/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:35:35,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:35:35,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:35:35,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:35:35,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:35:35,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:35:35,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:35:35,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:35:35,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:35:35,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:35:35,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:35:35,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:35:35,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:35:35,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:35:35,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:35:35,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:35:35,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:35:35,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:35:35,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:35:35,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:35:35,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:35:35,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:35:35,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:35:35,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:35:35,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:35:35,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:35:35,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:35:35,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:35:35,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:35:35,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:35:35,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:35:35,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:35:35,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:35:35,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:35:35,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:35:35,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:35:35,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:35:35,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:35:35,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:35:35,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:35:35,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:35:35,282 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 12:35:35,298 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:35:35,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:35:35,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:35:35,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:35:35,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:35:35,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:35:35,300 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:35:35,300 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:35:35,300 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:35:35,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:35:35,302 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:35:35,302 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:35:35,302 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:35:35,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:35:35,302 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:35:35,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:35:35,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:35:35,303 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:35:35,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:35:35,304 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:35:35,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:35:35,305 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:35:35,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:35:35,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:35:35,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:35:35,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:35,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:35:35,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:35:35,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:35:35,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:35:35,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:35:35,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:35:35,561 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:35:35,562 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:35:35,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:35:36,696 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:35:37,022 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:35:37,023 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:35:37,037 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d29f60d8/f9a2a3f987cb42e4a924146fda721785/FLAG2a6004975 [2023-04-01 12:35:37,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d29f60d8/f9a2a3f987cb42e4a924146fda721785 [2023-04-01 12:35:37,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:35:37,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:35:37,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:37,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:35:37,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:35:37,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:37" (1/1) ... [2023-04-01 12:35:37,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9c0833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:37, skipping insertion in model container [2023-04-01 12:35:37,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:37" (1/1) ... [2023-04-01 12:35:37,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:35:37,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:35:37,544 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2023-04-01 12:35:37,605 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2023-04-01 12:35:37,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:37,812 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:35:38,155 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2023-04-01 12:35:38,221 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2023-04-01 12:35:38,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:38,369 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:35:38,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38 WrapperNode [2023-04-01 12:35:38,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:38,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:35:38,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:35:38,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:35:38,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:35:38,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:35:38,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:35:38,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:35:38,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (1/1) ... [2023-04-01 12:35:38,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:35:38,550 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 12:35:38,572 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 12:35:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:35:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:35:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:35:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:35:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:35:38,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:35:38,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:35:38,598 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:35:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:35:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:35:38,768 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:35:38,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:35:40,676 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:35:41,590 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:35:41,592 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:35:41,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:41 BoogieIcfgContainer [2023-04-01 12:35:41,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:35:41,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:35:41,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:35:41,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:35:41,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:35:37" (1/3) ... [2023-04-01 12:35:41,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef3e353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:41, skipping insertion in model container [2023-04-01 12:35:41,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:38" (2/3) ... [2023-04-01 12:35:41,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef3e353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:41, skipping insertion in model container [2023-04-01 12:35:41,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:41" (3/3) ... [2023-04-01 12:35:41,604 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:35:41,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:35:41,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-01 12:35:41,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:35:41,681 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;@54992bb5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:35:41,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-01 12:35:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 875 states, 779 states have (on average 1.662387676508344) internal successors, (1295), 870 states have internal predecessors, (1295), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:35:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 12:35:41,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:41,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:41,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:41,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash 593829724, now seen corresponding path program 1 times [2023-04-01 12:35:41,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:41,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727610357] [2023-04-01 12:35:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:42,557 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 12:35:42,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:42,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727610357] [2023-04-01 12:35:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727610357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:42,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:42,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:42,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984489620] [2023-04-01 12:35:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:42,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:42,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:42,589 INFO L87 Difference]: Start difference. First operand has 875 states, 779 states have (on average 1.662387676508344) internal successors, (1295), 870 states have internal predecessors, (1295), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:42,968 INFO L93 Difference]: Finished difference Result 1545 states and 2319 transitions. [2023-04-01 12:35:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:35:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-01 12:35:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:42,980 INFO L225 Difference]: With dead ends: 1545 [2023-04-01 12:35:42,980 INFO L226 Difference]: Without dead ends: 782 [2023-04-01 12:35:42,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:42,987 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 1016 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:42,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 2684 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-04-01 12:35:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2023-04-01 12:35:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 777 states have (on average 1.5366795366795367) internal successors, (1194), 778 states have internal predecessors, (1194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1197 transitions. [2023-04-01 12:35:43,056 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1197 transitions. Word has length 105 [2023-04-01 12:35:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:43,057 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1197 transitions. [2023-04-01 12:35:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1197 transitions. [2023-04-01 12:35:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 12:35:43,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:43,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:35:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:35:43,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:43,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -151308269, now seen corresponding path program 1 times [2023-04-01 12:35:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:43,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053260979] [2023-04-01 12:35:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:43,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:43,297 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 12:35:43,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:43,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053260979] [2023-04-01 12:35:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053260979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409045991] [2023-04-01 12:35:43,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:43,304 INFO L87 Difference]: Start difference. First operand 782 states and 1197 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:43,558 INFO L93 Difference]: Finished difference Result 1800 states and 2780 transitions. [2023-04-01 12:35:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2023-04-01 12:35:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:43,570 INFO L225 Difference]: With dead ends: 1800 [2023-04-01 12:35:43,570 INFO L226 Difference]: Without dead ends: 1205 [2023-04-01 12:35:43,571 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 12:35:43,573 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 836 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:43,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 2077 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2023-04-01 12:35:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1201. [2023-04-01 12:35:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1196 states have (on average 1.540133779264214) internal successors, (1842), 1197 states have internal predecessors, (1842), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1845 transitions. [2023-04-01 12:35:43,677 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1845 transitions. Word has length 146 [2023-04-01 12:35:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:43,678 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1845 transitions. [2023-04-01 12:35:43,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1845 transitions. [2023-04-01 12:35:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 12:35:43,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:43,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:43,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:35:43,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:43,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash -473988565, now seen corresponding path program 1 times [2023-04-01 12:35:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121464809] [2023-04-01 12:35:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:43,945 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 12:35:43,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121464809] [2023-04-01 12:35:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121464809] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:43,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:43,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785153] [2023-04-01 12:35:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:43,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:43,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:43,948 INFO L87 Difference]: Start difference. First operand 1201 states and 1845 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:44,300 INFO L93 Difference]: Finished difference Result 2647 states and 4097 transitions. [2023-04-01 12:35:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:44,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2023-04-01 12:35:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:44,308 INFO L225 Difference]: With dead ends: 2647 [2023-04-01 12:35:44,308 INFO L226 Difference]: Without dead ends: 1632 [2023-04-01 12:35:44,311 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 12:35:44,314 INFO L413 NwaCegarLoop]: 1842 mSDtfsCounter, 915 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:44,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 2737 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2023-04-01 12:35:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1628. [2023-04-01 12:35:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1623 states have (on average 1.5323475046210722) internal successors, (2487), 1624 states have internal predecessors, (2487), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2490 transitions. [2023-04-01 12:35:44,424 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2490 transitions. Word has length 152 [2023-04-01 12:35:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:44,425 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 2490 transitions. [2023-04-01 12:35:44,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2490 transitions. [2023-04-01 12:35:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 12:35:44,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:44,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:44,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:35:44,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:44,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -865224931, now seen corresponding path program 1 times [2023-04-01 12:35:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:44,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826633151] [2023-04-01 12:35:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:44,588 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 12:35:44,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:44,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826633151] [2023-04-01 12:35:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826633151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:44,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211600748] [2023-04-01 12:35:44,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:44,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:44,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:44,590 INFO L87 Difference]: Start difference. First operand 1628 states and 2490 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:44,860 INFO L93 Difference]: Finished difference Result 4115 states and 6311 transitions. [2023-04-01 12:35:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2023-04-01 12:35:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:44,869 INFO L225 Difference]: With dead ends: 4115 [2023-04-01 12:35:44,870 INFO L226 Difference]: Without dead ends: 2692 [2023-04-01 12:35:44,872 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 12:35:44,873 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 828 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:44,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 2039 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2023-04-01 12:35:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2688. [2023-04-01 12:35:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2683 states have (on average 1.5270219903093551) internal successors, (4097), 2684 states have internal predecessors, (4097), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4100 transitions. [2023-04-01 12:35:45,083 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4100 transitions. Word has length 155 [2023-04-01 12:35:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:45,084 INFO L495 AbstractCegarLoop]: Abstraction has 2688 states and 4100 transitions. [2023-04-01 12:35:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4100 transitions. [2023-04-01 12:35:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 12:35:45,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:45,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:35:45,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:35:45,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:45,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1454802197, now seen corresponding path program 1 times [2023-04-01 12:35:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085624897] [2023-04-01 12:35:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:45,313 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 12:35:45,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085624897] [2023-04-01 12:35:45,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085624897] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:45,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:45,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502484152] [2023-04-01 12:35:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:45,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:45,320 INFO L87 Difference]: Start difference. First operand 2688 states and 4100 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:45,811 INFO L93 Difference]: Finished difference Result 6351 states and 9724 transitions. [2023-04-01 12:35:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2023-04-01 12:35:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:45,826 INFO L225 Difference]: With dead ends: 6351 [2023-04-01 12:35:45,826 INFO L226 Difference]: Without dead ends: 3867 [2023-04-01 12:35:45,832 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 12:35:45,834 INFO L413 NwaCegarLoop]: 1864 mSDtfsCounter, 930 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:45,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2774 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2023-04-01 12:35:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3863. [2023-04-01 12:35:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3858 states have (on average 1.5282529808190772) internal successors, (5896), 3859 states have internal predecessors, (5896), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 5899 transitions. [2023-04-01 12:35:46,061 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 5899 transitions. Word has length 161 [2023-04-01 12:35:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:46,061 INFO L495 AbstractCegarLoop]: Abstraction has 3863 states and 5899 transitions. [2023-04-01 12:35:46,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 5899 transitions. [2023-04-01 12:35:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 12:35:46,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:46,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:35:46,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:46,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash 695633949, now seen corresponding path program 1 times [2023-04-01 12:35:46,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:46,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178840453] [2023-04-01 12:35:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:46,240 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 12:35:46,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178840453] [2023-04-01 12:35:46,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178840453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143513570] [2023-04-01 12:35:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:46,242 INFO L87 Difference]: Start difference. First operand 3863 states and 5899 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:46,787 INFO L93 Difference]: Finished difference Result 10220 states and 15589 transitions. [2023-04-01 12:35:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:46,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2023-04-01 12:35:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:46,809 INFO L225 Difference]: With dead ends: 10220 [2023-04-01 12:35:46,809 INFO L226 Difference]: Without dead ends: 6580 [2023-04-01 12:35:46,815 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 12:35:46,817 INFO L413 NwaCegarLoop]: 1340 mSDtfsCounter, 818 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:46,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 2219 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2023-04-01 12:35:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6576. [2023-04-01 12:35:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6571 states have (on average 1.5162075787551361) internal successors, (9963), 6572 states have internal predecessors, (9963), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 9966 transitions. [2023-04-01 12:35:47,224 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 9966 transitions. Word has length 164 [2023-04-01 12:35:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:47,224 INFO L495 AbstractCegarLoop]: Abstraction has 6576 states and 9966 transitions. [2023-04-01 12:35:47,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 9966 transitions. [2023-04-01 12:35:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 12:35:47,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:47,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:47,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:35:47,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:47,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -382611931, now seen corresponding path program 1 times [2023-04-01 12:35:47,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969106370] [2023-04-01 12:35:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:47,427 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 12:35:47,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969106370] [2023-04-01 12:35:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969106370] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:47,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085642851] [2023-04-01 12:35:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:47,429 INFO L87 Difference]: Start difference. First operand 6576 states and 9966 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:48,247 INFO L93 Difference]: Finished difference Result 16093 states and 24454 transitions. [2023-04-01 12:35:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2023-04-01 12:35:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:48,291 INFO L225 Difference]: With dead ends: 16093 [2023-04-01 12:35:48,291 INFO L226 Difference]: Without dead ends: 9739 [2023-04-01 12:35:48,301 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 12:35:48,302 INFO L413 NwaCegarLoop]: 1834 mSDtfsCounter, 921 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:48,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 2717 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2023-04-01 12:35:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9735. [2023-04-01 12:35:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9735 states, 9730 states have (on average 1.5164439876670093) internal successors, (14755), 9731 states have internal predecessors, (14755), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9735 states to 9735 states and 14758 transitions. [2023-04-01 12:35:48,922 INFO L78 Accepts]: Start accepts. Automaton has 9735 states and 14758 transitions. Word has length 170 [2023-04-01 12:35:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:48,922 INFO L495 AbstractCegarLoop]: Abstraction has 9735 states and 14758 transitions. [2023-04-01 12:35:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9735 states and 14758 transitions. [2023-04-01 12:35:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 12:35:48,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:48,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:48,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:35:48,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:48,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1318169807, now seen corresponding path program 1 times [2023-04-01 12:35:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16413822] [2023-04-01 12:35:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:48,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:49,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16413822] [2023-04-01 12:35:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16413822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:49,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:49,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702922639] [2023-04-01 12:35:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,059 INFO L87 Difference]: Start difference. First operand 9735 states and 14758 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:50,381 INFO L93 Difference]: Finished difference Result 26144 states and 39483 transitions. [2023-04-01 12:35:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2023-04-01 12:35:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:50,415 INFO L225 Difference]: With dead ends: 26144 [2023-04-01 12:35:50,416 INFO L226 Difference]: Without dead ends: 16650 [2023-04-01 12:35:50,438 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 12:35:50,440 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 812 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:50,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1979 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2023-04-01 12:35:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 16646. [2023-04-01 12:35:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16646 states, 16641 states have (on average 1.49840754762334) internal successors, (24935), 16642 states have internal predecessors, (24935), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16646 states to 16646 states and 24938 transitions. [2023-04-01 12:35:51,617 INFO L78 Accepts]: Start accepts. Automaton has 16646 states and 24938 transitions. Word has length 173 [2023-04-01 12:35:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:51,618 INFO L495 AbstractCegarLoop]: Abstraction has 16646 states and 24938 transitions. [2023-04-01 12:35:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16646 states and 24938 transitions. [2023-04-01 12:35:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 12:35:51,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:51,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:51,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:35:51,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:51,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1090480281, now seen corresponding path program 1 times [2023-04-01 12:35:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:51,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516450129] [2023-04-01 12:35:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:51,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:51,822 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 12:35:51,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516450129] [2023-04-01 12:35:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516450129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:51,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:51,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908357564] [2023-04-01 12:35:51,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:51,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:51,824 INFO L87 Difference]: Start difference. First operand 16646 states and 24938 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:53,642 INFO L93 Difference]: Finished difference Result 41435 states and 62228 transitions. [2023-04-01 12:35:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2023-04-01 12:35:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:53,703 INFO L225 Difference]: With dead ends: 41435 [2023-04-01 12:35:53,704 INFO L226 Difference]: Without dead ends: 25029 [2023-04-01 12:35:53,736 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 12:35:53,737 INFO L413 NwaCegarLoop]: 1804 mSDtfsCounter, 912 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 2660 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25029 states. [2023-04-01 12:35:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25029 to 25025. [2023-04-01 12:35:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25025 states, 25020 states have (on average 1.4984012789768186) internal successors, (37490), 25021 states have internal predecessors, (37490), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25025 states to 25025 states and 37493 transitions. [2023-04-01 12:35:55,472 INFO L78 Accepts]: Start accepts. Automaton has 25025 states and 37493 transitions. Word has length 179 [2023-04-01 12:35:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:55,472 INFO L495 AbstractCegarLoop]: Abstraction has 25025 states and 37493 transitions. [2023-04-01 12:35:55,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25025 states and 37493 transitions. [2023-04-01 12:35:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-01 12:35:55,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:55,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:55,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:35:55,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:55,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1925300205, now seen corresponding path program 1 times [2023-04-01 12:35:55,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:55,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967911609] [2023-04-01 12:35:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:55,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:55,740 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 12:35:55,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967911609] [2023-04-01 12:35:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967911609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:35:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512962180] [2023-04-01 12:35:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:35:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:35:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:35:55,742 INFO L87 Difference]: Start difference. First operand 25025 states and 37493 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:59,997 INFO L93 Difference]: Finished difference Result 63057 states and 94675 transitions. [2023-04-01 12:35:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:35:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2023-04-01 12:35:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:00,090 INFO L225 Difference]: With dead ends: 63057 [2023-04-01 12:36:00,090 INFO L226 Difference]: Without dead ends: 38007 [2023-04-01 12:36:00,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:36:00,136 INFO L413 NwaCegarLoop]: 5485 mSDtfsCounter, 3586 mSDsluCounter, 11085 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3586 SdHoareTripleChecker+Valid, 16570 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:00,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3586 Valid, 16570 Invalid, 1725 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:36:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38007 states. [2023-04-01 12:36:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38007 to 37764. [2023-04-01 12:36:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37764 states, 37759 states have (on average 1.5009666569559574) internal successors, (56675), 37760 states have internal predecessors, (56675), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37764 states to 37764 states and 56678 transitions. [2023-04-01 12:36:02,866 INFO L78 Accepts]: Start accepts. Automaton has 37764 states and 56678 transitions. Word has length 182 [2023-04-01 12:36:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:02,867 INFO L495 AbstractCegarLoop]: Abstraction has 37764 states and 56678 transitions. [2023-04-01 12:36:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37764 states and 56678 transitions. [2023-04-01 12:36:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-01 12:36:02,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:02,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:36:02,904 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:02,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2045737564, now seen corresponding path program 1 times [2023-04-01 12:36:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139624082] [2023-04-01 12:36:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:03,081 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 12:36:03,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139624082] [2023-04-01 12:36:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139624082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:36:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563720392] [2023-04-01 12:36:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:36:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:36:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:36:03,083 INFO L87 Difference]: Start difference. First operand 37764 states and 56678 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:06,346 INFO L93 Difference]: Finished difference Result 75279 states and 112996 transitions. [2023-04-01 12:36:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:36:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2023-04-01 12:36:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:06,418 INFO L225 Difference]: With dead ends: 75279 [2023-04-01 12:36:06,418 INFO L226 Difference]: Without dead ends: 37768 [2023-04-01 12:36:06,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:06,471 INFO L413 NwaCegarLoop]: 1826 mSDtfsCounter, 1778 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 3679 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:06,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1778 Valid, 3679 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:36:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37768 states. [2023-04-01 12:36:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37768 to 37729. [2023-04-01 12:36:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37729 states, 37724 states have (on average 1.4966864595482983) internal successors, (56461), 37725 states have internal predecessors, (56461), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37729 states to 37729 states and 56464 transitions. [2023-04-01 12:36:09,224 INFO L78 Accepts]: Start accepts. Automaton has 37729 states and 56464 transitions. Word has length 183 [2023-04-01 12:36:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:09,225 INFO L495 AbstractCegarLoop]: Abstraction has 37729 states and 56464 transitions. [2023-04-01 12:36:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37729 states and 56464 transitions. [2023-04-01 12:36:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 12:36:09,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:09,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:36:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:36:09,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:09,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash 748502547, now seen corresponding path program 1 times [2023-04-01 12:36:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:09,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919886066] [2023-04-01 12:36:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:10,165 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 12:36:10,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919886066] [2023-04-01 12:36:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919886066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:10,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:10,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:36:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268060897] [2023-04-01 12:36:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:36:10,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:36:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:36:10,167 INFO L87 Difference]: Start difference. First operand 37729 states and 56464 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:14,356 INFO L93 Difference]: Finished difference Result 71425 states and 106774 transitions. [2023-04-01 12:36:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:36:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2023-04-01 12:36:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:14,453 INFO L225 Difference]: With dead ends: 71425 [2023-04-01 12:36:14,453 INFO L226 Difference]: Without dead ends: 51969 [2023-04-01 12:36:14,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:14,486 INFO L413 NwaCegarLoop]: 2212 mSDtfsCounter, 1566 mSDsluCounter, 2798 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 5010 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:14,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1566 Valid, 5010 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:36:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51969 states. [2023-04-01 12:36:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51969 to 51961. [2023-04-01 12:36:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51961 states, 51956 states have (on average 1.4921664485333743) internal successors, (77527), 51957 states have internal predecessors, (77527), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51961 states to 51961 states and 77530 transitions. [2023-04-01 12:36:18,914 INFO L78 Accepts]: Start accepts. Automaton has 51961 states and 77530 transitions. Word has length 192 [2023-04-01 12:36:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:18,915 INFO L495 AbstractCegarLoop]: Abstraction has 51961 states and 77530 transitions. [2023-04-01 12:36:18,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 51961 states and 77530 transitions. [2023-04-01 12:36:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-04-01 12:36:18,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:18,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:36:18,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:36:18,940 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:18,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1238763747, now seen corresponding path program 1 times [2023-04-01 12:36:18,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:18,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709648575] [2023-04-01 12:36:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:18,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:19,557 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 12:36:19,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709648575] [2023-04-01 12:36:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709648575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:19,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:19,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:36:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648607250] [2023-04-01 12:36:19,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:19,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:36:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:36:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:36:19,560 INFO L87 Difference]: Start difference. First operand 51961 states and 77530 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:26,102 INFO L93 Difference]: Finished difference Result 105211 states and 157004 transitions. [2023-04-01 12:36:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:36:26,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2023-04-01 12:36:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:26,243 INFO L225 Difference]: With dead ends: 105211 [2023-04-01 12:36:26,243 INFO L226 Difference]: Without dead ends: 75789 [2023-04-01 12:36:26,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:36:26,284 INFO L413 NwaCegarLoop]: 2317 mSDtfsCounter, 1764 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:26,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1764 Valid, 3692 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:36:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75789 states. [2023-04-01 12:36:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75789 to 75781. [2023-04-01 12:36:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75781 states, 75776 states have (on average 1.48876953125) internal successors, (112813), 75777 states have internal predecessors, (112813), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75781 states to 75781 states and 112816 transitions. [2023-04-01 12:36:33,078 INFO L78 Accepts]: Start accepts. Automaton has 75781 states and 112816 transitions. Word has length 195 [2023-04-01 12:36:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 75781 states and 112816 transitions. [2023-04-01 12:36:33,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 75781 states and 112816 transitions. [2023-04-01 12:36:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-01 12:36:33,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:33,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:36:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:36:33,107 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:33,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1467212179, now seen corresponding path program 1 times [2023-04-01 12:36:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729331335] [2023-04-01 12:36:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat