/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/verifythis/lcp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:46:08,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:46:08,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:46:08,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:46:08,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:46:08,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:46:08,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:46:08,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:46:08,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:46:08,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:46:08,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:46:08,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:46:08,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:46:08,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:46:08,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:46:08,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:46:08,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:46:08,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:46:08,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:46:08,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:46:08,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:46:08,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:46:08,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:46:08,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:46:08,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:46:08,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:46:08,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:46:08,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:46:08,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:46:08,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:46:08,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:46:08,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:46:08,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:46:08,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:46:08,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:46:08,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:46:08,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:46:08,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:46:08,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:46:08,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:46:08,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:46:08,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:46:08,671 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:46:08,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:46:08,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:46:08,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:46:08,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:46:08,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:46:08,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:46:08,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:46:08,674 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:46:08,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:46:08,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:46:08,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:46:08,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:46:08,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:46:08,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:46:08,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:46:08,678 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:46:08,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:46:08,678 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:46:08,678 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:46:08,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:46:08,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:46:08,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:46:08,943 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:46:08,944 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:46:08,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/lcp.c [2023-04-02 01:46:10,202 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:46:10,404 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:46:10,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c [2023-04-02 01:46:10,410 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7b8a278/436accb3c16243bc97058be66d7bc0db/FLAGd50e84439 [2023-04-02 01:46:10,421 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7b8a278/436accb3c16243bc97058be66d7bc0db [2023-04-02 01:46:10,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:46:10,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:46:10,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:46:10,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:46:10,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:46:10,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbbcc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10, skipping insertion in model container [2023-04-02 01:46:10,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:46:10,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:46:10,558 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c[515,528] [2023-04-02 01:46:10,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:46:10,583 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:46:10,593 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c[515,528] [2023-04-02 01:46:10,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:46:10,612 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:46:10,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10 WrapperNode [2023-04-02 01:46:10,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:46:10,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:46:10,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:46:10,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:46:10,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,642 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:46:10,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:46:10,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:46:10,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:46:10,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (1/1) ... [2023-04-02 01:46:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:46:10,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:46:10,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:46:10,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:46:10,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:46:10,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:46:10,723 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:46:10,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:46:10,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:46:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2023-04-02 01:46:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-02 01:46:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:46:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:46:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:46:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:46:10,813 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:46:10,817 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:46:11,027 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:46:11,034 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:46:11,035 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 01:46:11,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:46:11 BoogieIcfgContainer [2023-04-02 01:46:11,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:46:11,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:46:11,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:46:11,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:46:11,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:46:10" (1/3) ... [2023-04-02 01:46:11,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b086edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:46:11, skipping insertion in model container [2023-04-02 01:46:11,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:46:10" (2/3) ... [2023-04-02 01:46:11,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b086edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:46:11, skipping insertion in model container [2023-04-02 01:46:11,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:46:11" (3/3) ... [2023-04-02 01:46:11,043 INFO L112 eAbstractionObserver]: Analyzing ICFG lcp.c [2023-04-02 01:46:11,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:46:11,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:46:11,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:46:11,115 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=LoopsAndPotentialCycles, 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;@755f0606, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:46:11,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:46:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 01:46:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:46:11,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:46:11,127 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] [2023-04-02 01:46:11,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:46:11,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:46:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -675162514, now seen corresponding path program 1 times [2023-04-02 01:46:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:46:11,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114105814] [2023-04-02 01:46:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:11,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:46:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:46:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:46:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:46:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:46:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:46:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-02 01:46:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:46:11,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:46:11,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114105814] [2023-04-02 01:46:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114105814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:46:11,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:46:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:46:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176730684] [2023-04-02 01:46:11,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:46:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:46:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:46:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:46:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:46:11,383 INFO L87 Difference]: Start difference. First operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 01:46:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:46:11,611 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2023-04-02 01:46:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:46:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-04-02 01:46:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:46:11,620 INFO L225 Difference]: With dead ends: 91 [2023-04-02 01:46:11,620 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 01:46:11,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:46:11,629 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:46:11,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 7 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:46:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 01:46:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 01:46:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:46:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-04-02 01:46:11,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 41 [2023-04-02 01:46:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:46:11,683 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-04-02 01:46:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 01:46:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-04-02 01:46:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:46:11,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:46:11,687 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] [2023-04-02 01:46:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:46:11,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:46:11,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:46:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1025657093, now seen corresponding path program 1 times [2023-04-02 01:46:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:46:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139605510] [2023-04-02 01:46:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:46:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:46:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:46:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:46:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:46:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:46:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-02 01:46:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:46:12,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:46:12,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139605510] [2023-04-02 01:46:12,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139605510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:46:12,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:46:12,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 01:46:12,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095551588] [2023-04-02 01:46:12,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:46:12,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:46:12,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:46:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:46:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:46:12,231 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:46:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:46:12,542 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-04-02 01:46:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:46:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-04-02 01:46:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:46:12,545 INFO L225 Difference]: With dead ends: 64 [2023-04-02 01:46:12,545 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 01:46:12,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:46:12,548 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:46:12,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 15 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:46:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 01:46:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-04-02 01:46:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:46:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-04-02 01:46:12,568 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 43 [2023-04-02 01:46:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:46:12,570 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-04-02 01:46:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:46:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-04-02 01:46:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:46:12,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:46:12,574 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] [2023-04-02 01:46:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:46:12,574 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:46:12,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:46:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -968487613, now seen corresponding path program 1 times [2023-04-02 01:46:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:46:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106742435] [2023-04-02 01:46:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:46:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:46:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:46:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:46:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:46:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:46:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-02 01:46:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:46:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:46:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106742435] [2023-04-02 01:46:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106742435] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:46:12,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:46:12,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 01:46:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45630519] [2023-04-02 01:46:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:46:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:46:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:46:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:46:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:46:12,913 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:46:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:46:13,257 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-04-02 01:46:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:46:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-04-02 01:46:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:46:13,260 INFO L225 Difference]: With dead ends: 48 [2023-04-02 01:46:13,260 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:46:13,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-04-02 01:46:13,262 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:46:13,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:46:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:46:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 01:46:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 10 states have call successors, (10), 8 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:46:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-04-02 01:46:13,283 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 43 [2023-04-02 01:46:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:46:13,283 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-04-02 01:46:13,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:46:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-04-02 01:46:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:46:13,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:46:13,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:46:13,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:46:13,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:46:13,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:46:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash -582845443, now seen corresponding path program 1 times [2023-04-02 01:46:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:46:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540558618] [2023-04-02 01:46:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:13,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:46:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:46:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:46:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:46:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:46:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:46:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-02 01:46:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-02 01:46:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:46:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:46:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540558618] [2023-04-02 01:46:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540558618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:46:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:46:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 01:46:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752445993] [2023-04-02 01:46:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:46:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:46:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:46:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:46:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:46:13,790 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 01:46:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:46:14,246 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-04-02 01:46:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:46:14,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-04-02 01:46:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:46:14,249 INFO L225 Difference]: With dead ends: 64 [2023-04-02 01:46:14,249 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 01:46:14,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:46:14,250 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:46:14,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 19 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:46:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 01:46:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-04-02 01:46:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 8 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:46:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-04-02 01:46:14,258 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 50 [2023-04-02 01:46:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:46:14,258 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-04-02 01:46:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 01:46:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-04-02 01:46:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:46:14,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:46:14,259 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:46:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:46:14,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:46:14,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:46:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash 611931899, now seen corresponding path program 1 times [2023-04-02 01:46:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:46:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950427385] [2023-04-02 01:46:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:46:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:46:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:46:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:46:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:46:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:46:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 01:46:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-02 01:46:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 01:46:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:46:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950427385] [2023-04-02 01:46:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950427385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:46:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521635663] [2023-04-02 01:46:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:46:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:46:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:46:14,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:46:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:46:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:46:14,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 01:46:14,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:46:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 01:46:15,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:46:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 01:46:15,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521635663] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:46:15,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:46:15,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 14 [2023-04-02 01:46:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267945779] [2023-04-02 01:46:15,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:46:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:46:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:46:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:46:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:46:15,387 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 01:46:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:46:15,780 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-02 01:46:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:46:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-04-02 01:46:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:46:15,781 INFO L225 Difference]: With dead ends: 49 [2023-04-02 01:46:15,781 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 01:46:15,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:46:15,782 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:46:15,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:46:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 01:46:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 01:46:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 01:46:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 01:46:15,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2023-04-02 01:46:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:46:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 01:46:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 01:46:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 01:46:15,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 01:46:15,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 01:46:15,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:46:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:46:15,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 11) no Hoare annotation was computed. [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 11) no Hoare annotation was computed. [2023-04-02 01:46:16,213 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 5 7) the Hoare annotation is: true [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2023-04-02 01:46:16,213 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2023-04-02 01:46:16,214 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (or (<= main_~n~0 (+ main_~l~1 main_~y~0)) (<= main_~n~0 (+ main_~l~1 main_~x~0))) (= .cse0 (select |#memory_int| |main_#t~malloc15.base|)))) [2023-04-02 01:46:16,214 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 35 49) no Hoare annotation was computed. [2023-04-02 01:46:16,214 INFO L899 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2023-04-02 01:46:16,214 INFO L899 garLoopResultBuilder]: For program point L45-1(line 45) no Hoare annotation was computed. [2023-04-02 01:46:16,214 INFO L895 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc15.base|)))) [2023-04-02 01:46:16,214 INFO L895 garLoopResultBuilder]: At program point L43-1(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc15.base|)))) [2023-04-02 01:46:16,214 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 35 49) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-04-02 01:46:16,214 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 35 49) no Hoare annotation was computed. [2023-04-02 01:46:16,214 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-04-02 01:46:16,215 INFO L895 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-04-02 01:46:16,215 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-04-02 01:46:16,215 INFO L899 garLoopResultBuilder]: For program point L38-1(line 38) no Hoare annotation was computed. [2023-04-02 01:46:16,215 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (not (= ((as const (Array Int Int)) 0) (select |#memory_int| |check_#in~a.base|))) (and (< (+ |check_#in~x| |check_#in~l|) |check_#in~n|) (< (+ |check_#in~y| |check_#in~l|) |check_#in~n|))) [2023-04-02 01:46:16,215 INFO L899 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2023-04-02 01:46:16,215 INFO L899 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2023-04-02 01:46:16,215 INFO L899 garLoopResultBuilder]: For program point L31-2(lines 24 33) no Hoare annotation was computed. [2023-04-02 01:46:16,215 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (not (= ((as const (Array Int Int)) 0) (select |#memory_int| |check_#in~a.base|))))) (and (or .cse0 (and (< |check_#in~x| |check_#in~n|) (< |check_#in~y| |check_#in~n|)) (= check_~l 0) (not (= |check_#in~l| 0))) (or .cse0 (and (< (+ |check_#in~x| |check_#in~l|) |check_#in~n|) (< (+ |check_#in~y| |check_#in~l|) |check_#in~n|)) (let ((.cse1 (select |#memory_int| check_~a.base)) (.cse2 (* check_~i~0 4))) (and (or (<= check_~n (+ check_~l check_~y)) (<= check_~n (+ check_~l check_~x))) (= |check_#t~mem11| |check_#t~mem10|) (= (select .cse1 (+ .cse2 (* 4 check_~x) check_~a.offset)) 0) (= (select .cse1 (+ .cse2 (* 4 check_~y) check_~a.offset)) 0)))))) [2023-04-02 01:46:16,216 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (not (= ((as const (Array Int Int)) 0) (select |#memory_int| |check_#in~a.base|))))) (and (or .cse0 (and (< |check_#in~x| |check_#in~n|) (< |check_#in~y| |check_#in~n|)) (= check_~l 0) (not (= |check_#in~l| 0))) (or .cse0 (and (< (+ |check_#in~x| |check_#in~l|) |check_#in~n|) (< (+ |check_#in~y| |check_#in~l|) |check_#in~n|)) (let ((.cse1 (select |#memory_int| check_~a.base)) (.cse2 (* check_~i~0 4))) (and (or (<= check_~n (+ check_~l check_~y)) (<= check_~n (+ check_~l check_~x))) (= (select .cse1 (+ .cse2 (* 4 check_~x) check_~a.offset)) 0) (= (select .cse1 (+ .cse2 (* 4 check_~y) check_~a.offset)) 0)))))) [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point checkEXIT(lines 24 33) no Hoare annotation was computed. [2023-04-02 01:46:16,216 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 33) the Hoare annotation is: true [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,216 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,216 INFO L899 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point lcpFINAL(lines 16 22) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L895 garLoopResultBuilder]: At program point L18-5(lines 18 20) the Hoare annotation is: (and (= |lcp_#in~x| lcp_~x) (= |lcp_#in~y| lcp_~y) (= |lcp_#in~n| lcp_~n) (= |lcp_#in~a.base| lcp_~a.base)) [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point lcpEXIT(lines 16 22) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 22) the Hoare annotation is: true [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-04-02 01:46:16,217 INFO L899 garLoopResultBuilder]: For program point L13-3(lines 12 14) no Hoare annotation was computed. [2023-04-02 01:46:16,218 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 14) no Hoare annotation was computed. [2023-04-02 01:46:16,218 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 14) the Hoare annotation is: true [2023-04-02 01:46:16,218 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2023-04-02 01:46:16,218 INFO L899 garLoopResultBuilder]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,218 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-04-02 01:46:16,218 INFO L899 garLoopResultBuilder]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:46:16,220 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-04-02 01:46:16,222 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 01:46:16,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 01:46:16 BoogieIcfgContainer [2023-04-02 01:46:16,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 01:46:16,242 INFO L158 Benchmark]: Toolchain (without parser) took 5817.04ms. Allocated memory was 177.2MB in the beginning and 262.1MB in the end (delta: 84.9MB). Free memory was 137.8MB in the beginning and 201.2MB in the end (delta: -63.4MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-04-02 01:46:16,242 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 177.2MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:46:16,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.77ms. Allocated memory is still 177.2MB. Free memory was 137.5MB in the beginning and 126.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 01:46:16,242 INFO L158 Benchmark]: Boogie Preprocessor took 31.19ms. Allocated memory is still 177.2MB. Free memory was 126.6MB in the beginning and 124.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 01:46:16,243 INFO L158 Benchmark]: RCFGBuilder took 390.75ms. Allocated memory is still 177.2MB. Free memory was 124.9MB in the beginning and 110.9MB in the end (delta: 14.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 01:46:16,243 INFO L158 Benchmark]: TraceAbstraction took 5202.60ms. Allocated memory was 177.2MB in the beginning and 262.1MB in the end (delta: 84.9MB). Free memory was 110.2MB in the beginning and 201.2MB in the end (delta: -91.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:46:16,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 177.2MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.77ms. Allocated memory is still 177.2MB. Free memory was 137.5MB in the beginning and 126.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.19ms. Allocated memory is still 177.2MB. Free memory was 126.6MB in the beginning and 124.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 390.75ms. Allocated memory is still 177.2MB. Free memory was 124.9MB in the beginning and 110.9MB in the end (delta: 14.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 5202.60ms. Allocated memory was 177.2MB in the beginning and 262.1MB in the end (delta: 84.9MB). Free memory was 110.2MB in the beginning and 201.2MB in the end (delta: -91.0MB). There was no memory consumed. 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 355 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 347 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1536 IncrementalHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 17 mSDtfsCounter, 1536 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 46 PreInvPairs, 55 NumberOfFragments, 274 HoareAnnotationTreeSize, 46 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 302 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 283 NumberOfCodeBlocks, 283 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 329 ConstructedInterpolants, 0 QuantifiedInterpolants, 1290 SizeOfPredicates, 13 NumberOfNonLiveVariables, 225 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 95/101 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((\old(x) == x && \old(y) == y) && \old(n) == n) && a == a RESULT: Ultimate proved your program to be correct! [2023-04-02 01:46:16,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...