/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/systemc/token_ring.09.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:25:51,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:25:51,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:25:51,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:25:51,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:25:51,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:25:51,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:25:51,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:25:51,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:25:51,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:25:51,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:25:51,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:25:51,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:25:51,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:25:51,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:25:51,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:25:51,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:25:51,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:25:51,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:25:51,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:25:51,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:25:51,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:25:51,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:25:51,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:25:51,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:25:51,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:25:51,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:25:51,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:25:51,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:25:51,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:25:51,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:25:51,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:25:51,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:25:51,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:25:51,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:25:51,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:25:51,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:25:51,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:25:51,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:25:51,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:25:51,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:25:51,930 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 01:25:51,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:25:51,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:25:51,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:25:51,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:25:51,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:25:51,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:25:51,954 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:25:51,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:25:51,954 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:25:51,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:25:51,955 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:25:51,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:25:51,955 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:25:51,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:25:51,955 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:25:51,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:25:51,956 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:25:51,956 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:25:51,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:25:51,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:25:51,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:25:51,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:25:51,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:25:51,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:25:51,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:25:51,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:25:51,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:25:51,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:25:51,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:25:51,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:25:52,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:25:52,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:25:52,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:25:52,179 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:25:52,180 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:25:52,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2023-04-03 01:25:53,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:25:53,389 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:25:53,389 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2023-04-03 01:25:53,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c6176fc/82f81936aa914334af56dc5ee867f24c/FLAGbdb45f0ed [2023-04-03 01:25:53,424 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c6176fc/82f81936aa914334af56dc5ee867f24c [2023-04-03 01:25:53,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:25:53,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:25:53,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:25:53,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:25:53,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:25:53,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f74ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53, skipping insertion in model container [2023-04-03 01:25:53,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:25:53,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:25:53,563 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/systemc/token_ring.09.cil-2.c[671,684] [2023-04-03 01:25:53,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:25:53,667 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:25:53,674 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/systemc/token_ring.09.cil-2.c[671,684] [2023-04-03 01:25:53,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:25:53,725 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:25:53,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53 WrapperNode [2023-04-03 01:25:53,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:25:53,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:25:53,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:25:53,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:25:53,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:25:53,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:25:53,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:25:53,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:25:53,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (1/1) ... [2023-04-03 01:25:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:25:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:53,821 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 01:25:53,822 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 01:25:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:25:53,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:25:53,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:25:53,856 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:25:53,856 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:25:53,857 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:25:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:25:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:25:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:25:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:25:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:25:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:25:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:25:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:25:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:25:53,961 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:25:53,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:25:54,545 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:25:54,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:25:54,770 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-04-03 01:25:54,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:25:54 BoogieIcfgContainer [2023-04-03 01:25:54,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:25:54,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:25:54,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:25:54,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:25:54,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:25:53" (1/3) ... [2023-04-03 01:25:54,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2846dc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:25:54, skipping insertion in model container [2023-04-03 01:25:54,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:25:53" (2/3) ... [2023-04-03 01:25:54,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2846dc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:25:54, skipping insertion in model container [2023-04-03 01:25:54,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:25:54" (3/3) ... [2023-04-03 01:25:54,780 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-2.c [2023-04-03 01:25:54,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:25:54,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:25:54,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:25:54,837 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;@7a7675c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:25:54,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:25:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 172 states have internal predecessors, (228), 54 states have call successors, (54), 36 states have call predecessors, (54), 36 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-04-03 01:25:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-03 01:25:54,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:54,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:54,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:54,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1186760580, now seen corresponding path program 1 times [2023-04-03 01:25:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:54,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12907452] [2023-04-03 01:25:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:54,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:55,471 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 01:25:55,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:55,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12907452] [2023-04-03 01:25:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12907452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:55,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:25:55,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:25:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183098592] [2023-04-03 01:25:55,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:55,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:25:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:25:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:25:55,525 INFO L87 Difference]: Start difference. First operand has 249 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 172 states have internal predecessors, (228), 54 states have call successors, (54), 36 states have call predecessors, (54), 36 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-03 01:25:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:56,061 INFO L93 Difference]: Finished difference Result 700 states and 1001 transitions. [2023-04-03 01:25:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:25:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 113 [2023-04-03 01:25:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:56,073 INFO L225 Difference]: With dead ends: 700 [2023-04-03 01:25:56,073 INFO L226 Difference]: Without dead ends: 455 [2023-04-03 01:25:56,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:25:56,079 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 583 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:56,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 837 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:25:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-04-03 01:25:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 454. [2023-04-03 01:25:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.41156462585034) internal successors, (415), 318 states have internal predecessors, (415), 97 states have call successors, (97), 66 states have call predecessors, (97), 62 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2023-04-03 01:25:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 606 transitions. [2023-04-03 01:25:56,155 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 606 transitions. Word has length 113 [2023-04-03 01:25:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:56,156 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 606 transitions. [2023-04-03 01:25:56,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-03 01:25:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 606 transitions. [2023-04-03 01:25:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-04-03 01:25:56,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:56,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:25:56,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:56,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2018488056, now seen corresponding path program 1 times [2023-04-03 01:25:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:56,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755363536] [2023-04-03 01:25:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-03 01:25:56,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755363536] [2023-04-03 01:25:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755363536] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542927309] [2023-04-03 01:25:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:56,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:56,628 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 01:25:56,654 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 01:25:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:56,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:25:57,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:25:57,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:25:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542927309] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:57,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:25:57,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:25:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284731042] [2023-04-03 01:25:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:57,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:25:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:25:57,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:57,084 INFO L87 Difference]: Start difference. First operand 454 states and 606 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-03 01:25:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:57,201 INFO L93 Difference]: Finished difference Result 779 states and 1068 transitions. [2023-04-03 01:25:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:25:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 213 [2023-04-03 01:25:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:57,206 INFO L225 Difference]: With dead ends: 779 [2023-04-03 01:25:57,206 INFO L226 Difference]: Without dead ends: 554 [2023-04-03 01:25:57,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:57,207 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 122 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:57,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 683 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:25:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-03 01:25:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 524. [2023-04-03 01:25:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 344 states have (on average 1.4593023255813953) internal successors, (502), 377 states have internal predecessors, (502), 107 states have call successors, (107), 76 states have call predecessors, (107), 72 states have return successors, (113), 101 states have call predecessors, (113), 103 states have call successors, (113) [2023-04-03 01:25:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 722 transitions. [2023-04-03 01:25:57,247 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 722 transitions. Word has length 213 [2023-04-03 01:25:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:57,248 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 722 transitions. [2023-04-03 01:25:57,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-03 01:25:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 722 transitions. [2023-04-03 01:25:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:25:57,253 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:57,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:57,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:25:57,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:57,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:57,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1559522618, now seen corresponding path program 1 times [2023-04-03 01:25:57,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:57,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691631998] [2023-04-03 01:25:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-04-03 01:25:57,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691631998] [2023-04-03 01:25:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691631998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444610458] [2023-04-03 01:25:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:57,848 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 01:25:57,868 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 01:25:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:58,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 2169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:25:58,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:25:58,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:25:58,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444610458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:58,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:25:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:25:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461769488] [2023-04-03 01:25:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:25:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:25:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:58,255 INFO L87 Difference]: Start difference. First operand 524 states and 722 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:25:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:58,440 INFO L93 Difference]: Finished difference Result 1529 states and 2237 transitions. [2023-04-03 01:25:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:25:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:25:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:58,446 INFO L225 Difference]: With dead ends: 1529 [2023-04-03 01:25:58,446 INFO L226 Difference]: Without dead ends: 1022 [2023-04-03 01:25:58,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:58,448 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:58,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 721 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:25:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2023-04-03 01:25:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1013. [2023-04-03 01:25:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 673 states have (on average 1.4546805349182763) internal successors, (979), 734 states have internal predecessors, (979), 201 states have call successors, (201), 145 states have call predecessors, (201), 138 states have return successors, (272), 192 states have call predecessors, (272), 197 states have call successors, (272) [2023-04-03 01:25:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1452 transitions. [2023-04-03 01:25:58,525 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1452 transitions. Word has length 296 [2023-04-03 01:25:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:58,526 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1452 transitions. [2023-04-03 01:25:58,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:25:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1452 transitions. [2023-04-03 01:25:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:25:58,532 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:58,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:58,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:25:58,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:25:58,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:58,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1321052280, now seen corresponding path program 1 times [2023-04-03 01:25:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112622503] [2023-04-03 01:25:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-03 01:25:59,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112622503] [2023-04-03 01:25:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112622503] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643485657] [2023-04-03 01:25:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:59,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:59,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:25:59,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:25:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:59,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:25:59,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-03 01:25:59,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:25:59,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643485657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:59,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:25:59,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:25:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376745866] [2023-04-03 01:25:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:59,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:25:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:25:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:59,583 INFO L87 Difference]: Start difference. First operand 1013 states and 1452 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:25:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:59,745 INFO L93 Difference]: Finished difference Result 2987 states and 4460 transitions. [2023-04-03 01:25:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:25:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) Word has length 296 [2023-04-03 01:25:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:59,756 INFO L225 Difference]: With dead ends: 2987 [2023-04-03 01:25:59,757 INFO L226 Difference]: Without dead ends: 1990 [2023-04-03 01:25:59,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:25:59,763 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 242 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:59,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 576 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:25:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2023-04-03 01:25:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1980. [2023-04-03 01:25:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1326 states have (on average 1.4509803921568627) internal successors, (1924), 1440 states have internal predecessors, (1924), 386 states have call successors, (386), 284 states have call predecessors, (386), 267 states have return successors, (533), 365 states have call predecessors, (533), 382 states have call successors, (533) [2023-04-03 01:25:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2843 transitions. [2023-04-03 01:25:59,902 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2843 transitions. Word has length 296 [2023-04-03 01:25:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:59,902 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2843 transitions. [2023-04-03 01:25:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:25:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2843 transitions. [2023-04-03 01:25:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:25:59,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:59,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:59,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:00,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:00,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:00,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash -521454012, now seen corresponding path program 1 times [2023-04-03 01:26:00,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:00,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619272772] [2023-04-03 01:26:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:00,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-03 01:26:00,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:00,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619272772] [2023-04-03 01:26:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619272772] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76694437] [2023-04-03 01:26:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:00,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:00,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:00,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:00,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:26:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:00,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:26:00,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-03 01:26:00,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76694437] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:00,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:00,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:26:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126326812] [2023-04-03 01:26:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:00,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:00,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:00,876 INFO L87 Difference]: Start difference. First operand 1980 states and 2843 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:26:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:01,094 INFO L93 Difference]: Finished difference Result 5870 states and 8782 transitions. [2023-04-03 01:26:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:01,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) Word has length 296 [2023-04-03 01:26:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:01,113 INFO L225 Difference]: With dead ends: 5870 [2023-04-03 01:26:01,113 INFO L226 Difference]: Without dead ends: 3906 [2023-04-03 01:26:01,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:01,123 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 270 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:01,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 555 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2023-04-03 01:26:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3890. [2023-04-03 01:26:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 2618 states have (on average 1.4461420932009168) internal successors, (3786), 2832 states have internal predecessors, (3786), 752 states have call successors, (752), 562 states have call predecessors, (752), 519 states have return successors, (1062), 701 states have call predecessors, (1062), 748 states have call successors, (1062) [2023-04-03 01:26:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 5600 transitions. [2023-04-03 01:26:01,311 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 5600 transitions. Word has length 296 [2023-04-03 01:26:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:01,311 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 5600 transitions. [2023-04-03 01:26:01,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:26:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 5600 transitions. [2023-04-03 01:26:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:01,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:01,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:01,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-03 01:26:01,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:01,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:01,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1750509374, now seen corresponding path program 1 times [2023-04-03 01:26:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971588766] [2023-04-03 01:26:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-04-03 01:26:01,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971588766] [2023-04-03 01:26:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971588766] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30546124] [2023-04-03 01:26:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:01,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:26:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:02,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2157 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-03 01:26:02,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-03 01:26:02,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30546124] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:02,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:02,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:26:02,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502791743] [2023-04-03 01:26:02,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:02,432 INFO L87 Difference]: Start difference. First operand 3890 states and 5600 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:26:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:02,680 INFO L93 Difference]: Finished difference Result 5850 states and 8324 transitions. [2023-04-03 01:26:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) Word has length 296 [2023-04-03 01:26:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:02,695 INFO L225 Difference]: With dead ends: 5850 [2023-04-03 01:26:02,696 INFO L226 Difference]: Without dead ends: 3901 [2023-04-03 01:26:02,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:02,705 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 202 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:02,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 520 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2023-04-03 01:26:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 3889. [2023-04-03 01:26:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 2618 states have (on average 1.4385026737967914) internal successors, (3766), 2832 states have internal predecessors, (3766), 751 states have call successors, (751), 562 states have call predecessors, (751), 519 states have return successors, (868), 699 states have call predecessors, (868), 747 states have call successors, (868) [2023-04-03 01:26:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 5385 transitions. [2023-04-03 01:26:02,903 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 5385 transitions. Word has length 296 [2023-04-03 01:26:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:02,903 INFO L495 AbstractCegarLoop]: Abstraction has 3889 states and 5385 transitions. [2023-04-03 01:26:02,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:26:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 5385 transitions. [2023-04-03 01:26:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:02,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:02,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:02,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:03,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:03,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:03,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1961094381, now seen corresponding path program 1 times [2023-04-03 01:26:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:03,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655216837] [2023-04-03 01:26:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-03 01:26:03,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655216837] [2023-04-03 01:26:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655216837] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390181468] [2023-04-03 01:26:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:03,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:03,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:03,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:26:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:04,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:26:04,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:04,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390181468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:04,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:04,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:04,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360039461] [2023-04-03 01:26:04,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:04,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:04,237 INFO L87 Difference]: Start difference. First operand 3889 states and 5385 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:04,540 INFO L93 Difference]: Finished difference Result 11554 states and 17039 transitions. [2023-04-03 01:26:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:26:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:04,583 INFO L225 Difference]: With dead ends: 11554 [2023-04-03 01:26:04,583 INFO L226 Difference]: Without dead ends: 7682 [2023-04-03 01:26:04,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:04,611 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 257 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:04,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 744 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7682 states. [2023-04-03 01:26:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 7638. [2023-04-03 01:26:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7638 states, 5158 states have (on average 1.4296238852268321) internal successors, (7374), 5560 states have internal predecessors, (7374), 1468 states have call successors, (1468), 1110 states have call predecessors, (1468), 1011 states have return successors, (2132), 1353 states have call predecessors, (2132), 1464 states have call successors, (2132) [2023-04-03 01:26:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7638 states to 7638 states and 10974 transitions. [2023-04-03 01:26:05,008 INFO L78 Accepts]: Start accepts. Automaton has 7638 states and 10974 transitions. Word has length 296 [2023-04-03 01:26:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:05,008 INFO L495 AbstractCegarLoop]: Abstraction has 7638 states and 10974 transitions. [2023-04-03 01:26:05,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7638 states and 10974 transitions. [2023-04-03 01:26:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:05,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:05,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:05,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:05,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:05,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:05,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -705222642, now seen corresponding path program 1 times [2023-04-03 01:26:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426430926] [2023-04-03 01:26:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-03 01:26:06,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426430926] [2023-04-03 01:26:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426430926] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731570292] [2023-04-03 01:26:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:06,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:06,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:06,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:06,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:26:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:06,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:26:06,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 143 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:06,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:26:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-03 01:26:06,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731570292] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:06,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:26:06,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-03 01:26:06,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274559743] [2023-04-03 01:26:06,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:26:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:26:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:06,881 INFO L87 Difference]: Start difference. First operand 7638 states and 10974 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:07,773 INFO L93 Difference]: Finished difference Result 13110 states and 19444 transitions. [2023-04-03 01:26:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 01:26:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 296 [2023-04-03 01:26:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:07,823 INFO L225 Difference]: With dead ends: 13110 [2023-04-03 01:26:07,823 INFO L226 Difference]: Without dead ends: 9277 [2023-04-03 01:26:07,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 597 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:07,844 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 774 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:07,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 632 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:26:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9277 states. [2023-04-03 01:26:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9277 to 8885. [2023-04-03 01:26:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8885 states, 5990 states have (on average 1.472787979966611) internal successors, (8822), 6776 states have internal predecessors, (8822), 1779 states have call successors, (1779), 1110 states have call predecessors, (1779), 1115 states have return successors, (2317), 1615 states have call predecessors, (2317), 1775 states have call successors, (2317) [2023-04-03 01:26:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8885 states to 8885 states and 12918 transitions. [2023-04-03 01:26:08,342 INFO L78 Accepts]: Start accepts. Automaton has 8885 states and 12918 transitions. Word has length 296 [2023-04-03 01:26:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:08,342 INFO L495 AbstractCegarLoop]: Abstraction has 8885 states and 12918 transitions. [2023-04-03 01:26:08,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 8885 states and 12918 transitions. [2023-04-03 01:26:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:08,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:08,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:08,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:08,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:08,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1816272679, now seen corresponding path program 1 times [2023-04-03 01:26:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054887115] [2023-04-03 01:26:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-03 01:26:09,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054887115] [2023-04-03 01:26:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054887115] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343376083] [2023-04-03 01:26:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:09,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:09,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:09,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:26:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:09,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:26:09,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:09,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343376083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:09,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:09,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347376344] [2023-04-03 01:26:09,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:09,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:09,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:09,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:09,590 INFO L87 Difference]: Start difference. First operand 8885 states and 12918 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:10,349 INFO L93 Difference]: Finished difference Result 26438 states and 41237 transitions. [2023-04-03 01:26:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:26:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:10,447 INFO L225 Difference]: With dead ends: 26438 [2023-04-03 01:26:10,447 INFO L226 Difference]: Without dead ends: 17570 [2023-04-03 01:26:10,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:10,515 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 269 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:10,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 751 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17570 states. [2023-04-03 01:26:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17570 to 17478. [2023-04-03 01:26:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17478 states, 11822 states have (on average 1.465572661140247) internal successors, (17326), 13320 states have internal predecessors, (17326), 3484 states have call successors, (3484), 2198 states have call predecessors, (3484), 2171 states have return successors, (5643), 3113 states have call predecessors, (5643), 3480 states have call successors, (5643) [2023-04-03 01:26:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17478 states to 17478 states and 26453 transitions. [2023-04-03 01:26:11,438 INFO L78 Accepts]: Start accepts. Automaton has 17478 states and 26453 transitions. Word has length 296 [2023-04-03 01:26:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:11,440 INFO L495 AbstractCegarLoop]: Abstraction has 17478 states and 26453 transitions. [2023-04-03 01:26:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 17478 states and 26453 transitions. [2023-04-03 01:26:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:11,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:11,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:11,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 01:26:11,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:11,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -85935622, now seen corresponding path program 1 times [2023-04-03 01:26:11,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:11,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099803069] [2023-04-03 01:26:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-03 01:26:12,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099803069] [2023-04-03 01:26:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099803069] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218399355] [2023-04-03 01:26:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:12,278 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:12,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-03 01:26:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:12,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:26:12,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 143 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:12,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:26:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-03 01:26:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218399355] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:26:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-03 01:26:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265435865] [2023-04-03 01:26:13,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:26:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:26:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:13,049 INFO L87 Difference]: Start difference. First operand 17478 states and 26453 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:14,590 INFO L93 Difference]: Finished difference Result 30698 states and 48147 transitions. [2023-04-03 01:26:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 01:26:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 296 [2023-04-03 01:26:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:14,710 INFO L225 Difference]: With dead ends: 30698 [2023-04-03 01:26:14,711 INFO L226 Difference]: Without dead ends: 21941 [2023-04-03 01:26:14,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 597 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:14,760 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 790 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:14,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 669 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:26:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21941 states. [2023-04-03 01:26:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21941 to 20869. [2023-04-03 01:26:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20869 states, 14158 states have (on average 1.5221076423223618) internal successors, (21550), 16616 states have internal predecessors, (21550), 4387 states have call successors, (4387), 2198 states have call predecessors, (4387), 2323 states have return successors, (6127), 3855 states have call predecessors, (6127), 4383 states have call successors, (6127) [2023-04-03 01:26:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20869 states to 20869 states and 32064 transitions. [2023-04-03 01:26:16,289 INFO L78 Accepts]: Start accepts. Automaton has 20869 states and 32064 transitions. Word has length 296 [2023-04-03 01:26:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:16,290 INFO L495 AbstractCegarLoop]: Abstraction has 20869 states and 32064 transitions. [2023-04-03 01:26:16,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 20869 states and 32064 transitions. [2023-04-03 01:26:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:16,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:16,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:16,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:16,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 01:26:16,533 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:16,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1761589161, now seen corresponding path program 1 times [2023-04-03 01:26:16,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:16,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647415052] [2023-04-03 01:26:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:16,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-03 01:26:17,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647415052] [2023-04-03 01:26:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647415052] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054339728] [2023-04-03 01:26:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:17,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:17,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-03 01:26:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:17,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:26:17,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:17,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:17,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054339728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:17,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481278953] [2023-04-03 01:26:17,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:17,407 INFO L87 Difference]: Start difference. First operand 20869 states and 32064 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:19,389 INFO L93 Difference]: Finished difference Result 62182 states and 103129 transitions. [2023-04-03 01:26:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:26:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:19,621 INFO L225 Difference]: With dead ends: 62182 [2023-04-03 01:26:19,621 INFO L226 Difference]: Without dead ends: 41330 [2023-04-03 01:26:19,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:19,947 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 275 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:19,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 752 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41330 states. [2023-04-03 01:26:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41330 to 41110. [2023-04-03 01:26:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41110 states, 27998 states have (on average 1.516608329166369) internal successors, (42462), 32712 states have internal predecessors, (42462), 8588 states have call successors, (8588), 4358 states have call predecessors, (8588), 4523 states have return successors, (14865), 7385 states have call predecessors, (14865), 8584 states have call successors, (14865) [2023-04-03 01:26:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41110 states to 41110 states and 65915 transitions. [2023-04-03 01:26:22,686 INFO L78 Accepts]: Start accepts. Automaton has 41110 states and 65915 transitions. Word has length 296 [2023-04-03 01:26:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:22,687 INFO L495 AbstractCegarLoop]: Abstraction has 41110 states and 65915 transitions. [2023-04-03 01:26:22,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41110 states and 65915 transitions. [2023-04-03 01:26:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:22,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:22,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:22,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 01:26:22,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:22,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1843424491, now seen corresponding path program 1 times [2023-04-03 01:26:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:22,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186636162] [2023-04-03 01:26:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 60 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-04-03 01:26:23,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186636162] [2023-04-03 01:26:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186636162] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090146443] [2023-04-03 01:26:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:23,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:23,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-03 01:26:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:23,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 2157 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-03 01:26:23,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-03 01:26:23,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:23,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090146443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:23,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:23,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:26:23,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884039481] [2023-04-03 01:26:23,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:23,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:23,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:23,793 INFO L87 Difference]: Start difference. First operand 41110 states and 65915 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:26:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:25,819 INFO L93 Difference]: Finished difference Result 61718 states and 98034 transitions. [2023-04-03 01:26:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) Word has length 296 [2023-04-03 01:26:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:26,036 INFO L225 Difference]: With dead ends: 61718 [2023-04-03 01:26:26,037 INFO L226 Difference]: Without dead ends: 41153 [2023-04-03 01:26:26,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:26:26,159 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 202 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:26,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 520 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41153 states. [2023-04-03 01:26:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41153 to 41109. [2023-04-03 01:26:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41109 states, 27998 states have (on average 1.5108936352596614) internal successors, (42302), 32712 states have internal predecessors, (42302), 8587 states have call successors, (8587), 4358 states have call predecessors, (8587), 4523 states have return successors, (12583), 7383 states have call predecessors, (12583), 8583 states have call successors, (12583) [2023-04-03 01:26:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41109 states to 41109 states and 63472 transitions. [2023-04-03 01:26:28,658 INFO L78 Accepts]: Start accepts. Automaton has 41109 states and 63472 transitions. Word has length 296 [2023-04-03 01:26:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:28,659 INFO L495 AbstractCegarLoop]: Abstraction has 41109 states and 63472 transitions. [2023-04-03 01:26:28,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:26:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 41109 states and 63472 transitions. [2023-04-03 01:26:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:28,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:28,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 01:26:28,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:28,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 132265795, now seen corresponding path program 1 times [2023-04-03 01:26:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879233731] [2023-04-03 01:26:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-03 01:26:29,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:29,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879233731] [2023-04-03 01:26:29,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879233731] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:29,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275816692] [2023-04-03 01:26:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:29,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:29,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:29,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-03 01:26:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:29,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:26:29,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:29,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:29,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275816692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:29,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:29,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716504934] [2023-04-03 01:26:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:29,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:29,990 INFO L87 Difference]: Start difference. First operand 41109 states and 63472 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:34,439 INFO L93 Difference]: Finished difference Result 122510 states and 206057 transitions. [2023-04-03 01:26:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:26:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:35,113 INFO L225 Difference]: With dead ends: 122510 [2023-04-03 01:26:35,113 INFO L226 Difference]: Without dead ends: 81418 [2023-04-03 01:26:35,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:35,413 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 284 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:35,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 748 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81418 states. [2023-04-03 01:26:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81418 to 80982. [2023-04-03 01:26:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80982 states, 55366 states have (on average 1.5051475634866163) internal successors, (83334), 64392 states have internal predecessors, (83334), 16812 states have call successors, (16812), 8646 states have call predecessors, (16812), 8803 states have return successors, (30825), 14121 states have call predecessors, (30825), 16808 states have call successors, (30825) [2023-04-03 01:26:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80982 states to 80982 states and 130971 transitions. [2023-04-03 01:26:40,579 INFO L78 Accepts]: Start accepts. Automaton has 80982 states and 130971 transitions. Word has length 296 [2023-04-03 01:26:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:40,579 INFO L495 AbstractCegarLoop]: Abstraction has 80982 states and 130971 transitions. [2023-04-03 01:26:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:26:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 80982 states and 130971 transitions. [2023-04-03 01:26:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:40,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:40,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:40,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:41,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-03 01:26:41,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:41,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1310240356, now seen corresponding path program 1 times [2023-04-03 01:26:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207228702] [2023-04-03 01:26:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-03 01:26:41,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207228702] [2023-04-03 01:26:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207228702] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106984720] [2023-04-03 01:26:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:41,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:41,763 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:41,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-03 01:26:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:42,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:26:42,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 143 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:42,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:26:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-03 01:26:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106984720] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:42,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:26:42,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-03 01:26:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564881981] [2023-04-03 01:26:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:42,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:26:42,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:26:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:42,500 INFO L87 Difference]: Start difference. First operand 80982 states and 130971 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:48,915 INFO L93 Difference]: Finished difference Result 147022 states and 245529 transitions. [2023-04-03 01:26:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 01:26:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 296 [2023-04-03 01:26:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:49,523 INFO L225 Difference]: With dead ends: 147022 [2023-04-03 01:26:49,523 INFO L226 Difference]: Without dead ends: 106505 [2023-04-03 01:26:49,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 597 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:26:49,794 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 617 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:49,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 720 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:26:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106505 states. [2023-04-03 01:26:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106505 to 100437. [2023-04-03 01:26:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100437 states, 69102 states have (on average 1.5709820265694192) internal successors, (108558), 83272 states have internal predecessors, (108558), 21899 states have call successors, (21899), 8646 states have call predecessors, (21899), 9435 states have return successors, (33611), 18007 states have call predecessors, (33611), 21895 states have call successors, (33611) [2023-04-03 01:26:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100437 states to 100437 states and 164068 transitions. [2023-04-03 01:26:56,632 INFO L78 Accepts]: Start accepts. Automaton has 100437 states and 164068 transitions. Word has length 296 [2023-04-03 01:26:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:56,633 INFO L495 AbstractCegarLoop]: Abstraction has 100437 states and 164068 transitions. [2023-04-03 01:26:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-03 01:26:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 100437 states and 164068 transitions. [2023-04-03 01:26:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-04-03 01:26:56,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:56,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:56,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-03 01:26:56,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:56,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1738357873, now seen corresponding path program 1 times [2023-04-03 01:26:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487251268] [2023-04-03 01:26:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-03 01:26:57,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:57,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487251268] [2023-04-03 01:26:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487251268] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:57,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032849071] [2023-04-03 01:26:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:57,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:57,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:57,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:57,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-03 01:26:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:57,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:26:57,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:26:57,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032849071] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:57,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:57,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:57,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445899590] [2023-04-03 01:26:57,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:57,860 INFO L87 Difference]: Start difference. First operand 100437 states and 164068 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:27:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:11,442 INFO L93 Difference]: Finished difference Result 299662 states and 536465 transitions. [2023-04-03 01:27:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:11,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 296 [2023-04-03 01:27:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:12,929 INFO L225 Difference]: With dead ends: 299662 [2023-04-03 01:27:12,929 INFO L226 Difference]: Without dead ends: 199242 [2023-04-03 01:27:14,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:27:14,179 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 295 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:14,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 765 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199242 states.