/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:35:35,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:35:35,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:35:35,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:35:35,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:35:35,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:35:35,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:35:35,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:35:35,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:35:35,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:35:35,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:35:35,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:35:35,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:35:35,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:35:35,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:35:35,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:35:35,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:35:35,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:35:35,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:35:35,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:35:35,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:35:35,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:35:35,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:35:35,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:35:35,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:35:35,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:35:35,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:35:35,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:35:35,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:35:35,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:35:35,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:35:35,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:35:35,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:35:35,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:35:35,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:35:35,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:35:35,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:35:35,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:35:35,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:35:35,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:35:35,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:35:35,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:35:35,910 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:35:35,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:35:35,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:35:35,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:35:35,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:35:35,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:35:35,912 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:35:35,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:35:35,912 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:35:35,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:35:35,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:35:35,913 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:35:35,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:35:35,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:35:35,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:35,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:35:35,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:35:35,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:35:36,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:35:36,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:35:36,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:35:36,132 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:35:36,132 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:35:36,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-03 02:35:37,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:35:37,437 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:35:37,437 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-03 02:35:37,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af1f2317/afd8d7405d2742d696a256781597d28f/FLAGf7f97d266 [2023-04-03 02:35:37,469 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af1f2317/afd8d7405d2742d696a256781597d28f [2023-04-03 02:35:37,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:35:37,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:35:37,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:37,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:35:37,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:35:37,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:37" (1/1) ... [2023-04-03 02:35:37,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5564b3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:37, skipping insertion in model container [2023-04-03 02:35:37,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:37" (1/1) ... [2023-04-03 02:35:37,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:35:37,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:35:37,798 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2023-04-03 02:35:37,827 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2023-04-03 02:35:37,858 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2023-04-03 02:35:37,888 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2023-04-03 02:35:37,921 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2023-04-03 02:35:37,952 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2023-04-03 02:35:38,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:38,123 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:35:38,170 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2023-04-03 02:35:38,179 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2023-04-03 02:35:38,198 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2023-04-03 02:35:38,214 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2023-04-03 02:35:38,261 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2023-04-03 02:35:38,310 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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2023-04-03 02:35:38,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:38,391 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:35:38,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38 WrapperNode [2023-04-03 02:35:38,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:38,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:35:38,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:35:38,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:35:38,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:35:38,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:35:38,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:35:38,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:35:38,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (1/1) ... [2023-04-03 02:35:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:38,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:35:38,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:35:38,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:35:38,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:35:38,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:35:38,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:35:38,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:35:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:35:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:35:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:35:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:35:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:35:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:35:38,900 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:35:38,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:35:40,577 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:35:40,833 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:35:40,834 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:35:40,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:40 BoogieIcfgContainer [2023-04-03 02:35:40,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:35:40,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:35:40,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:35:40,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:35:40,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:35:37" (1/3) ... [2023-04-03 02:35:40,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0c80af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:40, skipping insertion in model container [2023-04-03 02:35:40,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:38" (2/3) ... [2023-04-03 02:35:40,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0c80af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:40, skipping insertion in model container [2023-04-03 02:35:40,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:40" (3/3) ... [2023-04-03 02:35:40,844 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-03 02:35:40,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:35:40,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-04-03 02:35:40,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:35:40,913 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;@4f04dffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:35:40,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-04-03 02:35:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 1059 states, 1048 states have (on average 1.833969465648855) internal successors, (1922), 1054 states have internal predecessors, (1922), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:35:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:40,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:40,936 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] [2023-04-03 02:35:40,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:40,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:40,940 INFO L85 PathProgramCache]: Analyzing trace with hash -182128908, now seen corresponding path program 1 times [2023-04-03 02:35:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121005386] [2023-04-03 02:35:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:41,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121005386] [2023-04-03 02:35:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121005386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105096131] [2023-04-03 02:35:41,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:41,367 INFO L87 Difference]: Start difference. First operand has 1059 states, 1048 states have (on average 1.833969465648855) internal successors, (1922), 1054 states have internal predecessors, (1922), 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 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:42,280 INFO L93 Difference]: Finished difference Result 1766 states and 3128 transitions. [2023-04-03 02:35:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:42,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-03 02:35:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:42,299 INFO L225 Difference]: With dead ends: 1766 [2023-04-03 02:35:42,299 INFO L226 Difference]: Without dead ends: 1132 [2023-04-03 02:35:42,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:42,312 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 5407 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5407 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:42,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5407 Valid, 1171 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:35:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-04-03 02:35:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1122. [2023-04-03 02:35:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1113 states have (on average 1.3009883198562444) internal successors, (1448), 1118 states have internal predecessors, (1448), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1451 transitions. [2023-04-03 02:35:42,390 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1451 transitions. Word has length 54 [2023-04-03 02:35:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:42,391 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1451 transitions. [2023-04-03 02:35:42,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1451 transitions. [2023-04-03 02:35:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:42,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:42,393 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] [2023-04-03 02:35:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:35:42,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:42,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1269270269, now seen corresponding path program 1 times [2023-04-03 02:35:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380528704] [2023-04-03 02:35:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:42,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:42,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:42,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380528704] [2023-04-03 02:35:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380528704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:42,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528088977] [2023-04-03 02:35:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:42,520 INFO L87 Difference]: Start difference. First operand 1122 states and 1451 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:43,212 INFO L93 Difference]: Finished difference Result 2239 states and 2923 transitions. [2023-04-03 02:35:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-03 02:35:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:43,218 INFO L225 Difference]: With dead ends: 2239 [2023-04-03 02:35:43,219 INFO L226 Difference]: Without dead ends: 1480 [2023-04-03 02:35:43,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:43,222 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 3678 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3678 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:43,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3678 Valid, 679 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:35:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-03 02:35:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1468. [2023-04-03 02:35:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1459 states have (on average 1.3070596298834818) internal successors, (1907), 1464 states have internal predecessors, (1907), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1910 transitions. [2023-04-03 02:35:43,309 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1910 transitions. Word has length 54 [2023-04-03 02:35:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:43,310 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 1910 transitions. [2023-04-03 02:35:43,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1910 transitions. [2023-04-03 02:35:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:43,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:43,314 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] [2023-04-03 02:35:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:35:43,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:43,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 835596760, now seen corresponding path program 1 times [2023-04-03 02:35:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:43,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764067933] [2023-04-03 02:35:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:43,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:43,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764067933] [2023-04-03 02:35:43,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764067933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:43,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630226723] [2023-04-03 02:35:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:43,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:43,448 INFO L87 Difference]: Start difference. First operand 1468 states and 1910 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:44,046 INFO L93 Difference]: Finished difference Result 2831 states and 3717 transitions. [2023-04-03 02:35:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-03 02:35:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:44,053 INFO L225 Difference]: With dead ends: 2831 [2023-04-03 02:35:44,053 INFO L226 Difference]: Without dead ends: 2103 [2023-04-03 02:35:44,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:44,057 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 3338 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3338 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:44,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3338 Valid, 650 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:35:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2023-04-03 02:35:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 2097. [2023-04-03 02:35:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2088 states have (on average 1.2978927203065134) internal successors, (2710), 2093 states have internal predecessors, (2710), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2713 transitions. [2023-04-03 02:35:44,141 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2713 transitions. Word has length 54 [2023-04-03 02:35:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:44,142 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2713 transitions. [2023-04-03 02:35:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2713 transitions. [2023-04-03 02:35:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:35:44,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:44,145 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] [2023-04-03 02:35:44,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:35:44,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:44,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -339947619, now seen corresponding path program 1 times [2023-04-03 02:35:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348041057] [2023-04-03 02:35:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:44,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348041057] [2023-04-03 02:35:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348041057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:44,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:35:44,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083268711] [2023-04-03 02:35:44,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:35:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:35:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:35:44,557 INFO L87 Difference]: Start difference. First operand 2097 states and 2713 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2023-04-03 02:35:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:45,716 INFO L93 Difference]: Finished difference Result 3459 states and 4573 transitions. [2023-04-03 02:35:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:35:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 [2023-04-03 02:35:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:45,728 INFO L225 Difference]: With dead ends: 3459 [2023-04-03 02:35:45,728 INFO L226 Difference]: Without dead ends: 3012 [2023-04-03 02:35:45,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:35:45,735 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 4742 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4742 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:45,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4742 Valid, 1421 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:35:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2023-04-03 02:35:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2097. [2023-04-03 02:35:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2088 states have (on average 1.2974137931034482) internal successors, (2709), 2093 states have internal predecessors, (2709), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2712 transitions. [2023-04-03 02:35:45,863 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2712 transitions. Word has length 55 [2023-04-03 02:35:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:45,864 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2712 transitions. [2023-04-03 02:35:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2023-04-03 02:35:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2712 transitions. [2023-04-03 02:35:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:35:45,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:45,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:45,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:35:45,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:45,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1369105017, now seen corresponding path program 1 times [2023-04-03 02:35:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472504117] [2023-04-03 02:35:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:46,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472504117] [2023-04-03 02:35:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472504117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:46,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:35:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128852219] [2023-04-03 02:35:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:35:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:35:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:35:46,179 INFO L87 Difference]: Start difference. First operand 2097 states and 2712 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2023-04-03 02:35:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:47,634 INFO L93 Difference]: Finished difference Result 3185 states and 4163 transitions. [2023-04-03 02:35:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:35:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 [2023-04-03 02:35:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:47,643 INFO L225 Difference]: With dead ends: 3185 [2023-04-03 02:35:47,644 INFO L226 Difference]: Without dead ends: 3180 [2023-04-03 02:35:47,644 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 [2023-04-03 02:35:47,645 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 4781 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4781 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:47,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4781 Valid, 1988 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:35:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2023-04-03 02:35:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2097. [2023-04-03 02:35:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2088 states have (on average 1.2969348659003832) internal successors, (2708), 2093 states have internal predecessors, (2708), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2711 transitions. [2023-04-03 02:35:47,777 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2711 transitions. Word has length 55 [2023-04-03 02:35:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:47,777 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2711 transitions. [2023-04-03 02:35:47,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2023-04-03 02:35:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2711 transitions. [2023-04-03 02:35:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:35:47,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:47,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:47,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:35:47,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:47,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1119328062, now seen corresponding path program 1 times [2023-04-03 02:35:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092626365] [2023-04-03 02:35:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:48,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092626365] [2023-04-03 02:35:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092626365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:48,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:35:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810410770] [2023-04-03 02:35:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:48,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:35:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:35:48,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:35:48,005 INFO L87 Difference]: Start difference. First operand 2097 states and 2711 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2023-04-03 02:35:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:49,655 INFO L93 Difference]: Finished difference Result 3837 states and 5091 transitions. [2023-04-03 02:35:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:35:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 [2023-04-03 02:35:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:49,666 INFO L225 Difference]: With dead ends: 3837 [2023-04-03 02:35:49,666 INFO L226 Difference]: Without dead ends: 3514 [2023-04-03 02:35:49,668 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 [2023-04-03 02:35:49,668 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 4840 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4840 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:49,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4840 Valid, 2343 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:35:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2023-04-03 02:35:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2097. [2023-04-03 02:35:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2088 states have (on average 1.296455938697318) internal successors, (2707), 2093 states have internal predecessors, (2707), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2710 transitions. [2023-04-03 02:35:49,835 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2710 transitions. Word has length 55 [2023-04-03 02:35:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2710 transitions. [2023-04-03 02:35:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2023-04-03 02:35:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2710 transitions. [2023-04-03 02:35:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:35:49,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:49,838 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] [2023-04-03 02:35:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:35:49,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:49,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1210299908, now seen corresponding path program 1 times [2023-04-03 02:35:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:49,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308028403] [2023-04-03 02:35:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:49,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:49,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308028403] [2023-04-03 02:35:49,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308028403] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:49,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:49,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929504546] [2023-04-03 02:35:49,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:49,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:49,894 INFO L87 Difference]: Start difference. First operand 2097 states and 2710 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:50,169 INFO L93 Difference]: Finished difference Result 2859 states and 3769 transitions. [2023-04-03 02:35:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-03 02:35:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:50,174 INFO L225 Difference]: With dead ends: 2859 [2023-04-03 02:35:50,175 INFO L226 Difference]: Without dead ends: 1806 [2023-04-03 02:35:50,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:50,177 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 522 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:50,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1129 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-04-03 02:35:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1804. [2023-04-03 02:35:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1795 states have (on average 1.2707520891364903) internal successors, (2281), 1800 states have internal predecessors, (2281), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2284 transitions. [2023-04-03 02:35:50,340 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2284 transitions. Word has length 56 [2023-04-03 02:35:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:50,340 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2284 transitions. [2023-04-03 02:35:50,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2284 transitions. [2023-04-03 02:35:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:35:50,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:50,342 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] [2023-04-03 02:35:50,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:35:50,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:50,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2106213718, now seen corresponding path program 1 times [2023-04-03 02:35:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:50,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741373054] [2023-04-03 02:35:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:50,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741373054] [2023-04-03 02:35:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741373054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326472485] [2023-04-03 02:35:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:50,398 INFO L87 Difference]: Start difference. First operand 1804 states and 2284 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:50,691 INFO L93 Difference]: Finished difference Result 2820 states and 3741 transitions. [2023-04-03 02:35:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-03 02:35:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:50,697 INFO L225 Difference]: With dead ends: 2820 [2023-04-03 02:35:50,697 INFO L226 Difference]: Without dead ends: 2064 [2023-04-03 02:35:50,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:50,699 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 354 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1246 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2023-04-03 02:35:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2062. [2023-04-03 02:35:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2053 states have (on average 1.2951777886020457) internal successors, (2659), 2058 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) [2023-04-03 02:35:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2662 transitions. [2023-04-03 02:35:50,963 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2662 transitions. Word has length 56 [2023-04-03 02:35:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:50,963 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 2662 transitions. [2023-04-03 02:35:50,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2662 transitions. [2023-04-03 02:35:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:35:50,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:50,966 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] [2023-04-03 02:35:50,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:35:50,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:50,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:50,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1950430414, now seen corresponding path program 1 times [2023-04-03 02:35:50,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:50,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42891614] [2023-04-03 02:35:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:50,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:51,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42891614] [2023-04-03 02:35:51,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42891614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:51,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:51,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405183315] [2023-04-03 02:35:51,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:51,019 INFO L87 Difference]: Start difference. First operand 2062 states and 2662 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:51,483 INFO L93 Difference]: Finished difference Result 3675 states and 4960 transitions. [2023-04-03 02:35:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-03 02:35:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:51,491 INFO L225 Difference]: With dead ends: 3675 [2023-04-03 02:35:51,491 INFO L226 Difference]: Without dead ends: 2605 [2023-04-03 02:35:51,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:51,494 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 367 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:51,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1188 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2023-04-03 02:35:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2603. [2023-04-03 02:35:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2594 states have (on average 1.3215111796453354) internal successors, (3428), 2599 states have internal predecessors, (3428), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3431 transitions. [2023-04-03 02:35:51,889 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3431 transitions. Word has length 56 [2023-04-03 02:35:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:51,890 INFO L495 AbstractCegarLoop]: Abstraction has 2603 states and 3431 transitions. [2023-04-03 02:35:51,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3431 transitions. [2023-04-03 02:35:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:35:51,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:51,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:51,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:35:51,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:51,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -566739212, now seen corresponding path program 1 times [2023-04-03 02:35:51,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:51,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364500256] [2023-04-03 02:35:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:51,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:51,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364500256] [2023-04-03 02:35:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364500256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883239387] [2023-04-03 02:35:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:51,948 INFO L87 Difference]: Start difference. First operand 2603 states and 3431 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:52,411 INFO L93 Difference]: Finished difference Result 4615 states and 6195 transitions. [2023-04-03 02:35:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:35:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:52,418 INFO L225 Difference]: With dead ends: 4615 [2023-04-03 02:35:52,418 INFO L226 Difference]: Without dead ends: 2529 [2023-04-03 02:35:52,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:52,421 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 559 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:52,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 805 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2023-04-03 02:35:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2217. [2023-04-03 02:35:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2209 states have (on average 1.3268447261204164) internal successors, (2931), 2213 states have internal predecessors, (2931), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2934 transitions. [2023-04-03 02:35:52,784 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2934 transitions. Word has length 57 [2023-04-03 02:35:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:52,784 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2934 transitions. [2023-04-03 02:35:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2934 transitions. [2023-04-03 02:35:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:35:52,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:52,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:52,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:35:52,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:52,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1694679420, now seen corresponding path program 1 times [2023-04-03 02:35:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:52,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702071776] [2023-04-03 02:35:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:52,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:52,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702071776] [2023-04-03 02:35:52,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702071776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:52,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:52,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765753423] [2023-04-03 02:35:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:52,840 INFO L87 Difference]: Start difference. First operand 2217 states and 2934 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:53,289 INFO L93 Difference]: Finished difference Result 4106 states and 5516 transitions. [2023-04-03 02:35:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:35:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:53,296 INFO L225 Difference]: With dead ends: 4106 [2023-04-03 02:35:53,296 INFO L226 Difference]: Without dead ends: 2237 [2023-04-03 02:35:53,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:53,299 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 447 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:53,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 600 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2023-04-03 02:35:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1975. [2023-04-03 02:35:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1968 states have (on average 1.3348577235772359) internal successors, (2627), 1971 states have internal predecessors, (2627), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2630 transitions. [2023-04-03 02:35:53,690 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2630 transitions. Word has length 57 [2023-04-03 02:35:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:53,690 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2630 transitions. [2023-04-03 02:35:53,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2630 transitions. [2023-04-03 02:35:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:35:53,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:53,691 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] [2023-04-03 02:35:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:35:53,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:53,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1124726175, now seen corresponding path program 1 times [2023-04-03 02:35:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145305529] [2023-04-03 02:35:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:54,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145305529] [2023-04-03 02:35:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145305529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:54,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:35:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308590933] [2023-04-03 02:35:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:54,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:35:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:35:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:35:54,146 INFO L87 Difference]: Start difference. First operand 1975 states and 2630 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:55,676 INFO L93 Difference]: Finished difference Result 3765 states and 5015 transitions. [2023-04-03 02:35:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:35:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 58 [2023-04-03 02:35:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:55,688 INFO L225 Difference]: With dead ends: 3765 [2023-04-03 02:35:55,688 INFO L226 Difference]: Without dead ends: 3761 [2023-04-03 02:35:55,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:35:55,690 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 2991 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:55,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2991 Valid, 2701 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:35:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2023-04-03 02:35:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 1971. [2023-04-03 02:35:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1965 states have (on average 1.3348600508905852) internal successors, (2623), 1967 states have internal predecessors, (2623), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2626 transitions. [2023-04-03 02:35:56,093 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2626 transitions. Word has length 58 [2023-04-03 02:35:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:56,094 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2626 transitions. [2023-04-03 02:35:56,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2626 transitions. [2023-04-03 02:35:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:35:56,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:56,099 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] [2023-04-03 02:35:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:35:56,099 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:56,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1749674959, now seen corresponding path program 1 times [2023-04-03 02:35:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691832986] [2023-04-03 02:35:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:56,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:56,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691832986] [2023-04-03 02:35:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691832986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:56,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:35:56,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089661805] [2023-04-03 02:35:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:56,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:35:56,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:35:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:35:56,532 INFO L87 Difference]: Start difference. First operand 1971 states and 2626 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:58,384 INFO L93 Difference]: Finished difference Result 3977 states and 5294 transitions. [2023-04-03 02:35:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:35:58,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 58 [2023-04-03 02:35:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:58,392 INFO L225 Difference]: With dead ends: 3977 [2023-04-03 02:35:58,392 INFO L226 Difference]: Without dead ends: 3973 [2023-04-03 02:35:58,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:35:58,395 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 2952 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2952 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:58,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2952 Valid, 3226 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:35:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2023-04-03 02:35:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 1967. [2023-04-03 02:35:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1962 states have (on average 1.334862385321101) internal successors, (2619), 1963 states have internal predecessors, (2619), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2622 transitions. [2023-04-03 02:35:58,822 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2622 transitions. Word has length 58 [2023-04-03 02:35:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:58,822 INFO L495 AbstractCegarLoop]: Abstraction has 1967 states and 2622 transitions. [2023-04-03 02:35:58,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2622 transitions. [2023-04-03 02:35:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:35:58,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:58,824 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] [2023-04-03 02:35:58,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:35:58,825 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:35:58,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1059399209, now seen corresponding path program 1 times [2023-04-03 02:35:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59466970] [2023-04-03 02:35:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:59,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:59,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59466970] [2023-04-03 02:35:59,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59466970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:59,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:59,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:35:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631157678] [2023-04-03 02:35:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:35:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:35:59,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:35:59,234 INFO L87 Difference]: Start difference. First operand 1967 states and 2622 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:00,969 INFO L93 Difference]: Finished difference Result 3701 states and 4923 transitions. [2023-04-03 02:36:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:36:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 58 [2023-04-03 02:36:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:00,975 INFO L225 Difference]: With dead ends: 3701 [2023-04-03 02:36:00,976 INFO L226 Difference]: Without dead ends: 3479 [2023-04-03 02:36:00,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:36:00,977 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 2815 mSDsluCounter, 2847 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2815 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:00,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2815 Valid, 3554 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:36:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2023-04-03 02:36:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 1955. [2023-04-03 02:36:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1951 states have (on average 1.3352127114300358) internal successors, (2605), 1951 states have internal predecessors, (2605), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2608 transitions. [2023-04-03 02:36:01,497 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2608 transitions. Word has length 58 [2023-04-03 02:36:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:01,497 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 2608 transitions. [2023-04-03 02:36:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2608 transitions. [2023-04-03 02:36:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:36:01,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:01,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:01,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:36:01,499 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:01,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash -206394821, now seen corresponding path program 1 times [2023-04-03 02:36:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965818415] [2023-04-03 02:36:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:01,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965818415] [2023-04-03 02:36:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965818415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334748120] [2023-04-03 02:36:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:01,597 INFO L87 Difference]: Start difference. First operand 1955 states and 2608 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) [2023-04-03 02:36:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:02,437 INFO L93 Difference]: Finished difference Result 4390 states and 6014 transitions. [2023-04-03 02:36:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:02,437 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 [2023-04-03 02:36:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:02,441 INFO L225 Difference]: With dead ends: 4390 [2023-04-03 02:36:02,441 INFO L226 Difference]: Without dead ends: 2916 [2023-04-03 02:36:02,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:02,444 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 217 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:02,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 720 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2023-04-03 02:36:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2608. [2023-04-03 02:36:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2604 states have (on average 1.3352534562211982) internal successors, (3477), 2604 states have internal predecessors, (3477), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3480 transitions. [2023-04-03 02:36:03,174 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3480 transitions. Word has length 59 [2023-04-03 02:36:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:03,174 INFO L495 AbstractCegarLoop]: Abstraction has 2608 states and 3480 transitions. [2023-04-03 02:36:03,174 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) [2023-04-03 02:36:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3480 transitions. [2023-04-03 02:36:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:36:03,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:03,175 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] [2023-04-03 02:36:03,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:36:03,176 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:03,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 266431531, now seen corresponding path program 1 times [2023-04-03 02:36:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33017263] [2023-04-03 02:36:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:03,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:03,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33017263] [2023-04-03 02:36:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33017263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:03,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:03,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:36:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328395480] [2023-04-03 02:36:03,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:36:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:36:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:36:03,264 INFO L87 Difference]: Start difference. First operand 2608 states and 3480 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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) [2023-04-03 02:36:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:04,075 INFO L93 Difference]: Finished difference Result 4426 states and 5981 transitions. [2023-04-03 02:36:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:36:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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 [2023-04-03 02:36:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:04,081 INFO L225 Difference]: With dead ends: 4426 [2023-04-03 02:36:04,082 INFO L226 Difference]: Without dead ends: 2360 [2023-04-03 02:36:04,086 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 [2023-04-03 02:36:04,088 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 730 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:04,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 638 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2023-04-03 02:36:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2356. [2023-04-03 02:36:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2352 states have (on average 1.3248299319727892) internal successors, (3116), 2352 states have internal predecessors, (3116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3119 transitions. [2023-04-03 02:36:04,823 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3119 transitions. Word has length 61 [2023-04-03 02:36:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:04,823 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 3119 transitions. [2023-04-03 02:36:04,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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) [2023-04-03 02:36:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3119 transitions. [2023-04-03 02:36:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:36:04,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:04,824 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] [2023-04-03 02:36:04,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:36:04,824 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:04,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1543115853, now seen corresponding path program 1 times [2023-04-03 02:36:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:04,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8133974] [2023-04-03 02:36:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:04,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8133974] [2023-04-03 02:36:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8133974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:04,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537082229] [2023-04-03 02:36:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:04,933 INFO L87 Difference]: Start difference. First operand 2356 states and 3119 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:06,001 INFO L93 Difference]: Finished difference Result 5032 states and 6819 transitions. [2023-04-03 02:36:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 02:36:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:06,008 INFO L225 Difference]: With dead ends: 5032 [2023-04-03 02:36:06,008 INFO L226 Difference]: Without dead ends: 3320 [2023-04-03 02:36:06,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:06,012 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 252 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:06,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 643 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2023-04-03 02:36:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 3024. [2023-04-03 02:36:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3020 states have (on average 1.3228476821192052) internal successors, (3995), 3020 states have internal predecessors, (3995), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 3998 transitions. [2023-04-03 02:36:07,060 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 3998 transitions. Word has length 63 [2023-04-03 02:36:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:07,060 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 3998 transitions. [2023-04-03 02:36:07,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 3998 transitions. [2023-04-03 02:36:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:36:07,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:07,062 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] [2023-04-03 02:36:07,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:36:07,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:07,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash -23969667, now seen corresponding path program 1 times [2023-04-03 02:36:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:07,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890164715] [2023-04-03 02:36:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:07,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890164715] [2023-04-03 02:36:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890164715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:07,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681150762] [2023-04-03 02:36:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:07,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:07,328 INFO L87 Difference]: Start difference. First operand 3024 states and 3998 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:09,861 INFO L93 Difference]: Finished difference Result 6295 states and 8289 transitions. [2023-04-03 02:36:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:36:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 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 64 [2023-04-03 02:36:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:09,872 INFO L225 Difference]: With dead ends: 6295 [2023-04-03 02:36:09,872 INFO L226 Difference]: Without dead ends: 6293 [2023-04-03 02:36:09,873 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 [2023-04-03 02:36:09,873 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 1726 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:09,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 2167 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2023-04-03 02:36:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 3525. [2023-04-03 02:36:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3521 states have (on average 1.3172394206191422) internal successors, (4638), 3521 states have internal predecessors, (4638), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 4641 transitions. [2023-04-03 02:36:11,131 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 4641 transitions. Word has length 64 [2023-04-03 02:36:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:11,131 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 4641 transitions. [2023-04-03 02:36:11,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 4641 transitions. [2023-04-03 02:36:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 02:36:11,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:11,134 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] [2023-04-03 02:36:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:36:11,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:11,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1652129243, now seen corresponding path program 1 times [2023-04-03 02:36:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781870286] [2023-04-03 02:36:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:11,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781870286] [2023-04-03 02:36:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781870286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609845452] [2023-04-03 02:36:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:11,488 INFO L87 Difference]: Start difference. First operand 3525 states and 4641 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:14,052 INFO L93 Difference]: Finished difference Result 6153 states and 8104 transitions. [2023-04-03 02:36:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:36:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 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 70 [2023-04-03 02:36:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:14,061 INFO L225 Difference]: With dead ends: 6153 [2023-04-03 02:36:14,061 INFO L226 Difference]: Without dead ends: 6151 [2023-04-03 02:36:14,062 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 [2023-04-03 02:36:14,063 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 1288 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:14,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 2296 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2023-04-03 02:36:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 3799. [2023-04-03 02:36:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3795 states have (on average 1.3133069828722002) internal successors, (4984), 3795 states have internal predecessors, (4984), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 4987 transitions. [2023-04-03 02:36:15,525 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 4987 transitions. Word has length 70 [2023-04-03 02:36:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:15,525 INFO L495 AbstractCegarLoop]: Abstraction has 3799 states and 4987 transitions. [2023-04-03 02:36:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 4987 transitions. [2023-04-03 02:36:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:36:15,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:15,527 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] [2023-04-03 02:36:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:36:15,527 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:15,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2012667867, now seen corresponding path program 1 times [2023-04-03 02:36:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982752641] [2023-04-03 02:36:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:36:15,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982752641] [2023-04-03 02:36:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982752641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:15,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:15,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:15,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422596172] [2023-04-03 02:36:15,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:15,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:15,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:15,728 INFO L87 Difference]: Start difference. First operand 3799 states and 4987 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:18,966 INFO L93 Difference]: Finished difference Result 7683 states and 10045 transitions. [2023-04-03 02:36:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:36:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 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 72 [2023-04-03 02:36:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:18,976 INFO L225 Difference]: With dead ends: 7683 [2023-04-03 02:36:18,976 INFO L226 Difference]: Without dead ends: 6161 [2023-04-03 02:36:18,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:36:18,980 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1259 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:18,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1069 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:36:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2023-04-03 02:36:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 3785. [2023-04-03 02:36:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.314202591906903) internal successors, (4969), 3781 states have internal predecessors, (4969), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 4972 transitions. [2023-04-03 02:36:20,474 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 4972 transitions. Word has length 72 [2023-04-03 02:36:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:20,475 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 4972 transitions. [2023-04-03 02:36:20,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 4972 transitions. [2023-04-03 02:36:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:36:20,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:20,477 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] [2023-04-03 02:36:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:36:20,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:20,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1380860834, now seen corresponding path program 1 times [2023-04-03 02:36:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102474803] [2023-04-03 02:36:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:36:20,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102474803] [2023-04-03 02:36:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102474803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:36:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113515174] [2023-04-03 02:36:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:20,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:36:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:36:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:36:20,664 INFO L87 Difference]: Start difference. First operand 3785 states and 4972 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:22,932 INFO L93 Difference]: Finished difference Result 6158 states and 8110 transitions. [2023-04-03 02:36:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:36:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 72 [2023-04-03 02:36:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:22,939 INFO L225 Difference]: With dead ends: 6158 [2023-04-03 02:36:22,939 INFO L226 Difference]: Without dead ends: 4633 [2023-04-03 02:36:22,942 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 [2023-04-03 02:36:22,943 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 1602 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:22,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 778 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:36:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2023-04-03 02:36:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3593. [2023-04-03 02:36:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.311507383672332) internal successors, (4707), 3589 states have internal predecessors, (4707), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 4710 transitions. [2023-04-03 02:36:24,382 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 4710 transitions. Word has length 72 [2023-04-03 02:36:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:24,383 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 4710 transitions. [2023-04-03 02:36:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 4710 transitions. [2023-04-03 02:36:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:36:24,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:24,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:24,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:36:24,385 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:24,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:24,385 INFO L85 PathProgramCache]: Analyzing trace with hash -906677866, now seen corresponding path program 1 times [2023-04-03 02:36:24,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:24,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732018475] [2023-04-03 02:36:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:24,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:24,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732018475] [2023-04-03 02:36:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732018475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889032293] [2023-04-03 02:36:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:24,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:24,651 INFO L87 Difference]: Start difference. First operand 3593 states and 4710 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:27,302 INFO L93 Difference]: Finished difference Result 5725 states and 7551 transitions. [2023-04-03 02:36:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:36:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 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 73 [2023-04-03 02:36:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:27,310 INFO L225 Difference]: With dead ends: 5725 [2023-04-03 02:36:27,310 INFO L226 Difference]: Without dead ends: 5723 [2023-04-03 02:36:27,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:36:27,312 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1397 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:27,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1397 Valid, 2369 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2023-04-03 02:36:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 3568. [2023-04-03 02:36:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3564 states have (on average 1.3117283950617284) internal successors, (4675), 3564 states have internal predecessors, (4675), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 4678 transitions. [2023-04-03 02:36:28,769 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 4678 transitions. Word has length 73 [2023-04-03 02:36:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:28,769 INFO L495 AbstractCegarLoop]: Abstraction has 3568 states and 4678 transitions. [2023-04-03 02:36:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 4678 transitions. [2023-04-03 02:36:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:36:28,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:28,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:28,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:36:28,771 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:28,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash 481232229, now seen corresponding path program 1 times [2023-04-03 02:36:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974358822] [2023-04-03 02:36:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:29,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:29,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974358822] [2023-04-03 02:36:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974358822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:29,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149482559] [2023-04-03 02:36:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:29,047 INFO L87 Difference]: Start difference. First operand 3568 states and 4678 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:31,935 INFO L93 Difference]: Finished difference Result 6081 states and 7996 transitions. [2023-04-03 02:36:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:36:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 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 73 [2023-04-03 02:36:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:31,942 INFO L225 Difference]: With dead ends: 6081 [2023-04-03 02:36:31,942 INFO L226 Difference]: Without dead ends: 6079 [2023-04-03 02:36:31,943 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 [2023-04-03 02:36:31,943 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1275 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:31,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 2720 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:36:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2023-04-03 02:36:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 3858. [2023-04-03 02:36:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3854 states have (on average 1.3092890503373118) internal successors, (5046), 3854 states have internal predecessors, (5046), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5049 transitions. [2023-04-03 02:36:33,586 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5049 transitions. Word has length 73 [2023-04-03 02:36:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:33,586 INFO L495 AbstractCegarLoop]: Abstraction has 3858 states and 5049 transitions. [2023-04-03 02:36:33,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5049 transitions. [2023-04-03 02:36:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:36:33,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:33,588 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] [2023-04-03 02:36:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:36:33,588 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:33,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 771206361, now seen corresponding path program 1 times [2023-04-03 02:36:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:33,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58765085] [2023-04-03 02:36:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:34,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58765085] [2023-04-03 02:36:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58765085] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:36:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372229490] [2023-04-03 02:36:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:34,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:36:34,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:36:34,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:36:34,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:36:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:34,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-03 02:36:34,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:36:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-03 02:36:35,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:36:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372229490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:35,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:36:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2023-04-03 02:36:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703000240] [2023-04-03 02:36:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:35,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:36:35,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:36:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:36:35,566 INFO L87 Difference]: Start difference. First operand 3858 states and 5049 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:39,047 INFO L93 Difference]: Finished difference Result 7240 states and 9534 transitions. [2023-04-03 02:36:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:36:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 73 [2023-04-03 02:36:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:39,055 INFO L225 Difference]: With dead ends: 7240 [2023-04-03 02:36:39,055 INFO L226 Difference]: Without dead ends: 5732 [2023-04-03 02:36:39,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:36:39,059 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1560 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:39,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1560 Valid, 2388 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:36:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2023-04-03 02:36:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 4081. [2023-04-03 02:36:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 4077 states have (on average 1.3100318861908267) internal successors, (5341), 4077 states have internal predecessors, (5341), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5344 transitions. [2023-04-03 02:36:40,940 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5344 transitions. Word has length 73 [2023-04-03 02:36:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:40,940 INFO L495 AbstractCegarLoop]: Abstraction has 4081 states and 5344 transitions. [2023-04-03 02:36:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5344 transitions. [2023-04-03 02:36:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:36:40,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:40,942 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] [2023-04-03 02:36:40,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:36:41,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-04-03 02:36:41,149 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-03 02:36:41,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash 33188505, now seen corresponding path program 1 times [2023-04-03 02:36:41,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440530868] [2023-04-03 02:36:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:41,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:41,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440530868] [2023-04-03 02:36:41,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440530868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:36:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249900474] [2023-04-03 02:36:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:36:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:36:41,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:36:41,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:36:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:42,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-03 02:36:42,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:36:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:43,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:36:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249900474] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:36:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757460991] [2023-04-03 02:36:46,394 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-03 02:36:46,394 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:36:46,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:36:46,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:36:46,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:36:48,671 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 404 for LOIs [2023-04-03 02:37:14,342 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:37:48,832 WARN L223 SmtUtils]: Spent 15.03s on a formula simplification. DAG size of input: 527 DAG size of output: 526 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:38:31,232 WARN L223 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 524 DAG size of output: 525 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:39:21,953 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 02:39:24,099 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6