/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:30:20,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:30:20,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:30:20,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:30:20,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:30:20,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:30:20,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:30:20,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:30:20,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:30:20,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:30:20,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:30:20,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:30:20,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:30:20,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:30:20,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:30:20,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:30:20,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:30:20,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:30:20,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:30:20,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:30:20,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:30:20,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:30:21,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:30:21,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:30:21,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:30:21,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:30:21,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:30:21,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:30:21,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:30:21,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:30:21,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:30:21,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:30:21,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:30:21,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:30:21,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:30:21,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:30:21,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:30:21,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:30:21,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:30:21,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:30:21,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:30:21,017 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 00:30:21,044 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:30:21,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:30:21,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:30:21,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:30:21,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:30:21,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:30:21,046 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:30:21,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:30:21,047 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:30:21,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:30:21,048 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:30:21,048 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:30:21,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:30:21,049 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:30:21,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:30:21,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:30:21,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:30:21,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:30:21,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:30:21,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:30:21,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:30:21,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:30:21,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:30:21,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:30:21,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:30:21,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:30:21,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:30:21,326 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:30:21,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:30:22,506 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:30:22,753 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:30:22,754 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:30:22,765 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745dcb9bc/495ab4a808bc413abfe8449417d744b9/FLAG4caa46ca5 [2023-04-01 00:30:22,777 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745dcb9bc/495ab4a808bc413abfe8449417d744b9 [2023-04-01 00:30:22,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:30:22,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:30:22,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:30:22,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:30:22,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:30:22,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:30:22" (1/1) ... [2023-04-01 00:30:22,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc8a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:22, skipping insertion in model container [2023-04-01 00:30:22,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:30:22" (1/1) ... [2023-04-01 00:30:22,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:30:22,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:30:23,102 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-04-01 00:30:23,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:30:23,167 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:30:23,212 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-04-01 00:30:23,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:30:23,259 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:30:23,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23 WrapperNode [2023-04-01 00:30:23,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:30:23,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:30:23,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:30:23,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:30:23,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:30:23,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:30:23,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:30:23,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:30:23,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (1/1) ... [2023-04-01 00:30:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:30:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:30:23,388 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 00:30:23,418 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 00:30:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:30:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:30:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:30:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:30:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:30:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:30:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:30:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:30:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:30:23,441 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:30:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:30:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:30:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:30:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:30:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:30:23,578 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:30:23,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:30:24,335 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:30:24,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:30:24,543 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:30:24,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:30:24 BoogieIcfgContainer [2023-04-01 00:30:24,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:30:24,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:30:24,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:30:24,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:30:24,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:30:22" (1/3) ... [2023-04-01 00:30:24,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6eb0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:30:24, skipping insertion in model container [2023-04-01 00:30:24,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:30:23" (2/3) ... [2023-04-01 00:30:24,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6eb0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:30:24, skipping insertion in model container [2023-04-01 00:30:24,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:30:24" (3/3) ... [2023-04-01 00:30:24,554 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:30:24,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:30:24,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:30:24,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:30:24,647 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;@4a5b9ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:30:24,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:30:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:30:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 00:30:24,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:24,667 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] [2023-04-01 00:30:24,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:24,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -337454442, now seen corresponding path program 1 times [2023-04-01 00:30:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805891743] [2023-04-01 00:30:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:25,452 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 00:30:25,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805891743] [2023-04-01 00:30:25,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805891743] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:25,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:25,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:30:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513856148] [2023-04-01 00:30:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:25,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:30:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:30:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:25,506 INFO L87 Difference]: Start difference. First operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:25,933 INFO L93 Difference]: Finished difference Result 595 states and 942 transitions. [2023-04-01 00:30:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:30:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-01 00:30:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:25,954 INFO L225 Difference]: With dead ends: 595 [2023-04-01 00:30:25,954 INFO L226 Difference]: Without dead ends: 484 [2023-04-01 00:30:25,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:25,963 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 991 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:25,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1079 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-04-01 00:30:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 476. [2023-04-01 00:30:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.4046610169491525) internal successors, (663), 472 states have internal predecessors, (663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 666 transitions. [2023-04-01 00:30:26,086 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 666 transitions. Word has length 72 [2023-04-01 00:30:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:26,087 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 666 transitions. [2023-04-01 00:30:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 666 transitions. [2023-04-01 00:30:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:30:26,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:26,090 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] [2023-04-01 00:30:26,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:30:26,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:26,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 896406262, now seen corresponding path program 1 times [2023-04-01 00:30:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522762659] [2023-04-01 00:30:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:26,242 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 00:30:26,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522762659] [2023-04-01 00:30:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522762659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:26,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967648647] [2023-04-01 00:30:26,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:26,246 INFO L87 Difference]: Start difference. First operand 476 states and 666 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:26,595 INFO L93 Difference]: Finished difference Result 1136 states and 1630 transitions. [2023-04-01 00:30:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:30:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:26,606 INFO L225 Difference]: With dead ends: 1136 [2023-04-01 00:30:26,606 INFO L226 Difference]: Without dead ends: 706 [2023-04-01 00:30:26,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:26,615 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 597 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:26,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-04-01 00:30:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2023-04-01 00:30:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.4285714285714286) internal successors, (1000), 700 states have internal predecessors, (1000), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1003 transitions. [2023-04-01 00:30:26,726 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1003 transitions. Word has length 73 [2023-04-01 00:30:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:26,726 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1003 transitions. [2023-04-01 00:30:26,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1003 transitions. [2023-04-01 00:30:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:30:26,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:26,732 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] [2023-04-01 00:30:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:30:26,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:26,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -808924701, now seen corresponding path program 1 times [2023-04-01 00:30:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:26,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673005125] [2023-04-01 00:30:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:26,917 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 00:30:26,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673005125] [2023-04-01 00:30:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673005125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:26,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:26,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031002330] [2023-04-01 00:30:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:26,919 INFO L87 Difference]: Start difference. First operand 704 states and 1003 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:27,337 INFO L93 Difference]: Finished difference Result 1798 states and 2618 transitions. [2023-04-01 00:30:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:30:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:27,343 INFO L225 Difference]: With dead ends: 1798 [2023-04-01 00:30:27,343 INFO L226 Difference]: Without dead ends: 1209 [2023-04-01 00:30:27,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:27,345 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 558 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:27,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 255 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-04-01 00:30:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2023-04-01 00:30:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1203 states have (on average 1.4480465502909394) internal successors, (1742), 1203 states have internal predecessors, (1742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1745 transitions. [2023-04-01 00:30:27,519 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1745 transitions. Word has length 73 [2023-04-01 00:30:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:27,521 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1745 transitions. [2023-04-01 00:30:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1745 transitions. [2023-04-01 00:30:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:30:27,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:27,523 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] [2023-04-01 00:30:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:30:27,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:27,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1750533170, now seen corresponding path program 1 times [2023-04-01 00:30:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406665528] [2023-04-01 00:30:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:27,725 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 00:30:27,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406665528] [2023-04-01 00:30:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406665528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:27,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:27,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378394562] [2023-04-01 00:30:27,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:27,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:27,729 INFO L87 Difference]: Start difference. First operand 1207 states and 1745 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:28,285 INFO L93 Difference]: Finished difference Result 3273 states and 4807 transitions. [2023-04-01 00:30:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:30:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:28,294 INFO L225 Difference]: With dead ends: 3273 [2023-04-01 00:30:28,294 INFO L226 Difference]: Without dead ends: 2215 [2023-04-01 00:30:28,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:28,297 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 576 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:28,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 256 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-01 00:30:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2023-04-01 00:30:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2209 states have (on average 1.4594839293798099) internal successors, (3224), 2209 states have internal predecessors, (3224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3227 transitions. [2023-04-01 00:30:28,635 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3227 transitions. Word has length 73 [2023-04-01 00:30:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:28,636 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3227 transitions. [2023-04-01 00:30:28,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3227 transitions. [2023-04-01 00:30:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:30:28,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:28,638 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] [2023-04-01 00:30:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:30:28,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:28,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash -525507692, now seen corresponding path program 1 times [2023-04-01 00:30:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800762734] [2023-04-01 00:30:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:28,780 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 00:30:28,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800762734] [2023-04-01 00:30:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800762734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552501553] [2023-04-01 00:30:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:28,787 INFO L87 Difference]: Start difference. First operand 2213 states and 3227 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:29,614 INFO L93 Difference]: Finished difference Result 6355 states and 9343 transitions. [2023-04-01 00:30:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:30:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:29,633 INFO L225 Difference]: With dead ends: 6355 [2023-04-01 00:30:29,634 INFO L226 Difference]: Without dead ends: 4227 [2023-04-01 00:30:29,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:29,641 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 557 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:29,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 247 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2023-04-01 00:30:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2023-04-01 00:30:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4221 states have (on average 1.4593698175787728) internal successors, (6160), 4221 states have internal predecessors, (6160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 6163 transitions. [2023-04-01 00:30:30,221 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 6163 transitions. Word has length 73 [2023-04-01 00:30:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:30,221 INFO L495 AbstractCegarLoop]: Abstraction has 4225 states and 6163 transitions. [2023-04-01 00:30:30,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 6163 transitions. [2023-04-01 00:30:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:30:30,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:30,223 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] [2023-04-01 00:30:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:30:30,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:30,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 920424773, now seen corresponding path program 1 times [2023-04-01 00:30:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159726341] [2023-04-01 00:30:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:30,333 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 00:30:30,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159726341] [2023-04-01 00:30:30,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159726341] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:30,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:30,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:30:30,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130852207] [2023-04-01 00:30:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:30,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:30:30,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:30,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:30:30,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:30:30,335 INFO L87 Difference]: Start difference. First operand 4225 states and 6163 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:31,521 INFO L93 Difference]: Finished difference Result 12414 states and 18188 transitions. [2023-04-01 00:30:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:30:31,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-01 00:30:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:31,562 INFO L225 Difference]: With dead ends: 12414 [2023-04-01 00:30:31,562 INFO L226 Difference]: Without dead ends: 8251 [2023-04-01 00:30:31,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:30:31,574 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 562 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:31,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 239 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:30:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2023-04-01 00:30:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8249. [2023-04-01 00:30:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8249 states, 8245 states have (on average 1.4516676773802304) internal successors, (11969), 8245 states have internal predecessors, (11969), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 11972 transitions. [2023-04-01 00:30:32,688 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 11972 transitions. Word has length 73 [2023-04-01 00:30:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:32,688 INFO L495 AbstractCegarLoop]: Abstraction has 8249 states and 11972 transitions. [2023-04-01 00:30:32,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 11972 transitions. [2023-04-01 00:30:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:30:32,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:32,694 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] [2023-04-01 00:30:32,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:30:32,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:32,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:32,695 INFO L85 PathProgramCache]: Analyzing trace with hash 361009291, now seen corresponding path program 1 times [2023-04-01 00:30:32,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:32,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856642613] [2023-04-01 00:30:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:32,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:34,433 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 00:30:34,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856642613] [2023-04-01 00:30:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856642613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:34,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:30:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067612522] [2023-04-01 00:30:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:30:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:30:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:30:34,435 INFO L87 Difference]: Start difference. First operand 8249 states and 11972 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:38,343 INFO L93 Difference]: Finished difference Result 21198 states and 30747 transitions. [2023-04-01 00:30:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:30:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 00:30:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:38,406 INFO L225 Difference]: With dead ends: 21198 [2023-04-01 00:30:38,407 INFO L226 Difference]: Without dead ends: 21196 [2023-04-01 00:30:38,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2023-04-01 00:30:38,415 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1612 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:38,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 1058 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:30:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2023-04-01 00:30:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 16320. [2023-04-01 00:30:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16320 states, 16316 states have (on average 1.4463716597205198) internal successors, (23599), 16316 states have internal predecessors, (23599), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16320 states to 16320 states and 23602 transitions. [2023-04-01 00:30:40,599 INFO L78 Accepts]: Start accepts. Automaton has 16320 states and 23602 transitions. Word has length 74 [2023-04-01 00:30:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 16320 states and 23602 transitions. [2023-04-01 00:30:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16320 states and 23602 transitions. [2023-04-01 00:30:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:30:40,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:40,601 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] [2023-04-01 00:30:40,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:30:40,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:40,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash 565900715, now seen corresponding path program 1 times [2023-04-01 00:30:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969006582] [2023-04-01 00:30:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:40,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:42,809 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 00:30:42,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969006582] [2023-04-01 00:30:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969006582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:42,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-01 00:30:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834097565] [2023-04-01 00:30:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 00:30:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 00:30:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-04-01 00:30:42,811 INFO L87 Difference]: Start difference. First operand 16320 states and 23602 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:48,979 INFO L93 Difference]: Finished difference Result 31736 states and 45894 transitions. [2023-04-01 00:30:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 00:30:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 00:30:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:49,068 INFO L225 Difference]: With dead ends: 31736 [2023-04-01 00:30:49,069 INFO L226 Difference]: Without dead ends: 29718 [2023-04-01 00:30:49,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 00:30:49,084 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1357 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:49,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 2286 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 00:30:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29718 states. [2023-04-01 00:30:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29718 to 16350. [2023-04-01 00:30:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16346 states have (on average 1.4460418450997186) internal successors, (23637), 16346 states have internal predecessors, (23637), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 23640 transitions. [2023-04-01 00:30:51,747 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 23640 transitions. Word has length 74 [2023-04-01 00:30:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:51,747 INFO L495 AbstractCegarLoop]: Abstraction has 16350 states and 23640 transitions. [2023-04-01 00:30:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 23640 transitions. [2023-04-01 00:30:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:30:51,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:51,748 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] [2023-04-01 00:30:51,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:30:51,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:51,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash 651641355, now seen corresponding path program 1 times [2023-04-01 00:30:51,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:51,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794912469] [2023-04-01 00:30:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:30:53,057 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 00:30:53,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:30:53,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794912469] [2023-04-01 00:30:53,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794912469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:30:53,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:30:53,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:30:53,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281415693] [2023-04-01 00:30:53,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:30:53,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:30:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:30:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:30:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:30:53,059 INFO L87 Difference]: Start difference. First operand 16350 states and 23640 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:30:56,444 INFO L93 Difference]: Finished difference Result 19676 states and 28343 transitions. [2023-04-01 00:30:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:30:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 00:30:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:30:56,498 INFO L225 Difference]: With dead ends: 19676 [2023-04-01 00:30:56,498 INFO L226 Difference]: Without dead ends: 19674 [2023-04-01 00:30:56,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2023-04-01 00:30:56,508 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1125 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:30:56,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1783 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:30:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19674 states. [2023-04-01 00:30:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19674 to 16368. [2023-04-01 00:30:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16368 states, 16364 states have (on average 1.445673429479345) internal successors, (23657), 16364 states have internal predecessors, (23657), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16368 states to 16368 states and 23660 transitions. [2023-04-01 00:30:59,140 INFO L78 Accepts]: Start accepts. Automaton has 16368 states and 23660 transitions. Word has length 74 [2023-04-01 00:30:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:30:59,140 INFO L495 AbstractCegarLoop]: Abstraction has 16368 states and 23660 transitions. [2023-04-01 00:30:59,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:30:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 16368 states and 23660 transitions. [2023-04-01 00:30:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:30:59,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:30:59,142 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] [2023-04-01 00:30:59,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:30:59,142 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:30:59,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:30:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -633444021, now seen corresponding path program 1 times [2023-04-01 00:30:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:30:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571747873] [2023-04-01 00:30:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:30:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:30:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:00,351 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 00:31:00,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571747873] [2023-04-01 00:31:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571747873] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:31:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831105376] [2023-04-01 00:31:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:31:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:31:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:31:00,353 INFO L87 Difference]: Start difference. First operand 16368 states and 23660 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:04,737 INFO L93 Difference]: Finished difference Result 24011 states and 34669 transitions. [2023-04-01 00:31:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:31:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 00:31:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:04,788 INFO L225 Difference]: With dead ends: 24011 [2023-04-01 00:31:04,789 INFO L226 Difference]: Without dead ends: 24009 [2023-04-01 00:31:04,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-04-01 00:31:04,802 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1024 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:04,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 2355 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 00:31:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24009 states. [2023-04-01 00:31:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24009 to 16390. [2023-04-01 00:31:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16390 states, 16386 states have (on average 1.4453802026119857) internal successors, (23684), 16386 states have internal predecessors, (23684), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 23687 transitions. [2023-04-01 00:31:07,509 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 23687 transitions. Word has length 74 [2023-04-01 00:31:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:07,509 INFO L495 AbstractCegarLoop]: Abstraction has 16390 states and 23687 transitions. [2023-04-01 00:31:07,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 23687 transitions. [2023-04-01 00:31:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:31:07,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:07,511 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] [2023-04-01 00:31:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:31:07,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:07,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 649698539, now seen corresponding path program 1 times [2023-04-01 00:31:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:07,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532032148] [2023-04-01 00:31:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:08,659 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 00:31:08,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532032148] [2023-04-01 00:31:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532032148] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:08,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:08,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:31:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460343760] [2023-04-01 00:31:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:08,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:31:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:31:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:31:08,661 INFO L87 Difference]: Start difference. First operand 16390 states and 23687 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:13,204 INFO L93 Difference]: Finished difference Result 26747 states and 38657 transitions. [2023-04-01 00:31:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:31:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 00:31:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:13,268 INFO L225 Difference]: With dead ends: 26747 [2023-04-01 00:31:13,268 INFO L226 Difference]: Without dead ends: 26745 [2023-04-01 00:31:13,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-04-01 00:31:13,282 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1155 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:13,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 1757 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:31:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2023-04-01 00:31:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 16416. [2023-04-01 00:31:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16416 states, 16412 states have (on average 1.4451011455032903) internal successors, (23717), 16412 states have internal predecessors, (23717), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16416 states to 16416 states and 23720 transitions. [2023-04-01 00:31:15,875 INFO L78 Accepts]: Start accepts. Automaton has 16416 states and 23720 transitions. Word has length 74 [2023-04-01 00:31:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:15,875 INFO L495 AbstractCegarLoop]: Abstraction has 16416 states and 23720 transitions. [2023-04-01 00:31:15,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:31:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16416 states and 23720 transitions. [2023-04-01 00:31:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:31:15,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:15,877 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] [2023-04-01 00:31:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:31:15,877 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:15,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1774649952, now seen corresponding path program 1 times [2023-04-01 00:31:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365276558] [2023-04-01 00:31:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat