/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:15:01,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:15:01,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:15:01,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:15:01,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:15:01,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:15:01,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:15:01,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:15:01,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:15:01,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:15:01,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:15:01,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:15:01,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:15:01,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:15:01,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:15:01,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:15:01,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:15:01,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:15:01,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:15:01,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:15:01,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:15:01,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:15:01,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:15:01,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:15:01,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:15:01,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:15:01,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:15:01,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:15:01,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:15:01,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:15:01,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:15:01,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:15:01,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:15:01,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:15:01,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:15:01,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:15:01,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:15:01,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:15:01,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:15:01,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:15:01,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:15:01,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:15:01,562 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:15:01,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:15:01,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:15:01,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:15:01,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:15:01,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:15:01,563 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:15:01,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:15:01,564 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:15:01,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:15:01,564 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:15:01,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:15:01,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:15:01,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:15:01,565 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:15:01,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:15:01,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:01,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:15:01,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:15:01,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:15:01,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:15:01,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:15:01,775 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:15:01,775 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:15:01,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:02,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:15:03,019 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:15:03,019 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:03,031 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392cd463e/a8ee33a90e884701b62271a0b51d1e62/FLAG93c6e91c2 [2023-04-01 06:15:03,041 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392cd463e/a8ee33a90e884701b62271a0b51d1e62 [2023-04-01 06:15:03,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:15:03,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:15:03,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:03,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:15:03,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:15:03,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd12403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03, skipping insertion in model container [2023-04-01 06:15:03,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:15:03,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:15:03,336 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2023-04-01 06:15:03,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:03,348 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:15:03,414 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2023-04-01 06:15:03,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:03,439 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:15:03,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03 WrapperNode [2023-04-01 06:15:03,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:03,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:15:03,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:15:03,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:15:03,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:15:03,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:15:03,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:15:03,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:15:03,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (1/1) ... [2023-04-01 06:15:03,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:15:03,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:15:03,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:15:03,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:15:03,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:15:03,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:15:03,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:15:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:15:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:15:03,706 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:15:03,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:15:04,464 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:15:04,940 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:15:04,940 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:15:04,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:04 BoogieIcfgContainer [2023-04-01 06:15:04,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:15:04,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:15:04,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:15:04,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:15:04,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:15:03" (1/3) ... [2023-04-01 06:15:04,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab8b0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:04, skipping insertion in model container [2023-04-01 06:15:04,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:03" (2/3) ... [2023-04-01 06:15:04,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab8b0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:04, skipping insertion in model container [2023-04-01 06:15:04,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:04" (3/3) ... [2023-04-01 06:15:04,949 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2023-04-01 06:15:04,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:15:04,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:15:05,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:15:05,043 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;@1146a0a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:15:05,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:15:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 06:15:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:15:05,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:05,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:05,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:05,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1613895835, now seen corresponding path program 1 times [2023-04-01 06:15:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:05,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075946442] [2023-04-01 06:15:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:10,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:10,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075946442] [2023-04-01 06:15:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075946442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:10,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 06:15:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766607203] [2023-04-01 06:15:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:10,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 06:15:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 06:15:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:15:10,050 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:11,946 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-01 06:15:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 06:15:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 06:15:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:11,955 INFO L225 Difference]: With dead ends: 266 [2023-04-01 06:15:11,956 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 06:15:11,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:15:11,963 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:11,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 06:15:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 06:15:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-01 06:15:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 06:15:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-01 06:15:12,009 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-01 06:15:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:12,009 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-01 06:15:12,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-01 06:15:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:15:12,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:12,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:12,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:15:12,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:12,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1092511881, now seen corresponding path program 1 times [2023-04-01 06:15:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:12,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342748384] [2023-04-01 06:15:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:13,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342748384] [2023-04-01 06:15:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342748384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:13,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:13,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786794785] [2023-04-01 06:15:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:13,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:13,987 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:14,921 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-01 06:15:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 06:15:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:14,924 INFO L225 Difference]: With dead ends: 277 [2023-04-01 06:15:14,924 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 06:15:14,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:14,925 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:14,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 06:15:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-01 06:15:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-01 06:15:14,954 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-01 06:15:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:14,955 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-01 06:15:14,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-01 06:15:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:15:14,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:14,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:15:14,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:14,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash 198516558, now seen corresponding path program 1 times [2023-04-01 06:15:14,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:14,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379822740] [2023-04-01 06:15:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:16,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379822740] [2023-04-01 06:15:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379822740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122669215] [2023-04-01 06:15:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:16,766 INFO L87 Difference]: Start difference. First operand 201 states and 293 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:17,754 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-01 06:15:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 06:15:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:17,757 INFO L225 Difference]: With dead ends: 271 [2023-04-01 06:15:17,757 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 06:15:17,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:17,758 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:17,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:15:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 06:15:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-01 06:15:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-01 06:15:17,775 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-01 06:15:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:17,777 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-01 06:15:17,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-01 06:15:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:15:17,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:17,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:17,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:15:17,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:17,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -638823278, now seen corresponding path program 1 times [2023-04-01 06:15:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412841707] [2023-04-01 06:15:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:17,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:19,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412841707] [2023-04-01 06:15:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412841707] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:19,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492359791] [2023-04-01 06:15:19,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:19,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:19,508 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:20,562 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-01 06:15:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 06:15:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:20,564 INFO L225 Difference]: With dead ends: 277 [2023-04-01 06:15:20,564 INFO L226 Difference]: Without dead ends: 237 [2023-04-01 06:15:20,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:20,565 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:20,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 97 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:15:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-01 06:15:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-01 06:15:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-01 06:15:20,583 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-01 06:15:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:20,583 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-01 06:15:20,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-01 06:15:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 06:15:20,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:20,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:15:20,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:20,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 280156983, now seen corresponding path program 1 times [2023-04-01 06:15:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466666096] [2023-04-01 06:15:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:22,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:22,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466666096] [2023-04-01 06:15:22,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466666096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483791790] [2023-04-01 06:15:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:22,282 INFO L87 Difference]: Start difference. First operand 201 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:23,337 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-01 06:15:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 06:15:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:23,338 INFO L225 Difference]: With dead ends: 283 [2023-04-01 06:15:23,338 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 06:15:23,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:23,340 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 576 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:23,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 100 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:15:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 06:15:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-01 06:15:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-01 06:15:23,363 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-01 06:15:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:23,364 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-01 06:15:23,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-01 06:15:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:15:23,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:23,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:23,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:15:23,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:23,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash 855801791, now seen corresponding path program 1 times [2023-04-01 06:15:23,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:23,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575284856] [2023-04-01 06:15:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:26,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575284856] [2023-04-01 06:15:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575284856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:15:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700038613] [2023-04-01 06:15:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:15:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:15:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:15:26,302 INFO L87 Difference]: Start difference. First operand 201 states and 290 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:28,294 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2023-04-01 06:15:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 06:15:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 06:15:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:28,296 INFO L225 Difference]: With dead ends: 295 [2023-04-01 06:15:28,296 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 06:15:28,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:15:28,304 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1790 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 155 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 06:15:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 06:15:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-04-01 06:15:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 176 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2023-04-01 06:15:28,333 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 91 [2023-04-01 06:15:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:28,333 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2023-04-01 06:15:28,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2023-04-01 06:15:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:15:28,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:28,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:15:28,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:28,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash -726786231, now seen corresponding path program 1 times [2023-04-01 06:15:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375062440] [2023-04-01 06:15:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:28,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:30,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375062440] [2023-04-01 06:15:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375062440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:30,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:30,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256388828] [2023-04-01 06:15:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:30,231 INFO L87 Difference]: Start difference. First operand 205 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:31,300 INFO L93 Difference]: Finished difference Result 294 states and 404 transitions. [2023-04-01 06:15:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:15:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 06:15:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:31,302 INFO L225 Difference]: With dead ends: 294 [2023-04-01 06:15:31,303 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 06:15:31,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:15:31,303 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 564 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:31,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 102 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:15:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 06:15:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2023-04-01 06:15:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-01 06:15:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-01 06:15:31,327 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-01 06:15:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:31,327 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-01 06:15:31,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-01 06:15:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 06:15:31,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:31,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:15:31,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:31,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1577658737, now seen corresponding path program 1 times [2023-04-01 06:15:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307611568] [2023-04-01 06:15:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:35,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:35,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307611568] [2023-04-01 06:15:35,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307611568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:35,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:35,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-01 06:15:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090280164] [2023-04-01 06:15:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 06:15:35,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:35,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 06:15:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-04-01 06:15:35,179 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:15:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:39,317 INFO L93 Difference]: Finished difference Result 838 states and 1132 transitions. [2023-04-01 06:15:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-04-01 06:15:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 94 [2023-04-01 06:15:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:39,320 INFO L225 Difference]: With dead ends: 838 [2023-04-01 06:15:39,320 INFO L226 Difference]: Without dead ends: 640 [2023-04-01 06:15:39,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1012, Invalid=5150, Unknown=0, NotChecked=0, Total=6162 [2023-04-01 06:15:39,323 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4978 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4990 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:39,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4990 Valid, 205 Invalid, 3481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 06:15:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-04-01 06:15:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 435. [2023-04-01 06:15:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 379 states have (on average 1.4802110817941954) internal successors, (561), 382 states have internal predecessors, (561), 27 states have call successors, (27), 27 states have call predecessors, (27), 28 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2023-04-01 06:15:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 617 transitions. [2023-04-01 06:15:39,377 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 617 transitions. Word has length 94 [2023-04-01 06:15:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 617 transitions. [2023-04-01 06:15:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:15:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 617 transitions. [2023-04-01 06:15:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:15:39,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:39,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:39,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:15:39,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:39,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:39,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1192173294, now seen corresponding path program 1 times [2023-04-01 06:15:39,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:39,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189855497] [2023-04-01 06:15:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:40,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189855497] [2023-04-01 06:15:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189855497] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:40,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:40,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 06:15:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276998556] [2023-04-01 06:15:40,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:40,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:15:40,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:15:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:15:40,901 INFO L87 Difference]: Start difference. First operand 435 states and 617 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:41,327 INFO L93 Difference]: Finished difference Result 471 states and 662 transitions. [2023-04-01 06:15:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:15:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 06:15:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:41,329 INFO L225 Difference]: With dead ends: 471 [2023-04-01 06:15:41,329 INFO L226 Difference]: Without dead ends: 469 [2023-04-01 06:15:41,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:15:41,330 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 35 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:41,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2667 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:15:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-04-01 06:15:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 445. [2023-04-01 06:15:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 385 states have (on average 1.4727272727272727) internal successors, (567), 390 states have internal predecessors, (567), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-01 06:15:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 627 transitions. [2023-04-01 06:15:41,392 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 627 transitions. Word has length 95 [2023-04-01 06:15:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:41,393 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 627 transitions. [2023-04-01 06:15:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 627 transitions. [2023-04-01 06:15:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 06:15:41,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:41,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:41,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:15:41,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:41,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1069738731, now seen corresponding path program 1 times [2023-04-01 06:15:41,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947640401] [2023-04-01 06:15:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:41,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:41,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:41,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947640401] [2023-04-01 06:15:41,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947640401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:41,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:41,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:15:41,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642768988] [2023-04-01 06:15:41,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:15:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:15:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:15:41,462 INFO L87 Difference]: Start difference. First operand 445 states and 627 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:41,614 INFO L93 Difference]: Finished difference Result 1049 states and 1505 transitions. [2023-04-01 06:15:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:15:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-04-01 06:15:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:41,617 INFO L225 Difference]: With dead ends: 1049 [2023-04-01 06:15:41,617 INFO L226 Difference]: Without dead ends: 673 [2023-04-01 06:15:41,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:15:41,618 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 131 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:41,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 429 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:15:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-04-01 06:15:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 459. [2023-04-01 06:15:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 399 states have (on average 1.4661654135338347) internal successors, (585), 404 states have internal predecessors, (585), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-01 06:15:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 645 transitions. [2023-04-01 06:15:41,673 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 645 transitions. Word has length 96 [2023-04-01 06:15:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:41,674 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 645 transitions. [2023-04-01 06:15:41,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 645 transitions. [2023-04-01 06:15:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 06:15:41,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:41,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:41,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:15:41,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:41,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 95779284, now seen corresponding path program 1 times [2023-04-01 06:15:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:41,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976654865] [2023-04-01 06:15:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:45,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:45,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976654865] [2023-04-01 06:15:45,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976654865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:45,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:45,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-01 06:15:45,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912615675] [2023-04-01 06:15:45,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:45,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 06:15:45,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 06:15:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-04-01 06:15:45,306 INFO L87 Difference]: Start difference. First operand 459 states and 645 transitions. Second operand has 26 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:15:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:51,256 INFO L93 Difference]: Finished difference Result 1080 states and 1424 transitions. [2023-04-01 06:15:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-04-01 06:15:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 96 [2023-04-01 06:15:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:51,260 INFO L225 Difference]: With dead ends: 1080 [2023-04-01 06:15:51,260 INFO L226 Difference]: Without dead ends: 997 [2023-04-01 06:15:51,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3207 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1695, Invalid=8811, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 06:15:51,262 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 2643 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2653 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2653 Valid, 357 Invalid, 4670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 06:15:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-04-01 06:15:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 530. [2023-04-01 06:15:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 470 states have (on average 1.4893617021276595) internal successors, (700), 475 states have internal predecessors, (700), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-01 06:15:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 760 transitions. [2023-04-01 06:15:51,334 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 760 transitions. Word has length 96 [2023-04-01 06:15:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:51,334 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 760 transitions. [2023-04-01 06:15:51,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:15:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 760 transitions. [2023-04-01 06:15:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 06:15:51,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:51,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:15:51,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:51,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1186758740, now seen corresponding path program 1 times [2023-04-01 06:15:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:51,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53442100] [2023-04-01 06:15:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat