/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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:50:29,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:50:29,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:50:29,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:50:29,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:50:29,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:50:29,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:50:29,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:50:29,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:50:29,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:50:29,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:50:29,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:50:29,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:50:29,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:50:29,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:50:29,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:50:29,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:50:29,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:50:29,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:50:29,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:50:29,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:50:29,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:50:29,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:50:29,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:50:29,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:50:29,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:50:29,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:50:29,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:50:29,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:50:29,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:50:29,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:50:29,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:50:29,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:50:29,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:50:29,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:50:29,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:50:29,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:50:29,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:50:29,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:50:29,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:50:29,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:50:29,729 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 [2023-03-31 01:50:29,763 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:50:29,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:50:29,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:50:29,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:50:29,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:50:29,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:50:29,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:50:29,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:50:29,766 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:50:29,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:50:29,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:50:29,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:50:29,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:50:29,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:50:29,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:50:29,770 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:50:29,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:50:29,770 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:50:29,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:50:29,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:50:30,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:50:30,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:50:30,011 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:50:30,011 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:50:30,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-03-31 01:50:31,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:50:31,492 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:50:31,493 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-03-31 01:50:31,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2c4775fa/97ba0786309949adba4654fc7001a668/FLAGd29d00973 [2023-03-31 01:50:31,552 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2c4775fa/97ba0786309949adba4654fc7001a668 [2023-03-31 01:50:31,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:50:31,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:50:31,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:50:31,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:50:31,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:50:31,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:50:31" (1/1) ... [2023-03-31 01:50:31,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3d8a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:31, skipping insertion in model container [2023-03-31 01:50:31,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:50:31" (1/1) ... [2023-03-31 01:50:31,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:50:31,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:50:32,018 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[14256,14269] [2023-03-31 01:50:32,046 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[20101,20114] [2023-03-31 01:50:32,057 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[21333,21346] [2023-03-31 01:50:32,078 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[23565,23578] [2023-03-31 01:50:32,096 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[26974,26987] [2023-03-31 01:50:32,131 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[33563,33576] [2023-03-31 01:50:32,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:50:32,678 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:50:32,740 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[14256,14269] [2023-03-31 01:50:32,763 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[20101,20114] [2023-03-31 01:50:32,771 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[21333,21346] [2023-03-31 01:50:32,777 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[23565,23578] [2023-03-31 01:50:32,784 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[26974,26987] [2023-03-31 01:50:32,798 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[33563,33576] [2023-03-31 01:50:33,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:50:33,125 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:50:33,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33 WrapperNode [2023-03-31 01:50:33,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:50:33,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:50:33,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:50:33,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:50:33,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:50:33,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:50:33,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:50:33,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:50:33,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (1/1) ... [2023-03-31 01:50:33,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:50:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:50:33,484 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) [2023-03-31 01:50:33,502 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 [2023-03-31 01:50:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:50:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:50:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:50:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:50:33,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:50:33,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:50:33,520 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:50:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:50:33,918 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:50:33,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:50:37,137 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:50:37,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:50:37,152 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:50:37,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:50:37 BoogieIcfgContainer [2023-03-31 01:50:37,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:50:37,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:50:37,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:50:37,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:50:37,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:50:31" (1/3) ... [2023-03-31 01:50:37,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162d40b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:50:37, skipping insertion in model container [2023-03-31 01:50:37,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:50:33" (2/3) ... [2023-03-31 01:50:37,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162d40b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:50:37, skipping insertion in model container [2023-03-31 01:50:37,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:50:37" (3/3) ... [2023-03-31 01:50:37,161 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-03-31 01:50:37,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:50:37,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-03-31 01:50:37,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:50:37,248 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;@1c43bf47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:50:37,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-03-31 01:50:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 1764 states, 1753 states have (on average 1.7969195664575015) internal successors, (3150), 1759 states have internal predecessors, (3150), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:50:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 01:50:37,287 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:37,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:50:37,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-03-31 01:50:37,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash 615635227, now seen corresponding path program 1 times [2023-03-31 01:50:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751855312] [2023-03-31 01:50:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:50:39,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:39,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751855312] [2023-03-31 01:50:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751855312] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:39,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:39,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:50:39,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310771613] [2023-03-31 01:50:39,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:39,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:50:39,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:50:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:50:39,578 INFO L87 Difference]: Start difference. First operand has 1764 states, 1753 states have (on average 1.7969195664575015) internal successors, (3150), 1759 states have internal predecessors, (3150), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:50:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:53,312 INFO L93 Difference]: Finished difference Result 2345 states and 4116 transitions. [2023-03-31 01:50:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:50:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-03-31 01:50:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:53,341 INFO L225 Difference]: With dead ends: 2345 [2023-03-31 01:50:53,341 INFO L226 Difference]: Without dead ends: 1991 [2023-03-31 01:50:53,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:50:53,349 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 1605 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 5070 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:53,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1605 Valid, 5070 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-03-31 01:50:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2023-03-31 01:50:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1981. [2023-03-31 01:50:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1972 states have (on average 1.3498985801217038) internal successors, (2662), 1977 states have internal predecessors, (2662), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:50:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2665 transitions. [2023-03-31 01:50:53,497 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2665 transitions. Word has length 80 [2023-03-31 01:50:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:53,497 INFO L495 AbstractCegarLoop]: Abstraction has 1981 states and 2665 transitions. [2023-03-31 01:50:53,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:50:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2665 transitions. [2023-03-31 01:50:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 01:50:53,505 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:53,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:50:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:50:53,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-03-31 01:50:53,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1691419284, now seen corresponding path program 1 times [2023-03-31 01:50:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176372667] [2023-03-31 01:50:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:55,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:50:55,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176372667] [2023-03-31 01:50:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176372667] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:55,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:55,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:50:55,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732688023] [2023-03-31 01:50:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:55,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:50:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:50:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:55,438 INFO L87 Difference]: Start difference. First operand 1981 states and 2665 transitions. Second operand has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:51:04,417 INFO L93 Difference]: Finished difference Result 3381 states and 4675 transitions. [2023-03-31 01:51:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:51:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-03-31 01:51:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:51:04,424 INFO L225 Difference]: With dead ends: 3381 [2023-03-31 01:51:04,425 INFO L226 Difference]: Without dead ends: 1911 [2023-03-31 01:51:04,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:51:04,432 INFO L413 NwaCegarLoop]: 1003 mSDtfsCounter, 5831 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5831 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:51:04,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5831 Valid, 1228 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-31 01:51:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-03-31 01:51:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1901. [2023-03-31 01:51:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1892 states have (on average 1.3969344608879493) internal successors, (2643), 1897 states have internal predecessors, (2643), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2646 transitions. [2023-03-31 01:51:04,513 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2646 transitions. Word has length 80 [2023-03-31 01:51:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:51:04,514 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 2646 transitions. [2023-03-31 01:51:04,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2646 transitions. [2023-03-31 01:51:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:51:04,517 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:51:04,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:51:04,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:51:04,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-03-31 01:51:04,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:51:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash -535127942, now seen corresponding path program 1 times [2023-03-31 01:51:04,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:51:04,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942858934] [2023-03-31 01:51:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:51:04,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:51:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:51:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:51:06,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:51:06,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942858934] [2023-03-31 01:51:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942858934] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:51:06,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:51:06,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:51:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010728931] [2023-03-31 01:51:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:51:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:51:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:51:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:51:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:51:06,045 INFO L87 Difference]: Start difference. First operand 1901 states and 2646 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:51:15,753 INFO L93 Difference]: Finished difference Result 3453 states and 4888 transitions. [2023-03-31 01:51:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:51:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-03-31 01:51:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:51:15,764 INFO L225 Difference]: With dead ends: 3453 [2023-03-31 01:51:15,764 INFO L226 Difference]: Without dead ends: 2723 [2023-03-31 01:51:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:51:15,767 INFO L413 NwaCegarLoop]: 2350 mSDtfsCounter, 1496 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 3483 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:51:15,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 3483 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-03-31 01:51:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2023-03-31 01:51:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2711. [2023-03-31 01:51:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2702 states have (on average 1.390081421169504) internal successors, (3756), 2707 states have internal predecessors, (3756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3759 transitions. [2023-03-31 01:51:15,881 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3759 transitions. Word has length 81 [2023-03-31 01:51:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:51:15,882 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3759 transitions. [2023-03-31 01:51:15,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3759 transitions. [2023-03-31 01:51:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:51:15,886 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:51:15,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:51:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:51:15,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-03-31 01:51:15,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:51:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 238878547, now seen corresponding path program 1 times [2023-03-31 01:51:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:51:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335186961] [2023-03-31 01:51:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:51:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:51:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:17,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:51:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:51:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:51:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335186961] [2023-03-31 01:51:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335186961] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:51:17,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:51:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:51:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418788218] [2023-03-31 01:51:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:51:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:51:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:51:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:51:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:51:17,539 INFO L87 Difference]: Start difference. First operand 2711 states and 3759 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:51:24,193 INFO L93 Difference]: Finished difference Result 5327 states and 7593 transitions. [2023-03-31 01:51:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:51:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-03-31 01:51:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:51:24,205 INFO L225 Difference]: With dead ends: 5327 [2023-03-31 01:51:24,206 INFO L226 Difference]: Without dead ends: 3161 [2023-03-31 01:51:24,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:51:24,211 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 4644 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4644 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:51:24,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4644 Valid, 1006 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-31 01:51:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2023-03-31 01:51:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3151. [2023-03-31 01:51:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 3142 states have (on average 1.4312539783577338) internal successors, (4497), 3147 states have internal predecessors, (4497), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4500 transitions. [2023-03-31 01:51:24,379 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4500 transitions. Word has length 81 [2023-03-31 01:51:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:51:24,379 INFO L495 AbstractCegarLoop]: Abstraction has 3151 states and 4500 transitions. [2023-03-31 01:51:24,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:51:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4500 transitions. [2023-03-31 01:51:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 01:51:24,385 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:51:24,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:51:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:51:24,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-03-31 01:51:24,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:51:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1320553341, now seen corresponding path program 1 times [2023-03-31 01:51:24,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:51:24,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50341385] [2023-03-31 01:51:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:51:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:51:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:51:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:51:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:51:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:51:25,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50341385] [2023-03-31 01:51:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50341385] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:51:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:51:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:51:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360049777] [2023-03-31 01:51:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:51:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:51:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:51:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:51:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:51:25,887 INFO L87 Difference]: Start difference. First operand 3151 states and 4500 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)