/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:38:03,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:38:03,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:38:04,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:38:04,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:38:04,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:38:04,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:38:04,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:38:04,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:38:04,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:38:04,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:38:04,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:38:04,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:38:04,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:38:04,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:38:04,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:38:04,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:38:04,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:38:04,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:38:04,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:38:04,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:38:04,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:38:04,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:38:04,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:38:04,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:38:04,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:38:04,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:38:04,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:38:04,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:38:04,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:38:04,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:38:04,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:38:04,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:38:04,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:38:04,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:38:04,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:38:04,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:38:04,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:38:04,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:38:04,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:38:04,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:38:04,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:38:04,090 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:38:04,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:38:04,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:38:04,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:38:04,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:38:04,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:38:04,091 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:38:04,092 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:38:04,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:38:04,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:38:04,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:38:04,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:04,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:38:04,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:38:04,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:38:04,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:38:04,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:38:04,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:38:04,268 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:38:04,268 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:38:04,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2023-04-01 12:38:05,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:38:05,557 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:38:05,557 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2023-04-01 12:38:05,574 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeeee1a8c/121f32c1fd7d49b7ac33ae548a998e48/FLAG3a8a4bcfc [2023-04-01 12:38:05,584 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeeee1a8c/121f32c1fd7d49b7ac33ae548a998e48 [2023-04-01 12:38:05,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:38:05,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:38:05,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:05,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:38:05,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:38:05,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:05" (1/1) ... [2023-04-01 12:38:05,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1eb860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:05, skipping insertion in model container [2023-04-01 12:38:05,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:05" (1/1) ... [2023-04-01 12:38:05,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:38:05,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:38:05,897 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8424,8437] [2023-04-01 12:38:05,928 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12951,12964] [2023-04-01 12:38:05,963 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20701,20714] [2023-04-01 12:38:06,018 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27792,27805] [2023-04-01 12:38:06,080 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[49016,49029] [2023-04-01 12:38:06,150 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[80107,80120] [2023-04-01 12:38:06,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:06,278 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:38:06,306 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8424,8437] [2023-04-01 12:38:06,316 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12951,12964] [2023-04-01 12:38:06,339 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20701,20714] [2023-04-01 12:38:06,358 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27792,27805] [2023-04-01 12:38:06,398 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[49016,49029] [2023-04-01 12:38:06,435 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[80107,80120] [2023-04-01 12:38:06,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:06,520 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:38:06,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06 WrapperNode [2023-04-01 12:38:06,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:06,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:38:06,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:38:06,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:38:06,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:38:06,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:38:06,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:38:06,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:38:06,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (1/1) ... [2023-04-01 12:38:06,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:06,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:38:06,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:38:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:38:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:38:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:38:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:38:06,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:38:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:38:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:38:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:38:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:38:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:38:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:38:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:38:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:38:07,193 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:38:07,194 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:38:08,986 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:38:09,184 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:38:09,184 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:38:09,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:09 BoogieIcfgContainer [2023-04-01 12:38:09,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:38:09,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:38:09,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:38:09,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:38:09,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:38:05" (1/3) ... [2023-04-01 12:38:09,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a10ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:09, skipping insertion in model container [2023-04-01 12:38:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:06" (2/3) ... [2023-04-01 12:38:09,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a10ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:09, skipping insertion in model container [2023-04-01 12:38:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:09" (3/3) ... [2023-04-01 12:38:09,193 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2023-04-01 12:38:09,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:38:09,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-04-01 12:38:09,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:38:09,250 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;@6c52a8ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:38:09,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-04-01 12:38:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 1240 states, 1229 states have (on average 1.7705451586655818) internal successors, (2176), 1235 states have internal predecessors, (2176), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:38:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:38:09,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:09,272 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] [2023-04-01 12:38:09,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:09,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1369390932, now seen corresponding path program 1 times [2023-04-01 12:38:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:09,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346010840] [2023-04-01 12:38:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:09,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346010840] [2023-04-01 12:38:09,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346010840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:09,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:09,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613953022] [2023-04-01 12:38:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:09,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:09,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:09,835 INFO L87 Difference]: Start difference. First operand has 1240 states, 1229 states have (on average 1.7705451586655818) internal successors, (2176), 1235 states have internal predecessors, (2176), 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 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:11,091 INFO L93 Difference]: Finished difference Result 2377 states and 4076 transitions. [2023-04-01 12:38:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 55 [2023-04-01 12:38:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:11,110 INFO L225 Difference]: With dead ends: 2377 [2023-04-01 12:38:11,110 INFO L226 Difference]: Without dead ends: 1498 [2023-04-01 12:38:11,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:11,124 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 6661 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6661 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6661 Valid, 1470 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:38:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2023-04-01 12:38:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1492. [2023-04-01 12:38:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1483 states have (on average 1.2791638570465274) internal successors, (1897), 1488 states have internal predecessors, (1897), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1900 transitions. [2023-04-01 12:38:11,224 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 1900 transitions. Word has length 55 [2023-04-01 12:38:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:11,225 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 1900 transitions. [2023-04-01 12:38:11,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 1900 transitions. [2023-04-01 12:38:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:11,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:11,228 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] [2023-04-01 12:38:11,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:38:11,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:11,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1341711823, now seen corresponding path program 1 times [2023-04-01 12:38:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669256840] [2023-04-01 12:38:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:11,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:11,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669256840] [2023-04-01 12:38:11,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669256840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:11,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:11,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973470288] [2023-04-01 12:38:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:11,419 INFO L87 Difference]: Start difference. First operand 1492 states and 1900 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:12,068 INFO L93 Difference]: Finished difference Result 2855 states and 3662 transitions. [2023-04-01 12:38:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 56 [2023-04-01 12:38:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:12,075 INFO L225 Difference]: With dead ends: 2855 [2023-04-01 12:38:12,075 INFO L226 Difference]: Without dead ends: 1859 [2023-04-01 12:38:12,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:12,077 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 4102 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:12,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4102 Valid, 851 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:38:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-04-01 12:38:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1849. [2023-04-01 12:38:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1840 states have (on average 1.2788043478260869) internal successors, (2353), 1845 states have internal predecessors, (2353), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2356 transitions. [2023-04-01 12:38:12,194 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2356 transitions. Word has length 56 [2023-04-01 12:38:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:12,194 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2356 transitions. [2023-04-01 12:38:12,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2356 transitions. [2023-04-01 12:38:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:12,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:12,198 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] [2023-04-01 12:38:12,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:38:12,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:12,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1481651129, now seen corresponding path program 1 times [2023-04-01 12:38:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:12,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758543174] [2023-04-01 12:38:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:12,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:12,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758543174] [2023-04-01 12:38:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758543174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:12,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632599701] [2023-04-01 12:38:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:12,363 INFO L87 Difference]: Start difference. First operand 1849 states and 2356 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:12,949 INFO L93 Difference]: Finished difference Result 3975 states and 5059 transitions. [2023-04-01 12:38:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 56 [2023-04-01 12:38:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:12,957 INFO L225 Difference]: With dead ends: 3975 [2023-04-01 12:38:12,957 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 12:38:12,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:12,960 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 4022 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4022 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:12,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4022 Valid, 848 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 12:38:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2761. [2023-04-01 12:38:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2752 states have (on average 1.2750726744186047) internal successors, (3509), 2757 states have internal predecessors, (3509), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3512 transitions. [2023-04-01 12:38:13,131 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3512 transitions. Word has length 56 [2023-04-01 12:38:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:13,132 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3512 transitions. [2023-04-01 12:38:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3512 transitions. [2023-04-01 12:38:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:13,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:13,135 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] [2023-04-01 12:38:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:38:13,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:13,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1079127461, now seen corresponding path program 1 times [2023-04-01 12:38:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:13,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5272357] [2023-04-01 12:38:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:13,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:13,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5272357] [2023-04-01 12:38:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5272357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:13,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:13,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:38:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177513447] [2023-04-01 12:38:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:38:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:38:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:38:13,490 INFO L87 Difference]: Start difference. First operand 2761 states and 3512 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:14,467 INFO L93 Difference]: Finished difference Result 4384 states and 5700 transitions. [2023-04-01 12:38:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:38:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 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 58 [2023-04-01 12:38:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:14,478 INFO L225 Difference]: With dead ends: 4384 [2023-04-01 12:38:14,478 INFO L226 Difference]: Without dead ends: 3856 [2023-04-01 12:38:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:38:14,485 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 4446 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4446 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:14,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4446 Valid, 1927 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:38:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2023-04-01 12:38:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 2761. [2023-04-01 12:38:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2752 states have (on average 1.2747093023255813) internal successors, (3508), 2757 states have internal predecessors, (3508), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3511 transitions. [2023-04-01 12:38:14,624 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3511 transitions. Word has length 58 [2023-04-01 12:38:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:14,625 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3511 transitions. [2023-04-01 12:38:14,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3511 transitions. [2023-04-01 12:38:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:14,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:14,628 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] [2023-04-01 12:38:14,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:38:14,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:14,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 528269339, now seen corresponding path program 1 times [2023-04-01 12:38:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983975007] [2023-04-01 12:38:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:14,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:14,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:14,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983975007] [2023-04-01 12:38:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983975007] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:14,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:14,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527204464] [2023-04-01 12:38:14,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:14,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:14,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:14,975 INFO L87 Difference]: Start difference. First operand 2761 states and 3511 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:16,663 INFO L93 Difference]: Finished difference Result 3776 states and 4831 transitions. [2023-04-01 12:38:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 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 58 [2023-04-01 12:38:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:16,674 INFO L225 Difference]: With dead ends: 3776 [2023-04-01 12:38:16,674 INFO L226 Difference]: Without dead ends: 3770 [2023-04-01 12:38:16,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:38:16,676 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 5872 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5872 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:16,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5872 Valid, 2520 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 12:38:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2023-04-01 12:38:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2761. [2023-04-01 12:38:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2752 states have (on average 1.2743459302325582) internal successors, (3507), 2757 states have internal predecessors, (3507), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3510 transitions. [2023-04-01 12:38:16,872 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3510 transitions. Word has length 58 [2023-04-01 12:38:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:16,872 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3510 transitions. [2023-04-01 12:38:16,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3510 transitions. [2023-04-01 12:38:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:16,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:16,875 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] [2023-04-01 12:38:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:38:16,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:16,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -468730704, now seen corresponding path program 1 times [2023-04-01 12:38:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443632925] [2023-04-01 12:38:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:17,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:17,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443632925] [2023-04-01 12:38:17,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443632925] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:17,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:17,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:17,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669400592] [2023-04-01 12:38:17,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:17,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:17,145 INFO L87 Difference]: Start difference. First operand 2761 states and 3510 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:19,000 INFO L93 Difference]: Finished difference Result 4786 states and 6193 transitions. [2023-04-01 12:38:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 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 58 [2023-04-01 12:38:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:19,012 INFO L225 Difference]: With dead ends: 4786 [2023-04-01 12:38:19,012 INFO L226 Difference]: Without dead ends: 4380 [2023-04-01 12:38:19,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:38:19,015 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 6275 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 3015 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6275 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:19,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6275 Valid, 2858 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3015 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 12:38:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2023-04-01 12:38:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 2761. [2023-04-01 12:38:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2752 states have (on average 1.273982558139535) internal successors, (3506), 2757 states have internal predecessors, (3506), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3509 transitions. [2023-04-01 12:38:19,267 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3509 transitions. Word has length 58 [2023-04-01 12:38:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:19,267 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3509 transitions. [2023-04-01 12:38:19,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3509 transitions. [2023-04-01 12:38:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:19,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:19,270 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] [2023-04-01 12:38:19,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:38:19,270 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:19,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 45227606, now seen corresponding path program 1 times [2023-04-01 12:38:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:19,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584192422] [2023-04-01 12:38:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:19,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584192422] [2023-04-01 12:38:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584192422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:19,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:19,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71279725] [2023-04-01 12:38:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:19,359 INFO L87 Difference]: Start difference. First operand 2761 states and 3509 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:19,672 INFO L93 Difference]: Finished difference Result 3403 states and 4420 transitions. [2023-04-01 12:38:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 [2023-04-01 12:38:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:19,680 INFO L225 Difference]: With dead ends: 3403 [2023-04-01 12:38:19,680 INFO L226 Difference]: Without dead ends: 2689 [2023-04-01 12:38:19,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:19,683 INFO L413 NwaCegarLoop]: 1068 mSDtfsCounter, 521 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:19,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1614 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-04-01 12:38:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2687. [2023-04-01 12:38:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2678 states have (on average 1.2864077669902914) internal successors, (3445), 2683 states have internal predecessors, (3445), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3448 transitions. [2023-04-01 12:38:19,960 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3448 transitions. Word has length 59 [2023-04-01 12:38:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:19,961 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 3448 transitions. [2023-04-01 12:38:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3448 transitions. [2023-04-01 12:38:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:19,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:19,963 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] [2023-04-01 12:38:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:38:19,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:19,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1985703066, now seen corresponding path program 1 times [2023-04-01 12:38:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:19,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481476629] [2023-04-01 12:38:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:20,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481476629] [2023-04-01 12:38:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481476629] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594425662] [2023-04-01 12:38:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:20,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:20,031 INFO L87 Difference]: Start difference. First operand 2687 states and 3448 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:20,423 INFO L93 Difference]: Finished difference Result 3835 states and 5057 transitions. [2023-04-01 12:38:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 [2023-04-01 12:38:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:20,431 INFO L225 Difference]: With dead ends: 3835 [2023-04-01 12:38:20,431 INFO L226 Difference]: Without dead ends: 2878 [2023-04-01 12:38:20,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:20,433 INFO L413 NwaCegarLoop]: 1047 mSDtfsCounter, 494 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:20,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1605 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2023-04-01 12:38:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2876. [2023-04-01 12:38:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2867 states have (on average 1.2950819672131149) internal successors, (3713), 2872 states have internal predecessors, (3713), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3716 transitions. [2023-04-01 12:38:20,744 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3716 transitions. Word has length 59 [2023-04-01 12:38:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:20,744 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 3716 transitions. [2023-04-01 12:38:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3716 transitions. [2023-04-01 12:38:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:20,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:20,746 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] [2023-04-01 12:38:20,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:38:20,746 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:20,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash -575519370, now seen corresponding path program 1 times [2023-04-01 12:38:20,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:20,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717937150] [2023-04-01 12:38:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:20,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:20,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717937150] [2023-04-01 12:38:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717937150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:20,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543284462] [2023-04-01 12:38:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:20,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:20,813 INFO L87 Difference]: Start difference. First operand 2876 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:21,404 INFO L93 Difference]: Finished difference Result 5776 states and 7598 transitions. [2023-04-01 12:38:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:21,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 [2023-04-01 12:38:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:21,415 INFO L225 Difference]: With dead ends: 5776 [2023-04-01 12:38:21,415 INFO L226 Difference]: Without dead ends: 3965 [2023-04-01 12:38:21,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:21,419 INFO L413 NwaCegarLoop]: 1080 mSDtfsCounter, 577 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:21,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1778 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2023-04-01 12:38:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 3959. [2023-04-01 12:38:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3959 states, 3950 states have (on average 1.2863291139240507) internal successors, (5081), 3955 states have internal predecessors, (5081), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3959 states to 3959 states and 5084 transitions. [2023-04-01 12:38:22,085 INFO L78 Accepts]: Start accepts. Automaton has 3959 states and 5084 transitions. Word has length 59 [2023-04-01 12:38:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:22,085 INFO L495 AbstractCegarLoop]: Abstraction has 3959 states and 5084 transitions. [2023-04-01 12:38:22,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-04-01 12:38:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3959 states and 5084 transitions. [2023-04-01 12:38:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:22,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:22,091 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] [2023-04-01 12:38:22,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:38:22,091 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:22,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1699105273, now seen corresponding path program 1 times [2023-04-01 12:38:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:22,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009518889] [2023-04-01 12:38:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:22,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:22,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009518889] [2023-04-01 12:38:22,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009518889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:22,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:22,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988360124] [2023-04-01 12:38:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:22,153 INFO L87 Difference]: Start difference. First operand 3959 states and 5084 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:22,788 INFO L93 Difference]: Finished difference Result 7243 states and 9372 transitions. [2023-04-01 12:38:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:22,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 [2023-04-01 12:38:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:22,795 INFO L225 Difference]: With dead ends: 7243 [2023-04-01 12:38:22,795 INFO L226 Difference]: Without dead ends: 3805 [2023-04-01 12:38:22,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:22,801 INFO L413 NwaCegarLoop]: 937 mSDtfsCounter, 812 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:22,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1358 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2023-04-01 12:38:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 3033. [2023-04-01 12:38:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3024 states have (on average 1.289021164021164) internal successors, (3898), 3029 states have internal predecessors, (3898), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 3901 transitions. [2023-04-01 12:38:23,238 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 3901 transitions. Word has length 60 [2023-04-01 12:38:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 3033 states and 3901 transitions. [2023-04-01 12:38:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 3901 transitions. [2023-04-01 12:38:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:23,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:23,240 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] [2023-04-01 12:38:23,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:38:23,240 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:23,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1346739431, now seen corresponding path program 1 times [2023-04-01 12:38:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:23,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453381972] [2023-04-01 12:38:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:23,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:23,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453381972] [2023-04-01 12:38:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453381972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:23,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:23,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:23,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233327786] [2023-04-01 12:38:23,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:23,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:23,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:23,298 INFO L87 Difference]: Start difference. First operand 3033 states and 3901 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:23,784 INFO L93 Difference]: Finished difference Result 5384 states and 7040 transitions. [2023-04-01 12:38:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 [2023-04-01 12:38:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:23,810 INFO L225 Difference]: With dead ends: 5384 [2023-04-01 12:38:23,810 INFO L226 Difference]: Without dead ends: 2986 [2023-04-01 12:38:23,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:23,814 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 650 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:23,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 929 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-04-01 12:38:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2620. [2023-04-01 12:38:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2612 states have (on average 1.2967075038284839) internal successors, (3387), 2616 states have internal predecessors, (3387), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3390 transitions. [2023-04-01 12:38:24,281 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3390 transitions. Word has length 60 [2023-04-01 12:38:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:24,282 INFO L495 AbstractCegarLoop]: Abstraction has 2620 states and 3390 transitions. [2023-04-01 12:38:24,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3390 transitions. [2023-04-01 12:38:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:24,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:24,284 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] [2023-04-01 12:38:24,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:38:24,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:24,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash -429174243, now seen corresponding path program 1 times [2023-04-01 12:38:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:24,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240090805] [2023-04-01 12:38:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:24,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:24,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240090805] [2023-04-01 12:38:24,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240090805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:24,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:24,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:38:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317939481] [2023-04-01 12:38:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:38:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:38:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:38:24,850 INFO L87 Difference]: Start difference. First operand 2620 states and 3390 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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) [2023-04-01 12:38:26,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,551 INFO L93 Difference]: Finished difference Result 4875 states and 6315 transitions. [2023-04-01 12:38:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:38:26,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 [2023-04-01 12:38:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,559 INFO L225 Difference]: With dead ends: 4875 [2023-04-01 12:38:26,559 INFO L226 Difference]: Without dead ends: 4595 [2023-04-01 12:38:26,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:38:26,560 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 3963 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3963 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3963 Valid, 2908 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2023-04-01 12:38:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 2574. [2023-04-01 12:38:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2568 states have (on average 1.2978971962616823) internal successors, (3333), 2570 states have internal predecessors, (3333), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3336 transitions. [2023-04-01 12:38:27,042 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3336 transitions. Word has length 60 [2023-04-01 12:38:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:27,042 INFO L495 AbstractCegarLoop]: Abstraction has 2574 states and 3336 transitions. [2023-04-01 12:38:27,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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) [2023-04-01 12:38:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3336 transitions. [2023-04-01 12:38:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:27,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:27,043 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] [2023-04-01 12:38:27,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:38:27,044 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:27,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1470877886, now seen corresponding path program 1 times [2023-04-01 12:38:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391268356] [2023-04-01 12:38:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:27,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391268356] [2023-04-01 12:38:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391268356] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:27,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:27,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048446987] [2023-04-01 12:38:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:27,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:27,102 INFO L87 Difference]: Start difference. First operand 2574 states and 3336 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:27,671 INFO L93 Difference]: Finished difference Result 4795 states and 6298 transitions. [2023-04-01 12:38:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 [2023-04-01 12:38:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:27,675 INFO L225 Difference]: With dead ends: 4795 [2023-04-01 12:38:27,675 INFO L226 Difference]: Without dead ends: 2598 [2023-04-01 12:38:27,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:27,679 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 455 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:27,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 658 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2023-04-01 12:38:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2297. [2023-04-01 12:38:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2292 states have (on average 1.3045375218150088) internal successors, (2990), 2293 states have internal predecessors, (2990), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 2993 transitions. [2023-04-01 12:38:28,108 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 2993 transitions. Word has length 60 [2023-04-01 12:38:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:28,109 INFO L495 AbstractCegarLoop]: Abstraction has 2297 states and 2993 transitions. [2023-04-01 12:38:28,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 12:38:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 2993 transitions. [2023-04-01 12:38:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 12:38:28,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:28,110 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] [2023-04-01 12:38:28,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:38:28,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:28,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -940249861, now seen corresponding path program 1 times [2023-04-01 12:38:28,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:28,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583474437] [2023-04-01 12:38:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:28,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:28,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583474437] [2023-04-01 12:38:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583474437] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:28,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:28,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793059159] [2023-04-01 12:38:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:28,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:28,578 INFO L87 Difference]: Start difference. First operand 2297 states and 2993 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,109 INFO L93 Difference]: Finished difference Result 3929 states and 5119 transitions. [2023-04-01 12:38:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:38:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 61 [2023-04-01 12:38:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,115 INFO L225 Difference]: With dead ends: 3929 [2023-04-01 12:38:30,115 INFO L226 Difference]: Without dead ends: 3925 [2023-04-01 12:38:30,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:38:30,116 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 2903 mSDsluCounter, 2548 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2903 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2903 Valid, 3129 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:38:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2023-04-01 12:38:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 2293. [2023-04-01 12:38:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2289 states have (on average 1.3044997815640018) internal successors, (2986), 2289 states have internal predecessors, (2986), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2989 transitions. [2023-04-01 12:38:30,636 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2989 transitions. Word has length 61 [2023-04-01 12:38:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:30,636 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 2989 transitions. [2023-04-01 12:38:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2989 transitions. [2023-04-01 12:38:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 12:38:30,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:30,639 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] [2023-04-01 12:38:30,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:38:30,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:30,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1108945450, now seen corresponding path program 1 times [2023-04-01 12:38:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460334132] [2023-04-01 12:38:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:30,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460334132] [2023-04-01 12:38:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460334132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941680565] [2023-04-01 12:38:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:30,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:30,745 INFO L87 Difference]: Start difference. First operand 2293 states and 2989 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:31,306 INFO L93 Difference]: Finished difference Result 3851 states and 5092 transitions. [2023-04-01 12:38:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 65 [2023-04-01 12:38:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:31,309 INFO L225 Difference]: With dead ends: 3851 [2023-04-01 12:38:31,309 INFO L226 Difference]: Without dead ends: 2063 [2023-04-01 12:38:31,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:31,311 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 819 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 677 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-04-01 12:38:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2059. [2023-04-01 12:38:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2055 states have (on average 1.2939172749391727) internal successors, (2659), 2055 states have internal predecessors, (2659), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2662 transitions. [2023-04-01 12:38:31,805 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2662 transitions. Word has length 65 [2023-04-01 12:38:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:31,805 INFO L495 AbstractCegarLoop]: Abstraction has 2059 states and 2662 transitions. [2023-04-01 12:38:31,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2662 transitions. [2023-04-01 12:38:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:38:31,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:31,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:31,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:38:31,807 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:31,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -26811742, now seen corresponding path program 1 times [2023-04-01 12:38:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174587357] [2023-04-01 12:38:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:31,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174587357] [2023-04-01 12:38:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174587357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:31,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600214179] [2023-04-01 12:38:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:31,928 INFO L87 Difference]: Start difference. First operand 2059 states and 2662 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:32,717 INFO L93 Difference]: Finished difference Result 4379 states and 5806 transitions. [2023-04-01 12:38:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-04-01 12:38:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:32,721 INFO L225 Difference]: With dead ends: 4379 [2023-04-01 12:38:32,721 INFO L226 Difference]: Without dead ends: 2931 [2023-04-01 12:38:32,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:32,724 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 284 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 703 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2023-04-01 12:38:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2695. [2023-04-01 12:38:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2691 states have (on average 1.2950575994054254) internal successors, (3485), 2691 states have internal predecessors, (3485), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3488 transitions. [2023-04-01 12:38:33,413 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3488 transitions. Word has length 66 [2023-04-01 12:38:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:33,414 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 3488 transitions. [2023-04-01 12:38:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3488 transitions. [2023-04-01 12:38:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:38:33,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:33,415 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] [2023-04-01 12:38:33,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:38:33,415 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:33,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 759209855, now seen corresponding path program 1 times [2023-04-01 12:38:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564607464] [2023-04-01 12:38:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:33,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564607464] [2023-04-01 12:38:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564607464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:33,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:33,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084578296] [2023-04-01 12:38:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:33,528 INFO L87 Difference]: Start difference. First operand 2695 states and 3488 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:34,587 INFO L93 Difference]: Finished difference Result 6030 states and 7965 transitions. [2023-04-01 12:38:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 67 [2023-04-01 12:38:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:34,594 INFO L225 Difference]: With dead ends: 6030 [2023-04-01 12:38:34,594 INFO L226 Difference]: Without dead ends: 4008 [2023-04-01 12:38:34,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:34,597 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 229 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 731 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2023-04-01 12:38:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3654. [2023-04-01 12:38:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3654 states, 3650 states have (on average 1.2906849315068494) internal successors, (4711), 3650 states have internal predecessors, (4711), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 4714 transitions. [2023-04-01 12:38:35,584 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 4714 transitions. Word has length 67 [2023-04-01 12:38:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:35,584 INFO L495 AbstractCegarLoop]: Abstraction has 3654 states and 4714 transitions. [2023-04-01 12:38:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 4714 transitions. [2023-04-01 12:38:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 12:38:35,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:35,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:35,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:38:35,586 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:35,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1654774332, now seen corresponding path program 1 times [2023-04-01 12:38:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530072215] [2023-04-01 12:38:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:35,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:35,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530072215] [2023-04-01 12:38:35,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530072215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:35,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:35,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:35,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284774468] [2023-04-01 12:38:35,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:35,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:35,898 INFO L87 Difference]: Start difference. First operand 3654 states and 4714 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:38,652 INFO L93 Difference]: Finished difference Result 8268 states and 10670 transitions. [2023-04-01 12:38:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 12:38:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-01 12:38:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:38,682 INFO L225 Difference]: With dead ends: 8268 [2023-04-01 12:38:38,683 INFO L226 Difference]: Without dead ends: 8266 [2023-04-01 12:38:38,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:38:38,684 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 1850 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:38,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1850 Valid, 2684 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2023-04-01 12:38:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 4242. [2023-04-01 12:38:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4242 states, 4238 states have (on average 1.2855120339782917) internal successors, (5448), 4238 states have internal predecessors, (5448), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 5451 transitions. [2023-04-01 12:38:39,990 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 5451 transitions. Word has length 72 [2023-04-01 12:38:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:39,991 INFO L495 AbstractCegarLoop]: Abstraction has 4242 states and 5451 transitions. [2023-04-01 12:38:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 5451 transitions. [2023-04-01 12:38:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:38:39,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:39,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:39,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:38:39,993 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:39,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash -131412099, now seen corresponding path program 1 times [2023-04-01 12:38:39,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:39,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622703241] [2023-04-01 12:38:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:39,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:40,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622703241] [2023-04-01 12:38:40,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622703241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:40,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:40,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533674704] [2023-04-01 12:38:40,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:40,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:40,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:40,324 INFO L87 Difference]: Start difference. First operand 4242 states and 5451 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2023-04-01 12:38:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:43,129 INFO L93 Difference]: Finished difference Result 8143 states and 10508 transitions. [2023-04-01 12:38:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 78 [2023-04-01 12:38:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:43,139 INFO L225 Difference]: With dead ends: 8143 [2023-04-01 12:38:43,139 INFO L226 Difference]: Without dead ends: 8141 [2023-04-01 12:38:43,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:38:43,140 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 1463 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:43,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 2470 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8141 states. [2023-04-01 12:38:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8141 to 4571. [2023-04-01 12:38:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4567 states have (on average 1.2826800963433327) internal successors, (5858), 4567 states have internal predecessors, (5858), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 5861 transitions. [2023-04-01 12:38:44,599 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 5861 transitions. Word has length 78 [2023-04-01 12:38:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:44,599 INFO L495 AbstractCegarLoop]: Abstraction has 4571 states and 5861 transitions. [2023-04-01 12:38:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2023-04-01 12:38:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 5861 transitions. [2023-04-01 12:38:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:38:44,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:44,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:38:44,601 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:44,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 419094530, now seen corresponding path program 1 times [2023-04-01 12:38:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:44,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000408426] [2023-04-01 12:38:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:44,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000408426] [2023-04-01 12:38:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000408426] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521857021] [2023-04-01 12:38:44,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:44,903 INFO L87 Difference]: Start difference. First operand 4571 states and 5861 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2023-04-01 12:38:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:47,643 INFO L93 Difference]: Finished difference Result 7362 states and 9502 transitions. [2023-04-01 12:38:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:38:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 79 [2023-04-01 12:38:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:47,651 INFO L225 Difference]: With dead ends: 7362 [2023-04-01 12:38:47,651 INFO L226 Difference]: Without dead ends: 7360 [2023-04-01 12:38:47,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:38:47,652 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1469 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:47,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 2931 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2023-04-01 12:38:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 4543. [2023-04-01 12:38:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4539 states have (on average 1.2828816920026438) internal successors, (5823), 4539 states have internal predecessors, (5823), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 5826 transitions. [2023-04-01 12:38:49,143 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 5826 transitions. Word has length 79 [2023-04-01 12:38:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:49,143 INFO L495 AbstractCegarLoop]: Abstraction has 4543 states and 5826 transitions. [2023-04-01 12:38:49,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2023-04-01 12:38:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 5826 transitions. [2023-04-01 12:38:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:38:49,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:49,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:38:49,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:49,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1784435937, now seen corresponding path program 1 times [2023-04-01 12:38:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465019663] [2023-04-01 12:38:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:49,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465019663] [2023-04-01 12:38:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465019663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:49,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499200885] [2023-04-01 12:38:49,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:49,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:49,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:49,443 INFO L87 Difference]: Start difference. First operand 4543 states and 5826 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2023-04-01 12:38:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:52,530 INFO L93 Difference]: Finished difference Result 8320 states and 10723 transitions. [2023-04-01 12:38:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 79 [2023-04-01 12:38:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:52,539 INFO L225 Difference]: With dead ends: 8320 [2023-04-01 12:38:52,539 INFO L226 Difference]: Without dead ends: 8318 [2023-04-01 12:38:52,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:38:52,541 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 1443 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:52,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2859 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2023-04-01 12:38:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 4870. [2023-04-01 12:38:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4866 states have (on average 1.280517879161529) internal successors, (6231), 4866 states have internal predecessors, (6231), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 6234 transitions. [2023-04-01 12:38:54,233 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 6234 transitions. Word has length 79 [2023-04-01 12:38:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:54,234 INFO L495 AbstractCegarLoop]: Abstraction has 4870 states and 6234 transitions. [2023-04-01 12:38:54,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2023-04-01 12:38:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 6234 transitions. [2023-04-01 12:38:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 12:38:54,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:54,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:54,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 12:38:54,236 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:54,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 959023234, now seen corresponding path program 1 times [2023-04-01 12:38:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034971934] [2023-04-01 12:38:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:54,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034971934] [2023-04-01 12:38:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034971934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:54,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:54,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923956317] [2023-04-01 12:38:54,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:54,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:54,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:54,348 INFO L87 Difference]: Start difference. First operand 4870 states and 6234 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:56,525 INFO L93 Difference]: Finished difference Result 9278 states and 12110 transitions. [2023-04-01 12:38:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 [2023-04-01 12:38:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:56,533 INFO L225 Difference]: With dead ends: 9278 [2023-04-01 12:38:56,533 INFO L226 Difference]: Without dead ends: 6452 [2023-04-01 12:38:56,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:56,537 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 288 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:56,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 698 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2023-04-01 12:38:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 6018. [2023-04-01 12:38:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 6014 states have (on average 1.277851679414699) internal successors, (7685), 6014 states have internal predecessors, (7685), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 7688 transitions. [2023-04-01 12:38:58,640 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 7688 transitions. Word has length 82 [2023-04-01 12:38:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:58,640 INFO L495 AbstractCegarLoop]: Abstraction has 6018 states and 7688 transitions. [2023-04-01 12:38:58,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 7688 transitions. [2023-04-01 12:38:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 12:38:58,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:58,642 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:38:58,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 12:38:58,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:58,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1767913593, now seen corresponding path program 1 times [2023-04-01 12:38:58,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:58,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109268933] [2023-04-01 12:38:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:58,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:59,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109268933] [2023-04-01 12:38:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109268933] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:38:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390618243] [2023-04-01 12:38:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:59,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:38:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:59,614 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) [2023-04-01 12:38:59,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:39:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:00,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 12:39:00,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:39:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:39:00,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:39:00,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390618243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:00,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:39:00,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-04-01 12:39:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032115177] [2023-04-01 12:39:00,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:39:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:39:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:39:00,259 INFO L87 Difference]: Start difference. First operand 6018 states and 7688 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 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)