 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 1 case distinctions, treesize of input 30 treesize of output 22 [2023-12-24 20:56:39,710 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-12-24 20:56:39,711 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 1 case distinctions, treesize of input 30 treesize of output 22 [2023-12-24 20:56:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-24 20:56:51,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 20:56:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374831764] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 20:56:57,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 20:56:57,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2023-12-24 20:56:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714889826] [2023-12-24 20:56:57,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 20:56:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-24 20:56:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 20:56:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-24 20:56:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=557, Unknown=16, NotChecked=150, Total=812 [2023-12-24 20:56:57,863 INFO L87 Difference]: Start difference. First operand 161 states and 189 transitions. Second operand has 26 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 22 states have internal predecessors, (67), 7 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-24 20:57:04,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:08,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:12,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:16,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:21,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:30,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:34,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:45,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:57:51,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:06,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:10,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:14,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:19,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:23,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:27,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:31,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:35,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:40,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:44,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:48,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:55,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:58:59,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:03,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:06,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:10,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:15,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:24,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:28,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:32,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:37,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:41,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:45,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:49,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 20:59:54,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:04,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:10,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:22,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:27,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:33,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:38,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:42,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:47,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:51,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:55,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:00:59,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:05,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:09,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:14,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:18,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:22,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:25,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:29,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:33,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:37,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 21:01:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 21:01:39,005 INFO L93 Difference]: Finished difference Result 221 states and 261 transitions. [2023-12-24 21:01:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-24 21:01:39,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 22 states have internal predecessors, (67), 7 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 45 [2023-12-24 21:01:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 21:01:39,006 INFO L225 Difference]: With dead ends: 221 [2023-12-24 21:01:39,006 INFO L226 Difference]: Without dead ends: 218 [2023-12-24 21:01:39,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=155, Invalid=893, Unknown=20, NotChecked=192, Total=1260 [2023-12-24 21:01:39,007 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 190 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 74 mSolverCounterUnsat, 74 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 74 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 260.0s IncrementalHoareTripleChecker+Time [2023-12-24 21:01:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 409 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1123 Invalid, 74 Unknown, 519 Unchecked, 260.0s Time] [2023-12-24 21:01:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-24 21:01:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 160. [2023-12-24 21:01:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 125 states have (on average 1.184) internal successors, (148), 135 states have internal predecessors, (148), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-24 21:01:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2023-12-24 21:01:39,076 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 45 [2023-12-24 21:01:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 21:01:39,076 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2023-12-24 21:01:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 22 states have internal predecessors, (67), 7 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-24 21:01:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2023-12-24 21:01:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-24 21:01:39,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 21:01:39,078 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] [2023-12-24 21:01:39,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-12-24 21:01:39,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-12-24 21:01:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:01:39,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 21:01:39,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 21:01:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1048460273, now seen corresponding path program 1 times [2023-12-24 21:01:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 21:01:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166999618] [2023-12-24 21:01:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:01:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:01:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 21:01:39,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 21:01:39,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-24 21:01:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 21:01:39,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-24 21:01:39,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 21:01:40,735 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 [2023-12-24 21:01:40,815 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 [2023-12-24 21:01:41,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-24 21:01:41,262 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 [2023-12-24 21:01:41,644 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 7 [2023-12-24 21:01:42,361 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 [2023-12-24 21:01:42,410 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 [2023-12-24 21:01:42,652 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 [2023-12-24 21:01:42,746 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 [2023-12-24 21:01:43,207 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 [2023-12-24 21:01:43,337 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 [2023-12-24 21:01:44,437 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 49 [2023-12-24 21:01:44,523 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 [2023-12-24 21:01:44,566 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 54 treesize of output 42 [2023-12-24 21:01:44,700 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 [2023-12-24 21:01:45,222 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 [2023-12-24 21:01:45,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-24 21:01:45,303 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 11 treesize of output 5 [2023-12-24 21:01:46,787 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) is different from true [2023-12-24 21:01:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:01:46,856 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 [2023-12-24 21:01:46,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:01:46,924 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 [2023-12-24 21:01:47,434 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-24 21:01:47,434 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 25 treesize of output 28 [2023-12-24 21:01:47,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-24 21:01:47,954 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 [2023-12-24 21:01:47,996 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 11 treesize of output 5 [2023-12-24 21:01:48,970 WARN L876 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.offset| |chain_node_~node~0#1.base|))) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#2.base| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) is different from true [2023-12-24 21:01:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:01:49,046 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 [2023-12-24 21:01:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:01:49,107 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 [2023-12-24 21:01:49,293 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-24 21:01:49,293 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 17 treesize of output 17 [2023-12-24 21:01:50,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2023-12-24 21:01:50,243 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 38 treesize of output 26 [2023-12-24 21:01:50,284 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 [2023-12-24 21:01:50,363 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 [2023-12-24 21:01:52,651 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 [2023-12-24 21:01:52,732 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 [2023-12-24 21:01:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-12-24 21:01:53,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 21:01:57,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 21:01:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166999618] [2023-12-24 21:01:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166999618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 21:01:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1902711709] [2023-12-24 21:01:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 21:01:57,854 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 21:01:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 21:01:57,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 21:01:57,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-24 21:01:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 21:01:58,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-24 21:01:58,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 21:02:00,579 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 [2023-12-24 21:02:00,655 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 [2023-12-24 21:02:03,532 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 [2023-12-24 21:02:03,696 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 [2023-12-24 21:02:04,826 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 [2023-12-24 21:02:06,124 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 7 [2023-12-24 21:02:07,678 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 [2023-12-24 21:02:07,770 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 [2023-12-24 21:02:07,815 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 [2023-12-24 21:02:07,859 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 [2023-12-24 21:02:13,175 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 [2023-12-24 21:02:13,382 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 [2023-12-24 21:02:15,888 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 61 treesize of output 45 [2023-12-24 21:02:15,932 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 [2023-12-24 21:02:16,017 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 50 treesize of output 38 [2023-12-24 21:02:16,147 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 15 treesize of output 1 [2023-12-24 21:02:17,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-24 21:02:17,574 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 15 treesize of output 3 [2023-12-24 21:02:17,617 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 11 treesize of output 5 [2023-12-24 21:02:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:02:28,924 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 [2023-12-24 21:02:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:02:29,027 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 [2023-12-24 21:02:29,462 INFO L349 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2023-12-24 21:02:29,462 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 35 [2023-12-24 21:02:31,972 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 19 treesize of output 7 [2023-12-24 21:02:32,013 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 [2023-12-24 21:02:32,054 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 19 treesize of output 11 [2023-12-24 21:02:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:02:46,445 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 28 treesize of output 23 [2023-12-24 21:02:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 21:02:46,550 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 [2023-12-24 21:02:46,975 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-24 21:02:46,975 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 24 treesize of output 26 Received shutdown request... [2023-12-24 21:02:49,645 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 [2023-12-24 21:02:49,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 21:02:49,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 21:02:49,683 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 21:02:49,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-12-24 21:02:49,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-24 21:02:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 21:02:50,084 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 50 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. [2023-12-24 21:02:50,088 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 21:02:50,089 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 21:02:50,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 09:02:50 BoogieIcfgContainer [2023-12-24 21:02:50,091 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 21:02:50,091 INFO L158 Benchmark]: Toolchain (without parser) took 881914.12ms. Allocated memory is still 326.1MB. Free memory was 277.2MB in the beginning and 253.9MB in the end (delta: 23.2MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,091 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 147.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 21:02:50,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.18ms. Allocated memory is still 326.1MB. Free memory was 276.8MB in the beginning and 257.2MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.97ms. Allocated memory is still 326.1MB. Free memory was 257.2MB in the beginning and 254.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,092 INFO L158 Benchmark]: Boogie Preprocessor took 52.28ms. Allocated memory is still 326.1MB. Free memory was 254.8MB in the beginning and 249.2MB in the end (delta: 5.6MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,092 INFO L158 Benchmark]: RCFGBuilder took 678.62ms. Allocated memory is still 326.1MB. Free memory was 249.2MB in the beginning and 286.3MB in the end (delta: -37.1MB). Peak memory consumption was 27.9MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,092 INFO L158 Benchmark]: TraceAbstraction took 880799.40ms. Allocated memory is still 326.1MB. Free memory was 285.8MB in the beginning and 253.9MB in the end (delta: 31.9MB). Peak memory consumption was 31.9MB. Max. memory is 8.0GB. [2023-12-24 21:02:50,093 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 147.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 345.18ms. Allocated memory is still 326.1MB. Free memory was 276.8MB in the beginning and 257.2MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.97ms. Allocated memory is still 326.1MB. Free memory was 257.2MB in the beginning and 254.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.28ms. Allocated memory is still 326.1MB. Free memory was 254.8MB in the beginning and 249.2MB in the end (delta: 5.6MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 678.62ms. Allocated memory is still 326.1MB. Free memory was 249.2MB in the beginning and 286.3MB in the end (delta: -37.1MB). Peak memory consumption was 27.9MB. Max. memory is 8.0GB. * TraceAbstraction took 880799.40ms. Allocated memory is still 326.1MB. Free memory was 285.8MB in the beginning and 253.9MB in the end (delta: 31.9MB). Peak memory consumption was 31.9MB. 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 50 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 880.8s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 676.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 mSolverCounterUnknown, 2276 SdHoareTripleChecker+Valid, 577.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2243 mSDsluCounter, 5864 SdHoareTripleChecker+Invalid, 567.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1255 IncrementalHoareTripleChecker+Unchecked, 5339 mSDsCounter, 679 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11930 IncrementalHoareTripleChecker+Invalid, 14018 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 679 mSolverCounterUnsat, 525 mSDtfsCounter, 11930 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 892 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 335 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 4711 ImplicationChecksByTransitivity, 198.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=7, InterpolantAutomatonStates: 184, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 674 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 126.9s InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 555 ConstructedInterpolants, 219 QuantifiedInterpolants, 14787 SizeOfPredicates, 378 NumberOfNonLiveVariables, 3753 ConjunctsInSsa, 753 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 83/202 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