/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/token_ring.13.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:27:33,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:27:33,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:27:33,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:27:33,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:27:33,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:27:33,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:27:33,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:27:33,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:27:33,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:27:33,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:27:33,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:27:33,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:27:33,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:27:33,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:27:33,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:27:33,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:27:33,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:27:33,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:27:33,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:27:33,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:27:33,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:27:33,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:27:33,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:27:33,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:27:33,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:27:33,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:27:33,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:27:33,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:27:33,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:27:33,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:27:33,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:27:33,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:27:33,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:27:33,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:27:33,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:27:33,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:27:33,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:27:33,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:27:33,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:27:33,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:27:33,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:27:33,398 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:27:33,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:27:33,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:27:33,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:27:33,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:27:33,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:27:33,400 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:27:33,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:27:33,400 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:27:33,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:27:33,401 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:27:33,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:27:33,401 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:27:33,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:27:33,402 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:27:33,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:27:33,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:27:33,402 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:27:33,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:27:33,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:27:33,404 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:27:33,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:27:33,404 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:27:33,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:27:33,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:27:33,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:27:33,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:27:33,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:27:33,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:27:33,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:27:33,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:27:33,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:27:33,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:27:33,692 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:27:33,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2023-04-03 01:27:34,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:27:35,142 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:27:35,143 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2023-04-03 01:27:35,169 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba76674dc/ca0609ee051347f1a28a59887d5bb8a1/FLAG61fc88956 [2023-04-03 01:27:35,185 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba76674dc/ca0609ee051347f1a28a59887d5bb8a1 [2023-04-03 01:27:35,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:27:35,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:27:35,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:27:35,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:27:35,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:27:35,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a212aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35, skipping insertion in model container [2023-04-03 01:27:35,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:27:35,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:27:35,411 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.13.cil-1.c[671,684] [2023-04-03 01:27:35,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:27:35,614 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:27:35,624 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.13.cil-1.c[671,684] [2023-04-03 01:27:35,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:27:35,731 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:27:35,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35 WrapperNode [2023-04-03 01:27:35,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:27:35,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:27:35,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:27:35,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:27:35,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:27:35,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:27:35,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:27:35,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:27:35,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (1/1) ... [2023-04-03 01:27:35,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:27:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:35,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:27:35,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:27:35,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:27:35,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:27:35,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:27:35,904 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:27:35,905 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-03 01:27:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:27:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2023-04-03 01:27:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:27:35,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:27:35,910 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:27:35,910 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:27:35,911 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:27:35,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:27:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:27:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:27:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:27:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:27:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:27:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:27:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-03 01:27:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-03 01:27:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-03 01:27:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2023-04-03 01:27:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:27:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:27:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:27:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-03 01:27:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-03 01:27:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-03 01:27:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:27:35,917 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:27:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:27:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:27:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:27:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:27:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:27:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:27:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:27:36,080 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:27:36,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:27:36,914 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:27:37,371 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:27:37,372 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-04-03 01:27:37,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:27:37 BoogieIcfgContainer [2023-04-03 01:27:37,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:27:37,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:27:37,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:27:37,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:27:37,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:27:35" (1/3) ... [2023-04-03 01:27:37,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a71a2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:27:37, skipping insertion in model container [2023-04-03 01:27:37,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:35" (2/3) ... [2023-04-03 01:27:37,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a71a2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:27:37, skipping insertion in model container [2023-04-03 01:27:37,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:27:37" (3/3) ... [2023-04-03 01:27:37,384 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-1.c [2023-04-03 01:27:37,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:27:37,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:27:37,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:27:37,465 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;@bb7aac4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:27:37,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:27:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 317 states, 205 states have (on average 1.4634146341463414) internal successors, (300), 224 states have internal predecessors, (300), 66 states have call successors, (66), 44 states have call predecessors, (66), 44 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-04-03 01:27:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-03 01:27:37,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:37,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:37,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:37,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2043253031, now seen corresponding path program 1 times [2023-04-03 01:27:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868056568] [2023-04-03 01:27:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:27:38,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:38,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868056568] [2023-04-03 01:27:38,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868056568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:38,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:27:38,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:27:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613403678] [2023-04-03 01:27:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:27:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:27:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:27:38,485 INFO L87 Difference]: Start difference. First operand has 317 states, 205 states have (on average 1.4634146341463414) internal successors, (300), 224 states have internal predecessors, (300), 66 states have call successors, (66), 44 states have call predecessors, (66), 44 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:27:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:39,374 INFO L93 Difference]: Finished difference Result 904 states and 1305 transitions. [2023-04-03 01:27:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:27:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 141 [2023-04-03 01:27:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:39,390 INFO L225 Difference]: With dead ends: 904 [2023-04-03 01:27:39,391 INFO L226 Difference]: Without dead ends: 591 [2023-04-03 01:27:39,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:27:39,399 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 767 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1109 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:27:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-04-03 01:27:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 590. [2023-04-03 01:27:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 390 states have (on average 1.4333333333333333) internal successors, (559), 422 states have internal predecessors, (559), 121 states have call successors, (121), 82 states have call predecessors, (121), 78 states have return successors, (118), 115 states have call predecessors, (118), 117 states have call successors, (118) [2023-04-03 01:27:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 798 transitions. [2023-04-03 01:27:39,497 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 798 transitions. Word has length 141 [2023-04-03 01:27:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:39,497 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 798 transitions. [2023-04-03 01:27:39,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:27:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 798 transitions. [2023-04-03 01:27:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-03 01:27:39,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:39,505 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, 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, 1, 1, 1] [2023-04-03 01:27:39,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:27:39,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:39,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash -545285853, now seen corresponding path program 1 times [2023-04-03 01:27:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:39,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132515415] [2023-04-03 01:27:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-03 01:27:40,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132515415] [2023-04-03 01:27:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132515415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699761650] [2023-04-03 01:27:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:40,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:40,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:40,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:27:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:40,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:27:40,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:27:40,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:40,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699761650] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:40,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:40,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:40,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76513290] [2023-04-03 01:27:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:40,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:40,806 INFO L87 Difference]: Start difference. First operand 590 states and 798 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-03 01:27:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:40,981 INFO L93 Difference]: Finished difference Result 1015 states and 1412 transitions. [2023-04-03 01:27:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 273 [2023-04-03 01:27:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:40,988 INFO L225 Difference]: With dead ends: 1015 [2023-04-03 01:27:40,989 INFO L226 Difference]: Without dead ends: 722 [2023-04-03 01:27:40,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:40,991 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 166 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:40,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 895 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2023-04-03 01:27:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 688. [2023-04-03 01:27:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 460 states have (on average 1.482608695652174) internal successors, (682), 505 states have internal predecessors, (682), 135 states have call successors, (135), 96 states have call predecessors, (135), 92 states have return successors, (145), 129 states have call predecessors, (145), 131 states have call successors, (145) [2023-04-03 01:27:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 962 transitions. [2023-04-03 01:27:41,059 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 962 transitions. Word has length 273 [2023-04-03 01:27:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:41,060 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 962 transitions. [2023-04-03 01:27:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-03 01:27:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 962 transitions. [2023-04-03 01:27:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:41,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:41,069 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:41,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 01:27:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:41,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:41,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1709697009, now seen corresponding path program 1 times [2023-04-03 01:27:41,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:41,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71680927] [2023-04-03 01:27:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:41,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:27:41,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71680927] [2023-04-03 01:27:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71680927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82095013] [2023-04-03 01:27:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:41,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:42,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:42,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:27:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:42,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 2956 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:42,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-04-03 01:27:42,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82095013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:42,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:42,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:42,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341825665] [2023-04-03 01:27:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:42,657 INFO L87 Difference]: Start difference. First operand 688 states and 962 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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) [2023-04-03 01:27:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:42,848 INFO L93 Difference]: Finished difference Result 2022 states and 2917 transitions. [2023-04-03 01:27:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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 384 [2023-04-03 01:27:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:42,857 INFO L225 Difference]: With dead ends: 2022 [2023-04-03 01:27:42,857 INFO L226 Difference]: Without dead ends: 1350 [2023-04-03 01:27:42,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:42,863 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 373 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:42,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 751 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2023-04-03 01:27:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1343. [2023-04-03 01:27:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 907 states have (on average 1.48180815876516) internal successors, (1344), 992 states have internal predecessors, (1344), 257 states have call successors, (257), 186 states have call predecessors, (257), 178 states have return successors, (283), 246 states have call predecessors, (283), 253 states have call successors, (283) [2023-04-03 01:27:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1884 transitions. [2023-04-03 01:27:42,998 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1884 transitions. Word has length 384 [2023-04-03 01:27:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:42,998 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 1884 transitions. [2023-04-03 01:27:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 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) [2023-04-03 01:27:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1884 transitions. [2023-04-03 01:27:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:43,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:43,062 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:43,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:43,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:27:43,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:43,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1298726290, now seen corresponding path program 1 times [2023-04-03 01:27:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:43,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525237399] [2023-04-03 01:27:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:27:43,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525237399] [2023-04-03 01:27:43,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525237399] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710083778] [2023-04-03 01:27:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:43,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:43,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:43,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:43,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:27:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:44,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 2947 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:44,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-04-03 01:27:44,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:44,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710083778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:44,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:44,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541315226] [2023-04-03 01:27:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:44,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:44,529 INFO L87 Difference]: Start difference. First operand 1343 states and 1884 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-04-03 01:27:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:44,776 INFO L93 Difference]: Finished difference Result 3978 states and 5754 transitions. [2023-04-03 01:27:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 384 [2023-04-03 01:27:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:44,794 INFO L225 Difference]: With dead ends: 3978 [2023-04-03 01:27:44,794 INFO L226 Difference]: Without dead ends: 2651 [2023-04-03 01:27:44,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:44,806 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 338 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:44,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 706 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-04-03 01:27:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2641. [2023-04-03 01:27:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 1794 states have (on average 1.479375696767001) internal successors, (2654), 1956 states have internal predecessors, (2654), 499 states have call successors, (499), 366 states have call predecessors, (499), 347 states have return successors, (562), 475 states have call predecessors, (562), 495 states have call successors, (562) [2023-04-03 01:27:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 3715 transitions. [2023-04-03 01:27:45,021 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 3715 transitions. Word has length 384 [2023-04-03 01:27:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:45,023 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 3715 transitions. [2023-04-03 01:27:45,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-04-03 01:27:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 3715 transitions. [2023-04-03 01:27:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:45,035 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:45,035 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:45,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:45,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:45,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2039706351, now seen corresponding path program 1 times [2023-04-03 01:27:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878965920] [2023-04-03 01:27:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:27:45,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878965920] [2023-04-03 01:27:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878965920] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553105796] [2023-04-03 01:27:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:45,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:45,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:45,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:27:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:46,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:46,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-03 01:27:46,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:46,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553105796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:46,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:46,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781943587] [2023-04-03 01:27:46,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:46,499 INFO L87 Difference]: Start difference. First operand 2641 states and 3715 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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) [2023-04-03 01:27:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:46,905 INFO L93 Difference]: Finished difference Result 7854 states and 11396 transitions. [2023-04-03 01:27:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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 384 [2023-04-03 01:27:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:46,940 INFO L225 Difference]: With dead ends: 7854 [2023-04-03 01:27:46,940 INFO L226 Difference]: Without dead ends: 5229 [2023-04-03 01:27:46,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:46,965 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 359 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:46,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 706 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2023-04-03 01:27:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 5213. [2023-04-03 01:27:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 3554 states have (on average 1.4760832864378166) internal successors, (5246), 3864 states have internal predecessors, (5246), 979 states have call successors, (979), 726 states have call predecessors, (979), 679 states have return successors, (1132), 923 states have call predecessors, (1132), 975 states have call successors, (1132) [2023-04-03 01:27:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 7357 transitions. [2023-04-03 01:27:47,304 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 7357 transitions. Word has length 384 [2023-04-03 01:27:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:47,304 INFO L495 AbstractCegarLoop]: Abstraction has 5213 states and 7357 transitions. [2023-04-03 01:27:47,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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) [2023-04-03 01:27:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 7357 transitions. [2023-04-03 01:27:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:47,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:47,330 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:47,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:47,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:47,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1753803186, now seen corresponding path program 1 times [2023-04-03 01:27:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:47,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543755186] [2023-04-03 01:27:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:27:48,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543755186] [2023-04-03 01:27:48,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543755186] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840659645] [2023-04-03 01:27:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:48,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:48,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:48,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:27:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:48,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 2929 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:48,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-03 01:27:48,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840659645] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:48,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895091848] [2023-04-03 01:27:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:48,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:48,802 INFO L87 Difference]: Start difference. First operand 5213 states and 7357 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-03 01:27:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:49,407 INFO L93 Difference]: Finished difference Result 15534 states and 22646 transitions. [2023-04-03 01:27:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:49,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 384 [2023-04-03 01:27:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:49,480 INFO L225 Difference]: With dead ends: 15534 [2023-04-03 01:27:49,481 INFO L226 Difference]: Without dead ends: 10337 [2023-04-03 01:27:49,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:49,520 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 352 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:49,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 680 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2023-04-03 01:27:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 10309. [2023-04-03 01:27:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 7046 states have (on average 1.4723247232472325) internal successors, (10374), 7640 states have internal predecessors, (10374), 1931 states have call successors, (1931), 1446 states have call predecessors, (1931), 1331 states have return successors, (2314), 1799 states have call predecessors, (2314), 1927 states have call successors, (2314) [2023-04-03 01:27:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 14619 transitions. [2023-04-03 01:27:50,211 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 14619 transitions. Word has length 384 [2023-04-03 01:27:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:50,212 INFO L495 AbstractCegarLoop]: Abstraction has 10309 states and 14619 transitions. [2023-04-03 01:27:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-03 01:27:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 14619 transitions. [2023-04-03 01:27:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:50,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:50,258 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:50,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:50,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:50,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash -277333937, now seen corresponding path program 1 times [2023-04-03 01:27:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:50,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909615644] [2023-04-03 01:27:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-03 01:27:50,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909615644] [2023-04-03 01:27:50,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909615644] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616248708] [2023-04-03 01:27:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:50,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:50,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:50,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:27:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:51,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:51,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-03 01:27:51,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616248708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:51,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:51,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-03 01:27:51,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084497321] [2023-04-03 01:27:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:27:51,683 INFO L87 Difference]: Start difference. First operand 10309 states and 14619 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 3 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:52,900 INFO L93 Difference]: Finished difference Result 30750 states and 45168 transitions. [2023-04-03 01:27:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 3 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 3 states have call successors, (41) Word has length 384 [2023-04-03 01:27:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:53,047 INFO L225 Difference]: With dead ends: 30750 [2023-04-03 01:27:53,047 INFO L226 Difference]: Without dead ends: 20457 [2023-04-03 01:27:53,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:27:53,147 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 296 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:53,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 680 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20457 states. [2023-04-03 01:27:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20457 to 20405. [2023-04-03 01:27:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20405 states, 13974 states have (on average 1.4682982682123944) internal successors, (20518), 15112 states have internal predecessors, (20518), 3819 states have call successors, (3819), 2886 states have call predecessors, (3819), 2611 states have return successors, (4816), 3511 states have call predecessors, (4816), 3815 states have call successors, (4816) [2023-04-03 01:27:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20405 states to 20405 states and 29153 transitions. [2023-04-03 01:27:54,523 INFO L78 Accepts]: Start accepts. Automaton has 20405 states and 29153 transitions. Word has length 384 [2023-04-03 01:27:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 20405 states and 29153 transitions. [2023-04-03 01:27:54,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 3 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (41), 2 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 20405 states and 29153 transitions. [2023-04-03 01:27:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:27:54,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:54,620 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:54,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:54,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:54,830 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:54,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1604907787, now seen corresponding path program 1 times [2023-04-03 01:27:54,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:54,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394831828] [2023-04-03 01:27:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:54,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-03 01:27:56,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394831828] [2023-04-03 01:27:56,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394831828] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683366326] [2023-04-03 01:27:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:56,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:27:56,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:27:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:56,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:27:56,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:27:56,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683366326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:56,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:56,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:27:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393483455] [2023-04-03 01:27:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:27:56,803 INFO L87 Difference]: Start difference. First operand 20405 states and 29153 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:27:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:58,808 INFO L93 Difference]: Finished difference Result 60862 states and 93319 transitions. [2023-04-03 01:27:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 384 [2023-04-03 01:27:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:59,060 INFO L225 Difference]: With dead ends: 60862 [2023-04-03 01:27:59,060 INFO L226 Difference]: Without dead ends: 40474 [2023-04-03 01:27:59,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:27:59,251 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 326 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:59,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 996 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:27:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40474 states. [2023-04-03 01:28:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40474 to 40310. [2023-04-03 01:28:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40310 states, 27654 states have (on average 1.4617053590800608) internal successors, (40422), 29832 states have internal predecessors, (40422), 7532 states have call successors, (7532), 5734 states have call predecessors, (7532), 5123 states have return successors, (12132), 6857 states have call predecessors, (12132), 7528 states have call successors, (12132) [2023-04-03 01:28:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40310 states to 40310 states and 60086 transitions. [2023-04-03 01:28:02,183 INFO L78 Accepts]: Start accepts. Automaton has 40310 states and 60086 transitions. Word has length 384 [2023-04-03 01:28:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 40310 states and 60086 transitions. [2023-04-03 01:28:02,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:28:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40310 states and 60086 transitions. [2023-04-03 01:28:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:28:02,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:02,352 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:02,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:02,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:02,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1812215210, now seen corresponding path program 1 times [2023-04-03 01:28:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029668088] [2023-04-03 01:28:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:28:03,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:03,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029668088] [2023-04-03 01:28:03,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029668088] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:03,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039515718] [2023-04-03 01:28:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:03,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:03,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:28:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:03,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:28:03,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-03 01:28:03,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039515718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:03,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:28:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613432748] [2023-04-03 01:28:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:28:03,802 INFO L87 Difference]: Start difference. First operand 40310 states and 60086 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 3 states have call successors, (40) [2023-04-03 01:28:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:05,661 INFO L93 Difference]: Finished difference Result 60606 states and 89630 transitions. [2023-04-03 01:28:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:28:05,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 3 states have call successors, (40) Word has length 384 [2023-04-03 01:28:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:05,873 INFO L225 Difference]: With dead ends: 60606 [2023-04-03 01:28:05,873 INFO L226 Difference]: Without dead ends: 40377 [2023-04-03 01:28:06,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:28:06,020 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 303 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:06,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 680 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:28:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40377 states. [2023-04-03 01:28:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40377 to 40309. [2023-04-03 01:28:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40309 states, 27654 states have (on average 1.4559195776379548) internal successors, (40262), 29832 states have internal predecessors, (40262), 7531 states have call successors, (7531), 5734 states have call predecessors, (7531), 5123 states have return successors, (10194), 6855 states have call predecessors, (10194), 7527 states have call successors, (10194) [2023-04-03 01:28:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40309 states to 40309 states and 57987 transitions. [2023-04-03 01:28:08,565 INFO L78 Accepts]: Start accepts. Automaton has 40309 states and 57987 transitions. Word has length 384 [2023-04-03 01:28:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:08,565 INFO L495 AbstractCegarLoop]: Abstraction has 40309 states and 57987 transitions. [2023-04-03 01:28:08,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 3 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 3 states have call successors, (40) [2023-04-03 01:28:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 40309 states and 57987 transitions. [2023-04-03 01:28:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:28:08,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:08,684 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:08,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:08,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 01:28:08,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:08,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1821630953, now seen corresponding path program 1 times [2023-04-03 01:28:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048958548] [2023-04-03 01:28:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-03 01:28:10,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:10,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048958548] [2023-04-03 01:28:10,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048958548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:10,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185627113] [2023-04-03 01:28:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:10,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:10,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:10,121 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:10,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-03 01:28:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:10,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:28:10,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:28:10,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185627113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:10,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:10,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:28:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927617620] [2023-04-03 01:28:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:10,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:28:10,702 INFO L87 Difference]: Start difference. First operand 40309 states and 57987 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:28:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:14,201 INFO L93 Difference]: Finished difference Result 120254 states and 187523 transitions. [2023-04-03 01:28:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:28:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 384 [2023-04-03 01:28:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:14,713 INFO L225 Difference]: With dead ends: 120254 [2023-04-03 01:28:14,713 INFO L226 Difference]: Without dead ends: 79962 [2023-04-03 01:28:15,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:28:15,476 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 334 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:15,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 995 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:28:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79962 states. [2023-04-03 01:28:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79962 to 79638. [2023-04-03 01:28:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79638 states, 54726 states have (on average 1.449073566494902) internal successors, (79302), 58888 states have internal predecessors, (79302), 14860 states have call successors, (14860), 11398 states have call predecessors, (14860), 10051 states have return successors, (25930), 13385 states have call predecessors, (25930), 14856 states have call successors, (25930) [2023-04-03 01:28:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79638 states to 79638 states and 120092 transitions. [2023-04-03 01:28:20,686 INFO L78 Accepts]: Start accepts. Automaton has 79638 states and 120092 transitions. Word has length 384 [2023-04-03 01:28:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:20,688 INFO L495 AbstractCegarLoop]: Abstraction has 79638 states and 120092 transitions. [2023-04-03 01:28:20,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:28:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 79638 states and 120092 transitions. [2023-04-03 01:28:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:28:21,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:21,174 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:21,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 01:28:21,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:21,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -257108230, now seen corresponding path program 1 times [2023-04-03 01:28:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:21,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286264348] [2023-04-03 01:28:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-03 01:28:22,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286264348] [2023-04-03 01:28:22,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286264348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795181624] [2023-04-03 01:28:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:22,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:22,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-03 01:28:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:22,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:28:22,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-04-03 01:28:22,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795181624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:22,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:22,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:28:22,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092134938] [2023-04-03 01:28:22,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:22,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:28:22,710 INFO L87 Difference]: Start difference. First operand 79638 states and 120092 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-03 01:28:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:26,581 INFO L93 Difference]: Finished difference Result 119742 states and 179608 transitions. [2023-04-03 01:28:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:28:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) Word has length 384 [2023-04-03 01:28:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:27,330 INFO L225 Difference]: With dead ends: 119742 [2023-04-03 01:28:27,331 INFO L226 Difference]: Without dead ends: 79769 [2023-04-03 01:28:27,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:28:27,700 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 310 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:27,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 680 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:28:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2023-04-03 01:28:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 79637. [2023-04-03 01:28:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79637 states, 54726 states have (on average 1.4432262544311663) internal successors, (78982), 58888 states have internal predecessors, (78982), 14859 states have call successors, (14859), 11398 states have call predecessors, (14859), 10051 states have return successors, (22248), 13383 states have call predecessors, (22248), 14855 states have call successors, (22248) [2023-04-03 01:28:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79637 states to 79637 states and 116089 transitions. [2023-04-03 01:28:32,385 INFO L78 Accepts]: Start accepts. Automaton has 79637 states and 116089 transitions. Word has length 384 [2023-04-03 01:28:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:32,386 INFO L495 AbstractCegarLoop]: Abstraction has 79637 states and 116089 transitions. [2023-04-03 01:28:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-03 01:28:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79637 states and 116089 transitions. [2023-04-03 01:28:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:28:32,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:32,657 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:32,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-03 01:28:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 01:28:32,859 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:32,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 551843895, now seen corresponding path program 1 times [2023-04-03 01:28:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:32,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647429655] [2023-04-03 01:28:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-03 01:28:34,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647429655] [2023-04-03 01:28:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647429655] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189279805] [2023-04-03 01:28:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:34,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:34,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-03 01:28:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:34,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:28:34,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:28:34,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189279805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:34,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:28:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694554421] [2023-04-03 01:28:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:28:34,680 INFO L87 Difference]: Start difference. First operand 79637 states and 116089 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:28:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:43,442 INFO L93 Difference]: Finished difference Result 237598 states and 381223 transitions. [2023-04-03 01:28:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:28:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 384 [2023-04-03 01:28:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:44,766 INFO L225 Difference]: With dead ends: 237598 [2023-04-03 01:28:44,766 INFO L226 Difference]: Without dead ends: 157978 [2023-04-03 01:28:46,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:28:46,053 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 337 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:46,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 999 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:28:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157978 states. [2023-04-03 01:28:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157978 to 157334. [2023-04-03 01:28:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157334 states, 108294 states have (on average 1.436146046872403) internal successors, (155526), 116232 states have internal predecessors, (155526), 29324 states have call successors, (29324), 22662 states have call predecessors, (29324), 19715 states have return successors, (57388), 26121 states have call predecessors, (57388), 29320 states have call successors, (57388) [2023-04-03 01:28:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157334 states to 157334 states and 242238 transitions. [2023-04-03 01:28:56,367 INFO L78 Accepts]: Start accepts. Automaton has 157334 states and 242238 transitions. Word has length 384 [2023-04-03 01:28:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:56,367 INFO L495 AbstractCegarLoop]: Abstraction has 157334 states and 242238 transitions. [2023-04-03 01:28:56,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2023-04-03 01:28:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 157334 states and 242238 transitions. [2023-04-03 01:28:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-04-03 01:28:57,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:57,136 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:57,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 01:28:57,337 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:57,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2012786344, now seen corresponding path program 1 times [2023-04-03 01:28:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468226736] [2023-04-03 01:28:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-04-03 01:28:58,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468226736] [2023-04-03 01:28:58,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468226736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021588707] [2023-04-03 01:28:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:58,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:58,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-03 01:28:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:58,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:28:58,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 11 proven. 199 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:28:59,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:28:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-03 01:28:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021588707] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:28:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-03 01:28:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999220233] [2023-04-03 01:28:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:28:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:28:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:28:59,570 INFO L87 Difference]: Start difference. First operand 157334 states and 242238 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28)