/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:21:52,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:21:52,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:21:52,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:21:52,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:21:52,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:21:52,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:21:52,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:21:52,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:21:52,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:21:52,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:21:52,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:21:52,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:21:52,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:21:52,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:21:52,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:21:52,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:21:52,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:21:52,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:21:52,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:21:52,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:21:52,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:21:52,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:21:52,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:21:52,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:21:52,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:21:52,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:21:52,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:21:52,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:21:52,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:21:52,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:21:52,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:21:52,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:21:52,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:21:52,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:21:52,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:21:52,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:21:52,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:21:52,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:21:52,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:21:52,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:21:52,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:21:52,276 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:21:52,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:21:52,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:21:52,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:21:52,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:21:52,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:21:52,277 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:21:52,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:21:52,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:21:52,278 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:21:52,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:21:52,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:21:52,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:21:52,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:21:52,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:21:52,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:21:52,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:21:52,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:21:52,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:21:52,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:21:52,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:21:52,486 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:21:52,487 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:21:52,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:21:53,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:21:53,557 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:21:53,557 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:21:53,563 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e935a3ad/6e8c111e29b447c8b9afa5d572fcc691/FLAG3b0adaa21 [2023-04-03 03:21:53,574 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e935a3ad/6e8c111e29b447c8b9afa5d572fcc691 [2023-04-03 03:21:53,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:21:53,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:21:53,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:21:53,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:21:53,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:21:53,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4bc5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53, skipping insertion in model container [2023-04-03 03:21:53,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:21:53,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:21:53,766 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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-03 03:21:53,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:21:53,816 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:21:53,861 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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-03 03:21:53,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:21:53,912 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:21:53,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53 WrapperNode [2023-04-03 03:21:53,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:21:53,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:21:53,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:21:53,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:21:53,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:21:53,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:21:53,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:21:53,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:21:53,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (1/1) ... [2023-04-03 03:21:53,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:21:54,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:21:54,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:21:54,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:21:54,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:21:54,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:21:54,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:21:54,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:21:54,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:21:54,076 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:21:54,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:21:54,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:21:54,175 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:21:54,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:21:54,647 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:21:54,809 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:21:54,809 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:21:54,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:21:54 BoogieIcfgContainer [2023-04-03 03:21:54,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:21:54,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:21:54,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:21:54,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:21:54,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:21:53" (1/3) ... [2023-04-03 03:21:54,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5765a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:21:54, skipping insertion in model container [2023-04-03 03:21:54,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:21:53" (2/3) ... [2023-04-03 03:21:54,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5765a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:21:54, skipping insertion in model container [2023-04-03 03:21:54,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:21:54" (3/3) ... [2023-04-03 03:21:54,820 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:21:54,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:21:54,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:21:54,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:21:54,878 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;@3b18693f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:21:54,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:21:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 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) [2023-04-03 03:21:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 03:21:54,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:54,888 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] [2023-04-03 03:21:54,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:54,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1843659318, now seen corresponding path program 1 times [2023-04-03 03:21:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:54,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963727269] [2023-04-03 03:21:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:55,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963727269] [2023-04-03 03:21:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963727269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:55,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:55,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654893708] [2023-04-03 03:21:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:55,314 INFO L87 Difference]: Start difference. First operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 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 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-04-03 03:21:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:55,421 INFO L93 Difference]: Finished difference Result 244 states and 371 transitions. [2023-04-03 03:21:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 47 [2023-04-03 03:21:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:55,432 INFO L225 Difference]: With dead ends: 244 [2023-04-03 03:21:55,432 INFO L226 Difference]: Without dead ends: 150 [2023-04-03 03:21:55,437 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 [2023-04-03 03:21:55,441 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 113 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:55,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 376 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-03 03:21:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2023-04-03 03:21:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.4305555555555556) internal successors, (206), 144 states have internal predecessors, (206), 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) [2023-04-03 03:21:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2023-04-03 03:21:55,511 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 47 [2023-04-03 03:21:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:55,512 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2023-04-03 03:21:55,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-04-03 03:21:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2023-04-03 03:21:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 03:21:55,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:55,514 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] [2023-04-03 03:21:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:21:55,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:55,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 448384753, now seen corresponding path program 1 times [2023-04-03 03:21:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327226669] [2023-04-03 03:21:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:55,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:55,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327226669] [2023-04-03 03:21:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327226669] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:55,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:55,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:55,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283935641] [2023-04-03 03:21:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:55,676 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-03 03:21:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:55,762 INFO L93 Difference]: Finished difference Result 325 states and 482 transitions. [2023-04-03 03:21:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 49 [2023-04-03 03:21:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:55,768 INFO L225 Difference]: With dead ends: 325 [2023-04-03 03:21:55,771 INFO L226 Difference]: Without dead ends: 213 [2023-04-03 03:21:55,775 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 [2023-04-03 03:21:55,776 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 93 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:55,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-03 03:21:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2023-04-03 03:21:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.4541062801932367) internal successors, (301), 207 states have internal predecessors, (301), 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) [2023-04-03 03:21:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 304 transitions. [2023-04-03 03:21:55,801 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 304 transitions. Word has length 49 [2023-04-03 03:21:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:55,801 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 304 transitions. [2023-04-03 03:21:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-03 03:21:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 304 transitions. [2023-04-03 03:21:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 03:21:55,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:55,807 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] [2023-04-03 03:21:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:21:55,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:55,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1705082450, now seen corresponding path program 1 times [2023-04-03 03:21:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927935335] [2023-04-03 03:21:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:55,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927935335] [2023-04-03 03:21:55,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927935335] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:55,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412211483] [2023-04-03 03:21:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:55,903 INFO L87 Difference]: Start difference. First operand 211 states and 304 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-04-03 03:21:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:55,946 INFO L93 Difference]: Finished difference Result 515 states and 767 transitions. [2023-04-03 03:21:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 51 [2023-04-03 03:21:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:55,948 INFO L225 Difference]: With dead ends: 515 [2023-04-03 03:21:55,948 INFO L226 Difference]: Without dead ends: 342 [2023-04-03 03:21:55,952 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 [2023-04-03 03:21:55,955 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 92 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:55,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 269 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-04-03 03:21:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2023-04-03 03:21:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 336 states have (on average 1.4702380952380953) internal successors, (494), 336 states have internal predecessors, (494), 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) [2023-04-03 03:21:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 497 transitions. [2023-04-03 03:21:55,985 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 497 transitions. Word has length 51 [2023-04-03 03:21:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:55,986 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 497 transitions. [2023-04-03 03:21:55,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-04-03 03:21:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 497 transitions. [2023-04-03 03:21:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 03:21:55,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:55,987 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] [2023-04-03 03:21:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:21:55,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:55,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash 973578143, now seen corresponding path program 1 times [2023-04-03 03:21:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648162221] [2023-04-03 03:21:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:56,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648162221] [2023-04-03 03:21:56,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648162221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:56,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:56,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156724466] [2023-04-03 03:21:56,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:56,078 INFO L87 Difference]: Start difference. First operand 340 states and 497 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-04-03 03:21:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:56,146 INFO L93 Difference]: Finished difference Result 831 states and 1246 transitions. [2023-04-03 03:21:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-03 03:21:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:56,148 INFO L225 Difference]: With dead ends: 831 [2023-04-03 03:21:56,148 INFO L226 Difference]: Without dead ends: 529 [2023-04-03 03:21:56,149 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 [2023-04-03 03:21:56,153 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:56,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 236 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-04-03 03:21:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2023-04-03 03:21:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 523 states have (on average 1.491395793499044) internal successors, (780), 523 states have internal predecessors, (780), 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) [2023-04-03 03:21:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 783 transitions. [2023-04-03 03:21:56,189 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 783 transitions. Word has length 53 [2023-04-03 03:21:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:56,190 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 783 transitions. [2023-04-03 03:21:56,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-04-03 03:21:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 783 transitions. [2023-04-03 03:21:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 03:21:56,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:56,191 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] [2023-04-03 03:21:56,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:21:56,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:56,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1580093760, now seen corresponding path program 1 times [2023-04-03 03:21:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289955013] [2023-04-03 03:21:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:56,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:56,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289955013] [2023-04-03 03:21:56,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289955013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:56,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:56,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:56,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560498366] [2023-04-03 03:21:56,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:56,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:56,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:56,261 INFO L87 Difference]: Start difference. First operand 527 states and 783 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-04-03 03:21:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:56,344 INFO L93 Difference]: Finished difference Result 1347 states and 2018 transitions. [2023-04-03 03:21:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-03 03:21:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:56,348 INFO L225 Difference]: With dead ends: 1347 [2023-04-03 03:21:56,348 INFO L226 Difference]: Without dead ends: 874 [2023-04-03 03:21:56,349 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 [2023-04-03 03:21:56,349 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 86 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:56,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-04-03 03:21:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2023-04-03 03:21:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 868 states have (on average 1.4792626728110598) internal successors, (1284), 868 states have internal predecessors, (1284), 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) [2023-04-03 03:21:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1287 transitions. [2023-04-03 03:21:56,426 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1287 transitions. Word has length 55 [2023-04-03 03:21:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:56,426 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1287 transitions. [2023-04-03 03:21:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-04-03 03:21:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1287 transitions. [2023-04-03 03:21:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 03:21:56,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:56,428 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] [2023-04-03 03:21:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:21:56,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:56,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 888083464, now seen corresponding path program 1 times [2023-04-03 03:21:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362534465] [2023-04-03 03:21:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:56,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362534465] [2023-04-03 03:21:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362534465] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:56,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:56,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:21:56,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474238393] [2023-04-03 03:21:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:56,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:21:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:21:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:21:56,524 INFO L87 Difference]: Start difference. First operand 872 states and 1287 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-04-03 03:21:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:56,661 INFO L93 Difference]: Finished difference Result 2179 states and 3257 transitions. [2023-04-03 03:21:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:21:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-03 03:21:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:56,667 INFO L225 Difference]: With dead ends: 2179 [2023-04-03 03:21:56,667 INFO L226 Difference]: Without dead ends: 1361 [2023-04-03 03:21:56,668 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 [2023-04-03 03:21:56,669 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 85 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:56,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 238 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2023-04-03 03:21:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1359. [2023-04-03 03:21:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1355 states have (on average 1.4900369003690037) internal successors, (2019), 1355 states have internal predecessors, (2019), 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) [2023-04-03 03:21:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2022 transitions. [2023-04-03 03:21:56,781 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2022 transitions. Word has length 57 [2023-04-03 03:21:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:56,781 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 2022 transitions. [2023-04-03 03:21:56,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-04-03 03:21:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2022 transitions. [2023-04-03 03:21:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 03:21:56,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:56,782 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] [2023-04-03 03:21:56,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:21:56,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:56,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2038268759, now seen corresponding path program 1 times [2023-04-03 03:21:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:56,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127603018] [2023-04-03 03:21:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:56,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:56,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127603018] [2023-04-03 03:21:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127603018] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:56,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:56,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:21:56,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357538919] [2023-04-03 03:21:56,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:56,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:21:56,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:21:56,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:21:56,911 INFO L87 Difference]: Start difference. First operand 1359 states and 2022 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2023-04-03 03:21:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:57,215 INFO L93 Difference]: Finished difference Result 3447 states and 5166 transitions. [2023-04-03 03:21:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 03:21:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 59 [2023-04-03 03:21:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:57,222 INFO L225 Difference]: With dead ends: 3447 [2023-04-03 03:21:57,222 INFO L226 Difference]: Without dead ends: 2140 [2023-04-03 03:21:57,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:21:57,225 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 525 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:57,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 960 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:21:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2023-04-03 03:21:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2114. [2023-04-03 03:21:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2110 states have (on average 1.4985781990521327) internal successors, (3162), 2110 states have internal predecessors, (3162), 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) [2023-04-03 03:21:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3165 transitions. [2023-04-03 03:21:57,393 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3165 transitions. Word has length 59 [2023-04-03 03:21:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:57,394 INFO L495 AbstractCegarLoop]: Abstraction has 2114 states and 3165 transitions. [2023-04-03 03:21:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2023-04-03 03:21:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3165 transitions. [2023-04-03 03:21:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 03:21:57,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:57,395 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] [2023-04-03 03:21:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:21:57,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1176567476, now seen corresponding path program 1 times [2023-04-03 03:21:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196942152] [2023-04-03 03:21:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:57,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196942152] [2023-04-03 03:21:57,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196942152] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:57,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:57,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:21:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761736450] [2023-04-03 03:21:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:21:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:21:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:21:57,479 INFO L87 Difference]: Start difference. First operand 2114 states and 3165 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-04-03 03:21:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:57,680 INFO L93 Difference]: Finished difference Result 4160 states and 6245 transitions. [2023-04-03 03:21:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:21:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 60 [2023-04-03 03:21:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:57,687 INFO L225 Difference]: With dead ends: 4160 [2023-04-03 03:21:57,687 INFO L226 Difference]: Without dead ends: 2116 [2023-04-03 03:21:57,690 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 [2023-04-03 03:21:57,690 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 174 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:57,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 347 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2023-04-03 03:21:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2111. [2023-04-03 03:21:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2107 states have (on average 1.4935927859515898) internal successors, (3147), 2107 states have internal predecessors, (3147), 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) [2023-04-03 03:21:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3150 transitions. [2023-04-03 03:21:57,840 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3150 transitions. Word has length 60 [2023-04-03 03:21:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:57,840 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3150 transitions. [2023-04-03 03:21:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-04-03 03:21:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3150 transitions. [2023-04-03 03:21:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 03:21:57,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:57,841 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] [2023-04-03 03:21:57,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:21:57,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:57,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash 286675144, now seen corresponding path program 1 times [2023-04-03 03:21:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:57,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412300711] [2023-04-03 03:21:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:21:58,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412300711] [2023-04-03 03:21:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412300711] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:21:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:21:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4304578] [2023-04-03 03:21:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:21:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:21:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:21:58,058 INFO L87 Difference]: Start difference. First operand 2111 states and 3150 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-04-03 03:21:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:21:58,334 INFO L93 Difference]: Finished difference Result 3444 states and 5086 transitions. [2023-04-03 03:21:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:21:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 68 [2023-04-03 03:21:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:21:58,344 INFO L225 Difference]: With dead ends: 3444 [2023-04-03 03:21:58,344 INFO L226 Difference]: Without dead ends: 3442 [2023-04-03 03:21:58,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:21:58,347 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 176 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:21:58,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 686 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:21:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2023-04-03 03:21:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 2155. [2023-04-03 03:21:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2151 states have (on average 1.4728033472803348) internal successors, (3168), 2151 states have internal predecessors, (3168), 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) [2023-04-03 03:21:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3171 transitions. [2023-04-03 03:21:58,574 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3171 transitions. Word has length 68 [2023-04-03 03:21:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:21:58,574 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 3171 transitions. [2023-04-03 03:21:58,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-04-03 03:21:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3171 transitions. [2023-04-03 03:21:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 03:21:58,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:21:58,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:21:58,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:21:58,578 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:21:58,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:21:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -451444386, now seen corresponding path program 1 times [2023-04-03 03:21:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:21:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888530343] [2023-04-03 03:21:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:21:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:21:59,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:21:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888530343] [2023-04-03 03:21:59,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888530343] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:21:59,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509159527] [2023-04-03 03:21:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:21:59,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:21:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:21:59,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:21:59,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 03:21:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:21:59,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:21:59,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:21:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:21:59,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:21:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509159527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:21:59,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:21:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:21:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841944741] [2023-04-03 03:21:59,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:21:59,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:21:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:21:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:21:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:21:59,785 INFO L87 Difference]: Start difference. First operand 2155 states and 3171 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2023-04-03 03:22:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:00,406 INFO L93 Difference]: Finished difference Result 6187 states and 9117 transitions. [2023-04-03 03:22:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 78 [2023-04-03 03:22:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:00,417 INFO L225 Difference]: With dead ends: 6187 [2023-04-03 03:22:00,418 INFO L226 Difference]: Without dead ends: 4099 [2023-04-03 03:22:00,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:22:00,421 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 296 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:00,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 346 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2023-04-03 03:22:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 4097. [2023-04-03 03:22:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4093 states have (on average 1.464695822135353) internal successors, (5995), 4093 states have internal predecessors, (5995), 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) [2023-04-03 03:22:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 5998 transitions. [2023-04-03 03:22:00,930 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 5998 transitions. Word has length 78 [2023-04-03 03:22:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:00,930 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 5998 transitions. [2023-04-03 03:22:00,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2023-04-03 03:22:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 5998 transitions. [2023-04-03 03:22:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 03:22:00,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:00,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:00,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 03:22:01,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 03:22:01,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:01,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:01,138 INFO L85 PathProgramCache]: Analyzing trace with hash 470585833, now seen corresponding path program 1 times [2023-04-03 03:22:01,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:01,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755693757] [2023-04-03 03:22:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:01,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:22:01,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:01,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755693757] [2023-04-03 03:22:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755693757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:01,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:22:01,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:22:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215889024] [2023-04-03 03:22:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:22:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:22:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:22:01,208 INFO L87 Difference]: Start difference. First operand 4097 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-04-03 03:22:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:01,796 INFO L93 Difference]: Finished difference Result 9501 states and 13966 transitions. [2023-04-03 03:22:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:22:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 79 [2023-04-03 03:22:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:01,810 INFO L225 Difference]: With dead ends: 9501 [2023-04-03 03:22:01,810 INFO L226 Difference]: Without dead ends: 5466 [2023-04-03 03:22:01,814 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 [2023-04-03 03:22:01,815 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:01,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 250 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2023-04-03 03:22:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 5464. [2023-04-03 03:22:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5460 states have (on average 1.4558608058608058) internal successors, (7949), 5460 states have internal predecessors, (7949), 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) [2023-04-03 03:22:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 7952 transitions. [2023-04-03 03:22:02,439 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 7952 transitions. Word has length 79 [2023-04-03 03:22:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:02,439 INFO L495 AbstractCegarLoop]: Abstraction has 5464 states and 7952 transitions. [2023-04-03 03:22:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-04-03 03:22:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 7952 transitions. [2023-04-03 03:22:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 03:22:02,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:02,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:02,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:22:02,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:02,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:02,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1778228531, now seen corresponding path program 1 times [2023-04-03 03:22:02,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:02,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945523301] [2023-04-03 03:22:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:02,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:22:02,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945523301] [2023-04-03 03:22:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945523301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:22:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357784658] [2023-04-03 03:22:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:02,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:22:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:22:02,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:22:02,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 03:22:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:03,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:22:03,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:22:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:22:03,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:22:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357784658] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:22:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:22:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092289449] [2023-04-03 03:22:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:22:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:22:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:22:03,418 INFO L87 Difference]: Start difference. First operand 5464 states and 7952 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2023-04-03 03:22:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:04,803 INFO L93 Difference]: Finished difference Result 15821 states and 22988 transitions. [2023-04-03 03:22:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 82 [2023-04-03 03:22:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:04,833 INFO L225 Difference]: With dead ends: 15821 [2023-04-03 03:22:04,834 INFO L226 Difference]: Without dead ends: 10408 [2023-04-03 03:22:04,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:22:04,843 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 314 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:04,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 331 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10408 states. [2023-04-03 03:22:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10408 to 10406. [2023-04-03 03:22:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10402 states have (on average 1.4416458373389733) internal successors, (14996), 10402 states have internal predecessors, (14996), 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) [2023-04-03 03:22:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 14999 transitions. [2023-04-03 03:22:06,029 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 14999 transitions. Word has length 82 [2023-04-03 03:22:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:06,029 INFO L495 AbstractCegarLoop]: Abstraction has 10406 states and 14999 transitions. [2023-04-03 03:22:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2023-04-03 03:22:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 14999 transitions. [2023-04-03 03:22:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 03:22:06,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:06,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:06,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 03:22:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 03:22:06,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:06,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash -648476326, now seen corresponding path program 1 times [2023-04-03 03:22:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:06,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969731642] [2023-04-03 03:22:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:22:06,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969731642] [2023-04-03 03:22:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969731642] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:06,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:22:06,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:22:06,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147150215] [2023-04-03 03:22:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:22:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:22:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:22:06,296 INFO L87 Difference]: Start difference. First operand 10406 states and 14999 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-04-03 03:22:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:08,200 INFO L93 Difference]: Finished difference Result 24564 states and 35573 transitions. [2023-04-03 03:22:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:22:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 83 [2023-04-03 03:22:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:08,234 INFO L225 Difference]: With dead ends: 24564 [2023-04-03 03:22:08,235 INFO L226 Difference]: Without dead ends: 14204 [2023-04-03 03:22:08,247 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 [2023-04-03 03:22:08,248 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 92 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:08,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 251 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14204 states. [2023-04-03 03:22:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14204 to 14202. [2023-04-03 03:22:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14202 states, 14198 states have (on average 1.4323144104803494) internal successors, (20336), 14198 states have internal predecessors, (20336), 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) [2023-04-03 03:22:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14202 states to 14202 states and 20339 transitions. [2023-04-03 03:22:10,071 INFO L78 Accepts]: Start accepts. Automaton has 14202 states and 20339 transitions. Word has length 83 [2023-04-03 03:22:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:10,071 INFO L495 AbstractCegarLoop]: Abstraction has 14202 states and 20339 transitions. [2023-04-03 03:22:10,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-04-03 03:22:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14202 states and 20339 transitions. [2023-04-03 03:22:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 03:22:10,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:10,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:22:10,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:10,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1401709011, now seen corresponding path program 1 times [2023-04-03 03:22:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969540790] [2023-04-03 03:22:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:22:10,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:10,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969540790] [2023-04-03 03:22:10,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969540790] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:10,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:22:10,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:22:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19484078] [2023-04-03 03:22:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:22:10,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:22:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:22:10,166 INFO L87 Difference]: Start difference. First operand 14202 states and 20339 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-04-03 03:22:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:12,084 INFO L93 Difference]: Finished difference Result 28360 states and 40631 transitions. [2023-04-03 03:22:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 03:22:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:12,115 INFO L225 Difference]: With dead ends: 28360 [2023-04-03 03:22:12,115 INFO L226 Difference]: Without dead ends: 14202 [2023-04-03 03:22:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:22:12,134 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 329 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14202 states. [2023-04-03 03:22:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14202 to 14202. [2023-04-03 03:22:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14202 states, 14198 states have (on average 1.4123115931821384) internal successors, (20052), 14198 states have internal predecessors, (20052), 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) [2023-04-03 03:22:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14202 states to 14202 states and 20055 transitions. [2023-04-03 03:22:14,070 INFO L78 Accepts]: Start accepts. Automaton has 14202 states and 20055 transitions. Word has length 86 [2023-04-03 03:22:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:14,070 INFO L495 AbstractCegarLoop]: Abstraction has 14202 states and 20055 transitions. [2023-04-03 03:22:14,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-04-03 03:22:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14202 states and 20055 transitions. [2023-04-03 03:22:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 03:22:14,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:14,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:22:14,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:14,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1742919224, now seen corresponding path program 1 times [2023-04-03 03:22:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:14,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966359749] [2023-04-03 03:22:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:22:14,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966359749] [2023-04-03 03:22:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966359749] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:22:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406469380] [2023-04-03 03:22:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:22:14,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:22:14,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:22:14,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 03:22:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:14,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:22:14,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:22:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:22:15,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:22:15,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406469380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:15,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:22:15,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:22:15,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498979268] [2023-04-03 03:22:15,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:22:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:22:15,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:22:15,180 INFO L87 Difference]: Start difference. First operand 14202 states and 20055 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-04-03 03:22:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:19,307 INFO L93 Difference]: Finished difference Result 41430 states and 58369 transitions. [2023-04-03 03:22:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 86 [2023-04-03 03:22:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:19,353 INFO L225 Difference]: With dead ends: 41430 [2023-04-03 03:22:19,353 INFO L226 Difference]: Without dead ends: 27326 [2023-04-03 03:22:19,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:22:19,373 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 275 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:19,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 339 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27326 states. [2023-04-03 03:22:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27326 to 27324. [2023-04-03 03:22:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27324 states, 27320 states have (on average 1.3992679355783308) internal successors, (38228), 27320 states have internal predecessors, (38228), 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) [2023-04-03 03:22:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27324 states to 27324 states and 38231 transitions. [2023-04-03 03:22:23,874 INFO L78 Accepts]: Start accepts. Automaton has 27324 states and 38231 transitions. Word has length 86 [2023-04-03 03:22:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:23,874 INFO L495 AbstractCegarLoop]: Abstraction has 27324 states and 38231 transitions. [2023-04-03 03:22:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-04-03 03:22:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27324 states and 38231 transitions. [2023-04-03 03:22:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 03:22:23,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:23,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:23,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 03:22:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:22:24,083 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:24,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1237276395, now seen corresponding path program 1 times [2023-04-03 03:22:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198296677] [2023-04-03 03:22:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:22:24,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198296677] [2023-04-03 03:22:24,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198296677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:24,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:22:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:22:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50901939] [2023-04-03 03:22:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:22:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:22:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:22:24,172 INFO L87 Difference]: Start difference. First operand 27324 states and 38231 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-04-03 03:22:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:30,011 INFO L93 Difference]: Finished difference Result 63456 states and 88981 transitions. [2023-04-03 03:22:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:22:30,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 87 [2023-04-03 03:22:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:30,077 INFO L225 Difference]: With dead ends: 63456 [2023-04-03 03:22:30,078 INFO L226 Difference]: Without dead ends: 36230 [2023-04-03 03:22:30,109 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 [2023-04-03 03:22:30,109 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 70 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:30,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 251 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36230 states. [2023-04-03 03:22:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36230 to 36228. [2023-04-03 03:22:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36228 states, 36224 states have (on average 1.387809187279152) internal successors, (50272), 36224 states have internal predecessors, (50272), 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) [2023-04-03 03:22:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36228 states to 36228 states and 50275 transitions. [2023-04-03 03:22:36,333 INFO L78 Accepts]: Start accepts. Automaton has 36228 states and 50275 transitions. Word has length 87 [2023-04-03 03:22:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:36,333 INFO L495 AbstractCegarLoop]: Abstraction has 36228 states and 50275 transitions. [2023-04-03 03:22:36,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-04-03 03:22:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 36228 states and 50275 transitions. [2023-04-03 03:22:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:22:36,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:36,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 03:22:36,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:36,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1036289982, now seen corresponding path program 1 times [2023-04-03 03:22:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:36,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5770058] [2023-04-03 03:22:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:36,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:22:36,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:36,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5770058] [2023-04-03 03:22:36,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5770058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:36,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:22:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:22:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045354064] [2023-04-03 03:22:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:22:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:22:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:22:36,436 INFO L87 Difference]: Start difference. First operand 36228 states and 50275 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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) [2023-04-03 03:22:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:42,959 INFO L93 Difference]: Finished difference Result 72358 states and 100436 transitions. [2023-04-03 03:22:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-03 03:22:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:43,012 INFO L225 Difference]: With dead ends: 72358 [2023-04-03 03:22:43,012 INFO L226 Difference]: Without dead ends: 36228 [2023-04-03 03:22:43,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:22:43,044 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 299 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 126 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36228 states. [2023-04-03 03:22:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36228 to 36228. [2023-04-03 03:22:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36228 states, 36224 states have (on average 1.3715768551236749) internal successors, (49684), 36224 states have internal predecessors, (49684), 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) [2023-04-03 03:22:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36228 states to 36228 states and 49687 transitions. [2023-04-03 03:22:49,535 INFO L78 Accepts]: Start accepts. Automaton has 36228 states and 49687 transitions. Word has length 90 [2023-04-03 03:22:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:22:49,535 INFO L495 AbstractCegarLoop]: Abstraction has 36228 states and 49687 transitions. [2023-04-03 03:22:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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) [2023-04-03 03:22:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36228 states and 49687 transitions. [2023-04-03 03:22:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:22:49,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:22:49,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:22:49,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 03:22:49,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:22:49,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:22:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1787979299, now seen corresponding path program 1 times [2023-04-03 03:22:49,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:22:49,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44173544] [2023-04-03 03:22:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:22:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:22:50,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:22:50,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44173544] [2023-04-03 03:22:50,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44173544] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:22:50,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392291810] [2023-04-03 03:22:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:22:50,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:22:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:22:50,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:22:50,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 03:22:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:22:50,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 03:22:50,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:22:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:22:50,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:22:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392291810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:22:50,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:22:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:22:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245899767] [2023-04-03 03:22:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:22:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:22:50,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:22:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:22:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:22:50,702 INFO L87 Difference]: Start difference. First operand 36228 states and 49687 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2023-04-03 03:22:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:22:55,353 INFO L93 Difference]: Finished difference Result 63978 states and 87573 transitions. [2023-04-03 03:22:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:22:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 90 [2023-04-03 03:22:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:22:55,392 INFO L225 Difference]: With dead ends: 63978 [2023-04-03 03:22:55,392 INFO L226 Difference]: Without dead ends: 27845 [2023-04-03 03:22:55,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:22:55,429 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 409 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:22:55,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 254 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:22:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27845 states. [2023-04-03 03:23:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27845 to 27842. [2023-04-03 03:23:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27842 states, 27838 states have (on average 1.3647172929089733) internal successors, (37991), 27838 states have internal predecessors, (37991), 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) [2023-04-03 03:23:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27842 states to 27842 states and 37994 transitions. [2023-04-03 03:23:00,336 INFO L78 Accepts]: Start accepts. Automaton has 27842 states and 37994 transitions. Word has length 90 [2023-04-03 03:23:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:23:00,336 INFO L495 AbstractCegarLoop]: Abstraction has 27842 states and 37994 transitions. [2023-04-03 03:23:00,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2023-04-03 03:23:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states and 37994 transitions. [2023-04-03 03:23:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:23:00,337 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:23:00,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:23:00,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-03 03:23:00,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-03 03:23:00,543 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:23:00,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:23:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash 533171253, now seen corresponding path program 1 times [2023-04-03 03:23:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:23:00,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973506016] [2023-04-03 03:23:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:23:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:23:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:23:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:23:00,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:23:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973506016] [2023-04-03 03:23:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973506016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:23:00,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:23:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:23:00,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052448275] [2023-04-03 03:23:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:23:00,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:23:00,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:23:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:23:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:23:00,630 INFO L87 Difference]: Start difference. First operand 27842 states and 37994 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-04-03 03:23:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:23:05,399 INFO L93 Difference]: Finished difference Result 55615 states and 75909 transitions. [2023-04-03 03:23:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:23:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-03 03:23:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:23:05,438 INFO L225 Difference]: With dead ends: 55615 [2023-04-03 03:23:05,438 INFO L226 Difference]: Without dead ends: 27842 [2023-04-03 03:23:05,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:23:05,459 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 304 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:23:05,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:23:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27842 states. [2023-04-03 03:23:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27842 to 27842. [2023-04-03 03:23:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27842 states, 27838 states have (on average 1.3448164379624974) internal successors, (37437), 27838 states have internal predecessors, (37437), 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) [2023-04-03 03:23:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27842 states to 27842 states and 37440 transitions. [2023-04-03 03:23:10,712 INFO L78 Accepts]: Start accepts. Automaton has 27842 states and 37440 transitions. Word has length 90 [2023-04-03 03:23:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:23:10,712 INFO L495 AbstractCegarLoop]: Abstraction has 27842 states and 37440 transitions. [2023-04-03 03:23:10,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-04-03 03:23:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states and 37440 transitions. [2023-04-03 03:23:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:23:10,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:23:10,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:23:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 03:23:10,714 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:23:10,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:23:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1856570342, now seen corresponding path program 1 times [2023-04-03 03:23:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:23:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101553821] [2023-04-03 03:23:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:23:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:23:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:23:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:23:11,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:23:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101553821] [2023-04-03 03:23:11,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101553821] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:23:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762830916] [2023-04-03 03:23:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:23:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:23:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:23:11,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:23:11,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 03:23:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:23:11,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-03 03:23:11,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:23:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:23:12,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 03:23:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:23:15,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762830916] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 03:23:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2147417055] [2023-04-03 03:23:15,047 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-03 03:23:15,047 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 03:23:15,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 03:23:15,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 03:23:15,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 03:23:15,848 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 202 for LOIs [2023-04-03 03:23:16,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12