/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:04:18,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:04:18,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:04:18,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:04:18,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:04:18,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:04:18,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:04:18,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:04:18,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:04:18,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:04:18,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:04:18,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:04:18,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:04:18,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:04:18,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:04:18,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:04:18,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:04:18,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:04:18,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:04:18,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:04:18,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:04:18,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:04:18,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:04:18,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:04:18,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:04:18,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:04:18,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:04:18,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:04:18,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:04:18,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:04:18,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:04:18,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:04:18,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:04:18,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:04:18,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:04:18,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:04:18,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:04:18,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:04:18,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:04:18,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:04:18,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:04:18,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:04:18,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:04:18,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:04:18,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:04:18,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:04:18,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:04:18,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:04:18,216 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:04:18,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:04:18,217 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:04:18,217 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:04:18,218 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:04:18,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:04:18,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:04:18,218 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:04:18,218 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:04:18,218 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:04:18,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:04:18,219 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:04:18,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:04:18,219 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:04:18,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:04:18,221 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:04:18,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:04:18,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:04:18,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:04:18,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:04:18,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:04:18,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:04:18,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:04:18,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:04:18,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:04:18,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:04:18,452 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:04:18,452 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:04:18,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:04:19,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:04:19,828 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:04:19,828 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:04:19,839 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a01b86d3/bcab7db3afbb45bb945909d4a43dadea/FLAGb5bc52147 [2023-04-03 02:04:19,850 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a01b86d3/bcab7db3afbb45bb945909d4a43dadea [2023-04-03 02:04:19,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:04:19,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:04:19,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:04:19,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:04:19,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:04:19,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:04:19" (1/1) ... [2023-04-03 02:04:19,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b13b127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:19, skipping insertion in model container [2023-04-03 02:04:19,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:04:19" (1/1) ... [2023-04-03 02:04:19,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:04:19,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:04:20,160 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/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2023-04-03 02:04:20,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:04:20,188 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:04:20,283 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/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2023-04-03 02:04:20,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:04:20,299 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:04:20,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20 WrapperNode [2023-04-03 02:04:20,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:04:20,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:04:20,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:04:20,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:04:20,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:04:20,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:04:20,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:04:20,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:04:20,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (1/1) ... [2023-04-03 02:04:20,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:04:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:04:20,446 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) [2023-04-03 02:04:20,453 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 [2023-04-03 02:04:20,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:04:20,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:04:20,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:04:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:04:20,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:04:20,489 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:04:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:04:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:04:20,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:04:20,644 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:04:20,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:04:21,530 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:04:22,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:04:22,253 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:04:22,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:04:22 BoogieIcfgContainer [2023-04-03 02:04:22,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:04:22,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:04:22,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:04:22,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:04:22,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:04:19" (1/3) ... [2023-04-03 02:04:22,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402d826d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:04:22, skipping insertion in model container [2023-04-03 02:04:22,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:04:20" (2/3) ... [2023-04-03 02:04:22,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402d826d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:04:22, skipping insertion in model container [2023-04-03 02:04:22,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:04:22" (3/3) ... [2023-04-03 02:04:22,265 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:04:22,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:04:22,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:04:22,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:04:22,342 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=FINITE_AUTOMATA, 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;@fcc58fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:04:22,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:04:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 02:04:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:04:22,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:22,405 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, 1, 1, 1] [2023-04-03 02:04:22,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:22,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash -922842571, now seen corresponding path program 1 times [2023-04-03 02:04:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:22,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56636117] [2023-04-03 02:04:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:28,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56636117] [2023-04-03 02:04:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56636117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:28,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:28,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:04:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11796911] [2023-04-03 02:04:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:28,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:04:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:04:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:04:28,812 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:31,059 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-03 02:04:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:04:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-03 02:04:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:31,076 INFO L225 Difference]: With dead ends: 266 [2023-04-03 02:04:31,076 INFO L226 Difference]: Without dead ends: 225 [2023-04-03 02:04:31,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:04:31,082 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:31,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:04:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-03 02:04:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-03 02:04:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-03 02:04:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-03 02:04:31,142 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-03 02:04:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:31,143 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-03 02:04:31,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-03 02:04:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:04:31,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:31,147 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, 1, 1, 1, 1] [2023-04-03 02:04:31,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:04:31,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:31,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2049195217, now seen corresponding path program 1 times [2023-04-03 02:04:31,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:31,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093386922] [2023-04-03 02:04:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:31,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:33,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093386922] [2023-04-03 02:04:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093386922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:04:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629069696] [2023-04-03 02:04:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:04:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:04:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:04:33,887 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:35,087 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-03 02:04:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:04:35,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-03 02:04:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:35,091 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:04:35,091 INFO L226 Difference]: Without dead ends: 232 [2023-04-03 02:04:35,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:04:35,093 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:35,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:04:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-03 02:04:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-03 02:04:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-03 02:04:35,117 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-03 02:04:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:35,118 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-03 02:04:35,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-03 02:04:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:04:35,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:35,120 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, 1, 1, 1, 1, 1] [2023-04-03 02:04:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:04:35,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:35,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 799797534, now seen corresponding path program 1 times [2023-04-03 02:04:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952963214] [2023-04-03 02:04:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:37,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952963214] [2023-04-03 02:04:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952963214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:04:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020003769] [2023-04-03 02:04:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:37,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:04:37,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:04:37,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:04:37,835 INFO L87 Difference]: Start difference. First operand 201 states and 293 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:39,075 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-03 02:04:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:04:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-03 02:04:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:39,078 INFO L225 Difference]: With dead ends: 271 [2023-04-03 02:04:39,078 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 02:04:39,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:04:39,080 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:39,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:04:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 02:04:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-03 02:04:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-03 02:04:39,114 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-03 02:04:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:39,115 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-03 02:04:39,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-03 02:04:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:04:39,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:39,121 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, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:39,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:04:39,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:39,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1829886426, now seen corresponding path program 1 times [2023-04-03 02:04:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:39,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614633800] [2023-04-03 02:04:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:39,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:41,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614633800] [2023-04-03 02:04:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614633800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:41,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:41,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:04:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742779402] [2023-04-03 02:04:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:04:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:04:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:04:41,609 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:42,672 INFO L93 Difference]: Finished difference Result 279 states and 383 transitions. [2023-04-03 02:04:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:04:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-03 02:04:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:42,675 INFO L225 Difference]: With dead ends: 279 [2023-04-03 02:04:42,675 INFO L226 Difference]: Without dead ends: 239 [2023-04-03 02:04:42,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:04:42,677 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:42,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 97 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:04:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-04-03 02:04:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2023-04-03 02:04:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-03 02:04:42,702 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-03 02:04:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:42,703 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-03 02:04:42,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-03 02:04:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:04:42,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:42,704 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:42,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:04:42,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:42,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash 509615111, now seen corresponding path program 1 times [2023-04-03 02:04:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:42,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065523349] [2023-04-03 02:04:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:42,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:44,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:44,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065523349] [2023-04-03 02:04:44,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065523349] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:44,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:04:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962961343] [2023-04-03 02:04:44,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:44,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:04:44,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:04:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:04:44,979 INFO L87 Difference]: Start difference. First operand 201 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:46,187 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-03 02:04:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:04:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-03 02:04:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:46,189 INFO L225 Difference]: With dead ends: 283 [2023-04-03 02:04:46,189 INFO L226 Difference]: Without dead ends: 243 [2023-04-03 02:04:46,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:04:46,190 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 585 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:46,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 93 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:04:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-03 02:04:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-03 02:04:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-03 02:04:46,217 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-03 02:04:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:46,218 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-03 02:04:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-03 02:04:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 02:04:46,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:46,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:46,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:04:46,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:46,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash 245788559, now seen corresponding path program 1 times [2023-04-03 02:04:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128954489] [2023-04-03 02:04:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:50,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128954489] [2023-04-03 02:04:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128954489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:50,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:04:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152248879] [2023-04-03 02:04:50,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:50,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:04:50,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:04:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:04:50,264 INFO L87 Difference]: Start difference. First operand 201 states and 290 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:52,134 INFO L93 Difference]: Finished difference Result 278 states and 389 transitions. [2023-04-03 02:04:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:04:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-03 02:04:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:52,137 INFO L225 Difference]: With dead ends: 278 [2023-04-03 02:04:52,137 INFO L226 Difference]: Without dead ends: 235 [2023-04-03 02:04:52,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:04:52,138 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1090 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:52,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 137 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:04:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-03 02:04:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2023-04-03 02:04:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 173 states have (on average 1.5144508670520231) internal successors, (262), 174 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 291 transitions. [2023-04-03 02:04:52,165 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 291 transitions. Word has length 91 [2023-04-03 02:04:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:52,165 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 291 transitions. [2023-04-03 02:04:52,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 291 transitions. [2023-04-03 02:04:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 02:04:52,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:52,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:52,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:04:52,166 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:52,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1448458607, now seen corresponding path program 1 times [2023-04-03 02:04:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891859495] [2023-04-03 02:04:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:53,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891859495] [2023-04-03 02:04:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891859495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:53,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:04:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311655501] [2023-04-03 02:04:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:04:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:04:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:04:53,362 INFO L87 Difference]: Start difference. First operand 203 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:54,405 INFO L93 Difference]: Finished difference Result 276 states and 383 transitions. [2023-04-03 02:04:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:04:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-03 02:04:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:54,407 INFO L225 Difference]: With dead ends: 276 [2023-04-03 02:04:54,407 INFO L226 Difference]: Without dead ends: 229 [2023-04-03 02:04:54,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:04:54,409 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 536 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:54,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 92 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:04:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-04-03 02:04:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2023-04-03 02:04:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 173 states have internal predecessors, (255), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2023-04-03 02:04:54,438 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 92 [2023-04-03 02:04:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:54,439 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2023-04-03 02:04:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:04:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2023-04-03 02:04:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:04:54,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:54,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:04:54,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:54,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1396052265, now seen corresponding path program 1 times [2023-04-03 02:04:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891555623] [2023-04-03 02:04:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:04:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:04:57,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:04:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891555623] [2023-04-03 02:04:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891555623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:04:57,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:04:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:04:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965874638] [2023-04-03 02:04:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:04:57,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:04:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:04:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:04:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:04:57,641 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:04:59,755 INFO L93 Difference]: Finished difference Result 300 states and 395 transitions. [2023-04-03 02:04:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 02:04:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-03 02:04:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:04:59,757 INFO L225 Difference]: With dead ends: 300 [2023-04-03 02:04:59,758 INFO L226 Difference]: Without dead ends: 258 [2023-04-03 02:04:59,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:04:59,759 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1333 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:04:59,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 180 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:04:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-04-03 02:04:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 202. [2023-04-03 02:04:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.4767441860465116) internal successors, (254), 173 states have internal predecessors, (254), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:04:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 283 transitions. [2023-04-03 02:04:59,787 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 283 transitions. Word has length 94 [2023-04-03 02:04:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:04:59,787 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 283 transitions. [2023-04-03 02:04:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:04:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 283 transitions. [2023-04-03 02:04:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:04:59,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:04:59,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:04:59,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:04:59,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:04:59,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:04:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1222209422, now seen corresponding path program 1 times [2023-04-03 02:04:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:04:59,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701943296] [2023-04-03 02:04:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:04:59,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:04:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:05:01,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:05:01,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701943296] [2023-04-03 02:05:01,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701943296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:05:01,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:05:01,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:05:01,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172033596] [2023-04-03 02:05:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:05:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:05:01,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:05:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:05:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:05:01,509 INFO L87 Difference]: Start difference. First operand 202 states and 283 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 02:05:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:05:01,955 INFO L93 Difference]: Finished difference Result 236 states and 325 transitions. [2023-04-03 02:05:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:05:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-03 02:05:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:05:01,957 INFO L225 Difference]: With dead ends: 236 [2023-04-03 02:05:01,957 INFO L226 Difference]: Without dead ends: 234 [2023-04-03 02:05:01,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:05:01,958 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 36 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:05:01,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2691 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:05:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-03 02:05:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2023-04-03 02:05:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 180 states have internal predecessors, (260), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-03 02:05:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 292 transitions. [2023-04-03 02:05:01,999 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 292 transitions. Word has length 95 [2023-04-03 02:05:01,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:05:01,999 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 292 transitions. [2023-04-03 02:05:01,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 02:05:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 292 transitions. [2023-04-03 02:05:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 02:05:02,001 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:05:02,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:05:02,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:05:02,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:05:02,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:05:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1821695299, now seen corresponding path program 1 times [2023-04-03 02:05:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:05:02,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454354828] [2023-04-03 02:05:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:05:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:05:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:05:18,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:05:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454354828] [2023-04-03 02:05:18,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454354828] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:05:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500283654] [2023-04-03 02:05:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:05:18,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:05:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:05:18,873 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) [2023-04-03 02:05:18,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:05:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:05:19,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 102 conjunts are in the unsatisfiable core [2023-04-03 02:05:19,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:05:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:05:42,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:05:43,348 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 19399 disjunctions. This might take some time... [2023-04-03 02:06:00,568 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 19399 disjunctions.