/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 IntervalDomain -i ../sv-benchmarks/c/systemc/token_ring.10.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:06:55,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:06:55,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:06:55,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:06:55,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:06:55,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:06:55,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:06:55,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:06:55,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:06:55,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:06:55,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:06:55,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:06:55,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:06:55,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:06:55,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:06:55,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:06:55,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:06:55,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:06:55,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:06:55,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:06:55,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:06:55,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:06:55,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:06:55,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:06:55,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:06:55,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:06:55,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:06:55,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:06:55,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:06:55,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:06:55,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:06:55,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:06:55,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:06:55,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:06:55,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:06:55,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:06:55,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:06:55,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:06:55,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:06:55,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:06:55,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:06:55,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:06:55,951 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:06:55,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:06:55,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:06:55,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:06:55,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:06:55,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:06:55,953 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:06:55,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:06:55,953 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:06:55,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:06:55,954 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:06:55,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:06:55,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:06:55,954 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:06:55,955 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:06:55,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:06:55,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:06:55,955 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:06:55,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:06:55,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:06:55,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:06:55,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:06:55,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:06:55,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:06:55,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:06:55,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:06:55,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:06:55,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:06:55,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:06:55,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:06:56,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:06:56,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:06:56,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:06:56,244 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:06:56,245 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:06:56,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2023-04-01 00:06:57,626 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:06:57,957 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:06:57,958 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2023-04-01 00:06:57,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d49d90238/2e3f1345c02846d9b72a09c2fba69a45/FLAG1445fea82 [2023-04-01 00:06:57,998 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d49d90238/2e3f1345c02846d9b72a09c2fba69a45 [2023-04-01 00:06:58,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:06:58,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:06:58,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:06:58,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:06:58,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:06:58,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a8ea68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58, skipping insertion in model container [2023-04-01 00:06:58,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:06:58,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:06:58,173 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.10.cil-2.c[671,684] [2023-04-01 00:06:58,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:06:58,284 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:06:58,294 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.10.cil-2.c[671,684] [2023-04-01 00:06:58,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:06:58,388 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:06:58,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58 WrapperNode [2023-04-01 00:06:58,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:06:58,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:06:58,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:06:58,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:06:58,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,504 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:06:58,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:06:58,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:06:58,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:06:58,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 00:06:58,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:06:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:06:58,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:06:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:06:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:06:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:06:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-01 00:06:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-01 00:06:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 00:06:58,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 00:06:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 00:06:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 00:06:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-01 00:06:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 00:06:58,632 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:06:58,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:06:58,733 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:06:58,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:06:59,638 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:07:00,043 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:07:00,044 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-04-01 00:07:00,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:07:00 BoogieIcfgContainer [2023-04-01 00:07:00,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:07:00,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:07:00,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:07:00,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:07:00,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:06:58" (1/3) ... [2023-04-01 00:07:00,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fd9345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:07:00, skipping insertion in model container [2023-04-01 00:07:00,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (2/3) ... [2023-04-01 00:07:00,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fd9345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:07:00, skipping insertion in model container [2023-04-01 00:07:00,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:07:00" (3/3) ... [2023-04-01 00:07:00,060 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.10.cil-2.c [2023-04-01 00:07:00,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:07:00,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:07:00,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:07:00,136 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;@10cca188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:07:00,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:07:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 180 states have internal predecessors, (239), 56 states have call successors, (56), 38 states have call predecessors, (56), 38 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-04-01 00:07:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 00:07:00,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:00,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:07:00,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:00,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1291615912, now seen corresponding path program 1 times [2023-04-01 00:07:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:00,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088807637] [2023-04-01 00:07:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:00,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088807637] [2023-04-01 00:07:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088807637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:00,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:07:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424980229] [2023-04-01 00:07:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:07:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:07:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:07:01,027 INFO L87 Difference]: Start difference. First operand has 261 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 180 states have internal predecessors, (239), 56 states have call successors, (56), 38 states have call predecessors, (56), 38 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 00:07:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:01,807 INFO L93 Difference]: Finished difference Result 740 states and 1058 transitions. [2023-04-01 00:07:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:07:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2023-04-01 00:07:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:01,830 INFO L225 Difference]: With dead ends: 740 [2023-04-01 00:07:01,831 INFO L226 Difference]: Without dead ends: 483 [2023-04-01 00:07:01,840 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 [2023-04-01 00:07:01,844 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 620 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:01,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 890 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 00:07:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-04-01 00:07:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 482. [2023-04-01 00:07:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 313 states have (on average 1.415335463258786) internal successors, (443), 338 states have internal predecessors, (443), 102 states have call successors, (102), 70 states have call predecessors, (102), 66 states have return successors, (100), 97 states have call predecessors, (100), 99 states have call successors, (100) [2023-04-01 00:07:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 645 transitions. [2023-04-01 00:07:01,927 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 645 transitions. Word has length 119 [2023-04-01 00:07:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:01,928 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 645 transitions. [2023-04-01 00:07:01,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 00:07:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 645 transitions. [2023-04-01 00:07:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-04-01 00:07:01,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:01,935 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, 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] [2023-04-01 00:07:01,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:07:01,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:01,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash 298576287, now seen corresponding path program 1 times [2023-04-01 00:07:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:01,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864109036] [2023-04-01 00:07:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:01,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 00:07:02,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864109036] [2023-04-01 00:07:02,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864109036] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257357918] [2023-04-01 00:07:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:02,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:07:02,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:07:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:03,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 00:07:03,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 00:07:03,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257357918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:03,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483223468] [2023-04-01 00:07:03,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:03,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:03,214 INFO L87 Difference]: Start difference. First operand 482 states and 645 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 00:07:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:03,397 INFO L93 Difference]: Finished difference Result 827 states and 1137 transitions. [2023-04-01 00:07:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 226 [2023-04-01 00:07:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:03,402 INFO L225 Difference]: With dead ends: 827 [2023-04-01 00:07:03,402 INFO L226 Difference]: Without dead ends: 590 [2023-04-01 00:07:03,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:03,405 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 133 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:03,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 722 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-04-01 00:07:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 559. [2023-04-01 00:07:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 368 states have (on average 1.4646739130434783) internal successors, (539), 403 states have internal predecessors, (539), 113 states have call successors, (113), 81 states have call predecessors, (113), 77 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2023-04-01 00:07:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 773 transitions. [2023-04-01 00:07:03,447 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 773 transitions. Word has length 226 [2023-04-01 00:07:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 773 transitions. [2023-04-01 00:07:03,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 00:07:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 773 transitions. [2023-04-01 00:07:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:03,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:03,455 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:03,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:03,684 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 [2023-04-01 00:07:03,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:03,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1608556496, now seen corresponding path program 1 times [2023-04-01 00:07:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:03,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868354496] [2023-04-01 00:07:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:04,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:04,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868354496] [2023-04-01 00:07:04,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868354496] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:04,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106781224] [2023-04-01 00:07:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:04,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:04,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:04,408 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) [2023-04-01 00:07:04,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 00:07:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:04,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:04,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-01 00:07:04,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106781224] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:04,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692357259] [2023-04-01 00:07:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:04,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:04,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:04,969 INFO L87 Difference]: Start difference. First operand 559 states and 773 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-01 00:07:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:05,136 INFO L93 Difference]: Finished difference Result 1635 states and 2335 transitions. [2023-04-01 00:07:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) Word has length 316 [2023-04-01 00:07:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:05,144 INFO L225 Difference]: With dead ends: 1635 [2023-04-01 00:07:05,144 INFO L226 Difference]: Without dead ends: 1092 [2023-04-01 00:07:05,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:05,149 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 258 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:05,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 605 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2023-04-01 00:07:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1086. [2023-04-01 00:07:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 723 states have (on average 1.4633471645919778) internal successors, (1058), 789 states have internal predecessors, (1058), 214 states have call successors, (214), 156 states have call predecessors, (214), 148 states have return successors, (235), 204 states have call predecessors, (235), 211 states have call successors, (235) [2023-04-01 00:07:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1507 transitions. [2023-04-01 00:07:05,219 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1507 transitions. Word has length 316 [2023-04-01 00:07:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:05,220 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 1507 transitions. [2023-04-01 00:07:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-01 00:07:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1507 transitions. [2023-04-01 00:07:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:05,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:05,228 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:05,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 00:07:05,439 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 [2023-04-01 00:07:05,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:05,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -561314771, now seen corresponding path program 1 times [2023-04-01 00:07:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:05,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185787188] [2023-04-01 00:07:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:05,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185787188] [2023-04-01 00:07:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185787188] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132389885] [2023-04-01 00:07:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:05,978 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) [2023-04-01 00:07:06,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 00:07:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:06,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 2378 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:06,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-04-01 00:07:06,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132389885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:06,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824277719] [2023-04-01 00:07:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:06,554 INFO L87 Difference]: Start difference. First operand 1086 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 00:07:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:06,785 INFO L93 Difference]: Finished difference Result 3207 states and 4593 transitions. [2023-04-01 00:07:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 316 [2023-04-01 00:07:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:06,818 INFO L225 Difference]: With dead ends: 3207 [2023-04-01 00:07:06,819 INFO L226 Difference]: Without dead ends: 2137 [2023-04-01 00:07:06,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:06,827 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 279 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:06,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 603 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2023-04-01 00:07:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2128. [2023-04-01 00:07:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1426 states have (on average 1.4600280504908836) internal successors, (2082), 1551 states have internal predecessors, (2082), 414 states have call successors, (414), 306 states have call predecessors, (414), 287 states have return successors, (466), 391 states have call predecessors, (466), 411 states have call successors, (466) [2023-04-01 00:07:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2962 transitions. [2023-04-01 00:07:06,995 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2962 transitions. Word has length 316 [2023-04-01 00:07:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 2962 transitions. [2023-04-01 00:07:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 00:07:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2962 transitions. [2023-04-01 00:07:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:07,008 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:07,008 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:07,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:07,222 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 [2023-04-01 00:07:07,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:07,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash 698084336, now seen corresponding path program 1 times [2023-04-01 00:07:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:07,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464451953] [2023-04-01 00:07:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:07,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464451953] [2023-04-01 00:07:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464451953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030499722] [2023-04-01 00:07:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:07,757 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) [2023-04-01 00:07:07,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 00:07:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:08,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 2369 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:08,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-01 00:07:08,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:08,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030499722] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:08,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:08,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:08,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208615146] [2023-04-01 00:07:08,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:08,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:08,398 INFO L87 Difference]: Start difference. First operand 2128 states and 2962 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 00:07:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:08,764 INFO L93 Difference]: Finished difference Result 6315 states and 9077 transitions. [2023-04-01 00:07:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) Word has length 316 [2023-04-01 00:07:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:08,798 INFO L225 Difference]: With dead ends: 6315 [2023-04-01 00:07:08,798 INFO L226 Difference]: Without dead ends: 4203 [2023-04-01 00:07:08,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:08,817 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 237 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:08,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 546 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2023-04-01 00:07:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4188. [2023-04-01 00:07:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 2818 states have (on average 1.4556422995031937) internal successors, (4102), 3055 states have internal predecessors, (4102), 810 states have call successors, (810), 606 states have call predecessors, (810), 559 states have return successors, (940), 755 states have call predecessors, (940), 807 states have call successors, (940) [2023-04-01 00:07:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 5852 transitions. [2023-04-01 00:07:09,114 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 5852 transitions. Word has length 316 [2023-04-01 00:07:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:09,116 INFO L495 AbstractCegarLoop]: Abstraction has 4188 states and 5852 transitions. [2023-04-01 00:07:09,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 00:07:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 5852 transitions. [2023-04-01 00:07:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:09,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:09,136 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:09,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:09,347 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 [2023-04-01 00:07:09,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:09,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1212554029, now seen corresponding path program 1 times [2023-04-01 00:07:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274881472] [2023-04-01 00:07:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:09,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274881472] [2023-04-01 00:07:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274881472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503663466] [2023-04-01 00:07:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:09,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:09,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:09,911 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) [2023-04-01 00:07:09,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 00:07:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:10,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:10,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 00:07:10,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:10,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503663466] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:10,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634733167] [2023-04-01 00:07:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:10,500 INFO L87 Difference]: Start difference. First operand 4188 states and 5852 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-01 00:07:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:11,067 INFO L93 Difference]: Finished difference Result 12459 states and 18011 transitions. [2023-04-01 00:07:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) Word has length 316 [2023-04-01 00:07:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:11,133 INFO L225 Difference]: With dead ends: 12459 [2023-04-01 00:07:11,133 INFO L226 Difference]: Without dead ends: 8287 [2023-04-01 00:07:11,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:11,169 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 244 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:11,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 546 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2023-04-01 00:07:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 8260. [2023-04-01 00:07:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8260 states, 5574 states have (on average 1.450663796196627) internal successors, (8086), 6023 states have internal predecessors, (8086), 1594 states have call successors, (1594), 1206 states have call predecessors, (1594), 1091 states have return successors, (1930), 1463 states have call predecessors, (1930), 1591 states have call successors, (1930) [2023-04-01 00:07:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8260 states to 8260 states and 11610 transitions. [2023-04-01 00:07:11,726 INFO L78 Accepts]: Start accepts. Automaton has 8260 states and 11610 transitions. Word has length 316 [2023-04-01 00:07:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 8260 states and 11610 transitions. [2023-04-01 00:07:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-01 00:07:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8260 states and 11610 transitions. [2023-04-01 00:07:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:11,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:11,766 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:11,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:11,977 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 [2023-04-01 00:07:11,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:11,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1021803233, now seen corresponding path program 1 times [2023-04-01 00:07:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329588048] [2023-04-01 00:07:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:12,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329588048] [2023-04-01 00:07:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329588048] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411839539] [2023-04-01 00:07:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:12,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:12,538 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) [2023-04-01 00:07:12,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 00:07:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:12,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 2351 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 00:07:12,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 00:07:13,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411839539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:13,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:13,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438347025] [2023-04-01 00:07:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:13,051 INFO L87 Difference]: Start difference. First operand 8260 states and 11610 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-04-01 00:07:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:14,162 INFO L93 Difference]: Finished difference Result 24587 states and 36976 transitions. [2023-04-01 00:07:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 316 [2023-04-01 00:07:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:14,319 INFO L225 Difference]: With dead ends: 24587 [2023-04-01 00:07:14,319 INFO L226 Difference]: Without dead ends: 16344 [2023-04-01 00:07:14,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:14,416 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 270 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:14,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 794 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16344 states. [2023-04-01 00:07:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16344 to 16261. [2023-04-01 00:07:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16261 states, 10998 states have (on average 1.4422622294962721) internal successors, (15862), 11847 states have internal predecessors, (15862), 3131 states have call successors, (3131), 2390 states have call predecessors, (3131), 2131 states have return successors, (4786), 2841 states have call predecessors, (4786), 3128 states have call successors, (4786) [2023-04-01 00:07:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16261 states to 16261 states and 23779 transitions. [2023-04-01 00:07:15,535 INFO L78 Accepts]: Start accepts. Automaton has 16261 states and 23779 transitions. Word has length 316 [2023-04-01 00:07:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 16261 states and 23779 transitions. [2023-04-01 00:07:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-04-01 00:07:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16261 states and 23779 transitions. [2023-04-01 00:07:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:15,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:15,607 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:15,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:15,817 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 [2023-04-01 00:07:15,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:15,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1750465758, now seen corresponding path program 1 times [2023-04-01 00:07:15,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:15,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059319868] [2023-04-01 00:07:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:15,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:16,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059319868] [2023-04-01 00:07:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059319868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:16,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581978993] [2023-04-01 00:07:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:16,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:16,295 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) [2023-04-01 00:07:16,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 00:07:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:16,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:16,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-04-01 00:07:16,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:16,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581978993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:16,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989084251] [2023-04-01 00:07:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:16,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:16,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:16,955 INFO L87 Difference]: Start difference. First operand 16261 states and 23779 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 00:07:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:17,891 INFO L93 Difference]: Finished difference Result 24459 states and 35453 transitions. [2023-04-01 00:07:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) Word has length 316 [2023-04-01 00:07:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:18,028 INFO L225 Difference]: With dead ends: 24459 [2023-04-01 00:07:18,028 INFO L226 Difference]: Without dead ends: 16295 [2023-04-01 00:07:18,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:18,093 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 251 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:18,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 546 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2023-04-01 00:07:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 16260. [2023-04-01 00:07:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 10998 states have (on average 1.4349881796690307) internal successors, (15782), 11847 states have internal predecessors, (15782), 3130 states have call successors, (3130), 2390 states have call predecessors, (3130), 2131 states have return successors, (4016), 2839 states have call predecessors, (4016), 3127 states have call successors, (4016) [2023-04-01 00:07:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 22928 transitions. [2023-04-01 00:07:19,283 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 22928 transitions. Word has length 316 [2023-04-01 00:07:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:19,284 INFO L495 AbstractCegarLoop]: Abstraction has 16260 states and 22928 transitions. [2023-04-01 00:07:19,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 00:07:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 22928 transitions. [2023-04-01 00:07:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:19,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:19,360 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:19,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:19,572 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 [2023-04-01 00:07:19,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:19,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1573303177, now seen corresponding path program 1 times [2023-04-01 00:07:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:19,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371940121] [2023-04-01 00:07:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:20,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371940121] [2023-04-01 00:07:20,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371940121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:20,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116554081] [2023-04-01 00:07:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:20,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:20,022 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) [2023-04-01 00:07:20,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 00:07:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:20,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 2351 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:20,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-04-01 00:07:20,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116554081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689109243] [2023-04-01 00:07:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:20,666 INFO L87 Difference]: Start difference. First operand 16260 states and 22928 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 00:07:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:22,428 INFO L93 Difference]: Finished difference Result 48459 states and 71355 transitions. [2023-04-01 00:07:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 316 [2023-04-01 00:07:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:22,634 INFO L225 Difference]: With dead ends: 48459 [2023-04-01 00:07:22,635 INFO L226 Difference]: Without dead ends: 32215 [2023-04-01 00:07:22,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:22,782 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 272 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:22,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 546 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32215 states. [2023-04-01 00:07:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32215 to 32116. [2023-04-01 00:07:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32116 states, 21766 states have (on average 1.4292933933657999) internal successors, (31110), 23367 states have internal predecessors, (31110), 6186 states have call successors, (6186), 4774 states have call predecessors, (6186), 4163 states have return successors, (8658), 5511 states have call predecessors, (8658), 6183 states have call successors, (8658) [2023-04-01 00:07:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32116 states to 32116 states and 45954 transitions. [2023-04-01 00:07:25,485 INFO L78 Accepts]: Start accepts. Automaton has 32116 states and 45954 transitions. Word has length 316 [2023-04-01 00:07:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:25,488 INFO L495 AbstractCegarLoop]: Abstraction has 32116 states and 45954 transitions. [2023-04-01 00:07:25,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 00:07:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32116 states and 45954 transitions. [2023-04-01 00:07:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:25,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:25,595 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:25,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:25,806 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 [2023-04-01 00:07:25,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:25,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 625025684, now seen corresponding path program 1 times [2023-04-01 00:07:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:25,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080808767] [2023-04-01 00:07:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 00:07:26,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080808767] [2023-04-01 00:07:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080808767] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644283771] [2023-04-01 00:07:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:26,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:26,485 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) [2023-04-01 00:07:26,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 00:07:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:26,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 00:07:26,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-04-01 00:07:27,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:27,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644283771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:27,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:27,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 00:07:27,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246989921] [2023-04-01 00:07:27,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:27,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:27,015 INFO L87 Difference]: Start difference. First operand 32116 states and 45954 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-04-01 00:07:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:31,296 INFO L93 Difference]: Finished difference Result 95739 states and 144341 transitions. [2023-04-01 00:07:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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 316 [2023-04-01 00:07:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:31,911 INFO L225 Difference]: With dead ends: 95739 [2023-04-01 00:07:31,911 INFO L226 Difference]: Without dead ends: 63639 [2023-04-01 00:07:32,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:32,374 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 265 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:32,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 546 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63639 states. [2023-04-01 00:07:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63639 to 63444. [2023-04-01 00:07:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63444 states, 43078 states have (on average 1.423417985978922) internal successors, (61318), 46087 states have internal predecessors, (61318), 12234 states have call successors, (12234), 9542 states have call predecessors, (12234), 8131 states have return successors, (19304), 10695 states have call predecessors, (19304), 12231 states have call successors, (19304) [2023-04-01 00:07:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63444 states to 63444 states and 92856 transitions. [2023-04-01 00:07:37,946 INFO L78 Accepts]: Start accepts. Automaton has 63444 states and 92856 transitions. Word has length 316 [2023-04-01 00:07:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:37,947 INFO L495 AbstractCegarLoop]: Abstraction has 63444 states and 92856 transitions. [2023-04-01 00:07:37,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-04-01 00:07:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63444 states and 92856 transitions. [2023-04-01 00:07:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 00:07:38,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:38,209 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, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:38,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:38,423 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 [2023-04-01 00:07:38,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:38,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 741821443, now seen corresponding path program 1 times [2023-04-01 00:07:38,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:38,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216642040] [2023-04-01 00:07:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-04-01 00:07:39,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216642040] [2023-04-01 00:07:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216642040] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755293981] [2023-04-01 00:07:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:39,537 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) [2023-04-01 00:07:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 00:07:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:39,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 00:07:39,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 00:07:40,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755293981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:40,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:40,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 00:07:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312653513] [2023-04-01 00:07:40,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:07:40,028 INFO L87 Difference]: Start difference. First operand 63444 states and 92856 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37)