/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_floodmax.5.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:15:48,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:15:48,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:15:48,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:15:48,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:15:48,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:15:48,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:15:48,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:15:48,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:15:48,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:15:48,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:15:48,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:15:48,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:15:48,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:15:48,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:15:49,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:15:49,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:15:49,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:15:49,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:15:49,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:15:49,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:15:49,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:15:49,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:15:49,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:15:49,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:15:49,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:15:49,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:15:49,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:15:49,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:15:49,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:15:49,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:15:49,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:15:49,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:15:49,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:15:49,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:15:49,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:15:49,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:15:49,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:15:49,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:15:49,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:15:49,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:15:49,017 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 [2023-04-01 06:15:49,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:15:49,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:15:49,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:15:49,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:15:49,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:15:49,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:15:49,035 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:15:49,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:15:49,035 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:15:49,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:15:49,036 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:15:49,037 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:15:49,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:15:49,037 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:15:49,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:15:49,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:15:49,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:15:49,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:49,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:15:49,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:15:49,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:15:49,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:15:49,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:15:49,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:15:49,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:15:49,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:15:49,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:15:49,278 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:15:49,278 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:15:49,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:50,427 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:15:50,718 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:15:50,719 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:50,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2136e0bd3/2ce06722f9a4416293cf71a3c3a86e56/FLAG651b1934e [2023-04-01 06:15:50,764 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2136e0bd3/2ce06722f9a4416293cf71a3c3a86e56 [2023-04-01 06:15:50,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:15:50,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:15:50,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:50,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:15:50,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:15:50,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:50" (1/1) ... [2023-04-01 06:15:50,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b3f560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:50, skipping insertion in model container [2023-04-01 06:15:50,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:50" (1/1) ... [2023-04-01 06:15:50,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:15:50,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:15:51,201 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_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2023-04-01 06:15:51,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:51,232 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:15:51,378 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_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2023-04-01 06:15:51,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:51,397 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:15:51,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51 WrapperNode [2023-04-01 06:15:51,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:51,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:15:51,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:15:51,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:15:51,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:15:51,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:15:51,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:15:51,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:15:51,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (1/1) ... [2023-04-01 06:15:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:15:51,579 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) [2023-04-01 06:15:51,585 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 [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:15:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:15:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:15:51,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:15:51,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:15:51,618 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:15:51,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:15:51,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:15:51,841 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:15:51,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:15:53,289 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:15:54,522 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:15:54,522 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:15:54,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:54 BoogieIcfgContainer [2023-04-01 06:15:54,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:15:54,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:15:54,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:15:54,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:15:54,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:15:50" (1/3) ... [2023-04-01 06:15:54,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54456493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:54, skipping insertion in model container [2023-04-01 06:15:54,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:51" (2/3) ... [2023-04-01 06:15:54,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54456493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:54, skipping insertion in model container [2023-04-01 06:15:54,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:54" (3/3) ... [2023-04-01 06:15:54,537 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:54,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:15:54,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:15:54,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:15:54,636 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;@7f1640e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:15:54,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:15:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:15:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 06:15:54,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:54,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:54,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:54,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash 103772363, now seen corresponding path program 1 times [2023-04-01 06:15:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260025407] [2023-04-01 06:15:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:16:07,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260025407] [2023-04-01 06:16:07,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260025407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:07,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:07,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 06:16:07,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137817360] [2023-04-01 06:16:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 06:16:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:07,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 06:16:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:16:07,852 INFO L87 Difference]: Start difference. First operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:16:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:13,205 INFO L93 Difference]: Finished difference Result 578 states and 929 transitions. [2023-04-01 06:16:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 06:16:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-01 06:16:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:13,222 INFO L225 Difference]: With dead ends: 578 [2023-04-01 06:16:13,222 INFO L226 Difference]: Without dead ends: 533 [2023-04-01 06:16:13,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 06:16:13,228 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6458 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6461 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:13,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6461 Valid, 142 Invalid, 7363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [190 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 06:16:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-01 06:16:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 509. [2023-04-01 06:16:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6821052631578948) internal successors, (799), 476 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 06:16:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 833 transitions. [2023-04-01 06:16:13,316 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 833 transitions. Word has length 160 [2023-04-01 06:16:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:13,317 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 833 transitions. [2023-04-01 06:16:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:16:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 833 transitions. [2023-04-01 06:16:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 06:16:13,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:13,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:16:13,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:16:13,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:13,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2033712541, now seen corresponding path program 1 times [2023-04-01 06:16:13,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:13,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328950885] [2023-04-01 06:16:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:16:18,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:18,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328950885] [2023-04-01 06:16:18,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328950885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:18,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:18,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:18,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539671354] [2023-04-01 06:16:18,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:18,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:18,343 INFO L87 Difference]: Start difference. First operand 509 states and 833 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:21,132 INFO L93 Difference]: Finished difference Result 589 states and 935 transitions. [2023-04-01 06:16:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-01 06:16:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:21,138 INFO L225 Difference]: With dead ends: 589 [2023-04-01 06:16:21,138 INFO L226 Difference]: Without dead ends: 540 [2023-04-01 06:16:21,139 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 [2023-04-01 06:16:21,140 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 847 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 96 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 06:16:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-04-01 06:16:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2023-04-01 06:16:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.68) internal successors, (798), 476 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 831 transitions. [2023-04-01 06:16:21,189 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 831 transitions. Word has length 161 [2023-04-01 06:16:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:21,190 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 831 transitions. [2023-04-01 06:16:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 831 transitions. [2023-04-01 06:16:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 06:16:21,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:21,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:16:21,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:16:21,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:21,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1455939980, now seen corresponding path program 1 times [2023-04-01 06:16:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:21,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281914543] [2023-04-01 06:16:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:16:25,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:25,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281914543] [2023-04-01 06:16:25,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281914543] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887355081] [2023-04-01 06:16:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:25,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:25,791 INFO L87 Difference]: Start difference. First operand 509 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:28,724 INFO L93 Difference]: Finished difference Result 583 states and 919 transitions. [2023-04-01 06:16:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-01 06:16:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:28,730 INFO L225 Difference]: With dead ends: 583 [2023-04-01 06:16:28,730 INFO L226 Difference]: Without dead ends: 539 [2023-04-01 06:16:28,731 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 [2023-04-01 06:16:28,732 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:28,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 99 Invalid, 6355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 06:16:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-01 06:16:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 509. [2023-04-01 06:16:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6778947368421053) internal successors, (797), 476 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 830 transitions. [2023-04-01 06:16:28,784 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 830 transitions. Word has length 162 [2023-04-01 06:16:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:28,785 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 830 transitions. [2023-04-01 06:16:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 830 transitions. [2023-04-01 06:16:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 06:16:28,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:28,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:16:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:16:28,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:28,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1154274330, now seen corresponding path program 1 times [2023-04-01 06:16:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367993245] [2023-04-01 06:16:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:16:32,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:32,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367993245] [2023-04-01 06:16:32,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367993245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:32,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:32,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333563397] [2023-04-01 06:16:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:32,567 INFO L87 Difference]: Start difference. First operand 509 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:34,949 INFO L93 Difference]: Finished difference Result 591 states and 926 transitions. [2023-04-01 06:16:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-01 06:16:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:34,953 INFO L225 Difference]: With dead ends: 591 [2023-04-01 06:16:34,954 INFO L226 Difference]: Without dead ends: 547 [2023-04-01 06:16:34,954 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 [2023-04-01 06:16:34,956 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 840 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:34,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 100 Invalid, 5576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 06:16:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-04-01 06:16:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 509. [2023-04-01 06:16:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6757894736842105) internal successors, (796), 476 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 829 transitions. [2023-04-01 06:16:35,001 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 829 transitions. Word has length 163 [2023-04-01 06:16:35,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:35,002 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 829 transitions. [2023-04-01 06:16:35,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:35,002 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 829 transitions. [2023-04-01 06:16:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 06:16:35,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:35,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:16:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:16:35,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:35,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash 714137629, now seen corresponding path program 1 times [2023-04-01 06:16:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150396008] [2023-04-01 06:16:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat