/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.07.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:23:48,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:23:48,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:23:48,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:23:48,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:23:48,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:23:48,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:23:48,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:23:48,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:23:48,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:23:48,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:23:48,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:23:48,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:23:48,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:23:48,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:23:48,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:23:48,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:23:48,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:23:48,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:23:48,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:23:48,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:23:48,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:23:48,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:23:48,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:23:48,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:23:48,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:23:48,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:23:48,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:23:48,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:23:48,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:23:48,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:23:48,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:23:48,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:23:48,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:23:48,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:23:48,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:23:48,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:23:48,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:23:48,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:23:48,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:23:48,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:23:48,126 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 01:23:48,142 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:23:48,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:23:48,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:23:48,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:23:48,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:23:48,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:23:48,143 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:23:48,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:23:48,143 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:23:48,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:23:48,144 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:23:48,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:23:48,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:23:48,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:48,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:23:48,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:23:48,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:23:48,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:23:48,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:23:48,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:23:48,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:23:48,369 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:23:48,370 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:23:48,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2023-04-03 01:23:49,306 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:23:49,481 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:23:49,482 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2023-04-03 01:23:49,494 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84c631e8d/d146e291475d48d6846c8850d9ca70b5/FLAGfc39c6237 [2023-04-03 01:23:49,508 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84c631e8d/d146e291475d48d6846c8850d9ca70b5 [2023-04-03 01:23:49,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:23:49,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:23:49,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:49,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:23:49,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:23:49,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac892cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49, skipping insertion in model container [2023-04-03 01:23:49,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:23:49,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:23:49,633 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.07.cil-1.c[671,684] [2023-04-03 01:23:49,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:49,697 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:23:49,704 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.07.cil-1.c[671,684] [2023-04-03 01:23:49,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:49,768 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:23:49,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49 WrapperNode [2023-04-03 01:23:49,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:49,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:23:49,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:23:49,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:23:49,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:23:49,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:23:49,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:23:49,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:23:49,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (1/1) ... [2023-04-03 01:23:49,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:49,864 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 01:23:49,870 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 01:23:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:23:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:23:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:23:49,894 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:23:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:23:49,896 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:23:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:23:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:23:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:23:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-03 01:23:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:23:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:23:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:23:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-03 01:23:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:23:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:23:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:23:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:23:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:23:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:23:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:23:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:23:49,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:23:50,026 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:23:50,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:23:50,513 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:23:50,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:23:50,682 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-03 01:23:50,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:50 BoogieIcfgContainer [2023-04-03 01:23:50,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:23:50,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:23:50,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:23:50,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:23:50,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:23:49" (1/3) ... [2023-04-03 01:23:50,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c02a7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:50, skipping insertion in model container [2023-04-03 01:23:50,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:49" (2/3) ... [2023-04-03 01:23:50,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c02a7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:50, skipping insertion in model container [2023-04-03 01:23:50,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:50" (3/3) ... [2023-04-03 01:23:50,692 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-1.c [2023-04-03 01:23:50,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:23:50,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:23:50,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:23:50,745 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;@31302551, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:23:50,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:23:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 129 states have (on average 1.434108527131783) internal successors, (185), 141 states have internal predecessors, (185), 47 states have call successors, (47), 32 states have call predecessors, (47), 32 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-04-03 01:23:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-03 01:23:50,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:50,758 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] [2023-04-03 01:23:50,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:50,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -441744302, now seen corresponding path program 1 times [2023-04-03 01:23:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:50,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078717741] [2023-04-03 01:23:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:51,310 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 01:23:51,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:51,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078717741] [2023-04-03 01:23:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078717741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:51,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:23:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254465086] [2023-04-03 01:23:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:51,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:23:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:23:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:23:51,358 INFO L87 Difference]: Start difference. First operand has 210 states, 129 states have (on average 1.434108527131783) internal successors, (185), 141 states have internal predecessors, (185), 47 states have call successors, (47), 32 states have call predecessors, (47), 32 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-03 01:23:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:51,853 INFO L93 Difference]: Finished difference Result 587 states and 830 transitions. [2023-04-03 01:23:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:23:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2023-04-03 01:23:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:51,885 INFO L225 Difference]: With dead ends: 587 [2023-04-03 01:23:51,885 INFO L226 Difference]: Without dead ends: 381 [2023-04-03 01:23:51,889 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 01:23:51,891 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 482 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:51,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 686 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:23:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-04-03 01:23:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 380. [2023-04-03 01:23:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 241 states have (on average 1.3900414937759336) internal successors, (335), 260 states have internal predecessors, (335), 84 states have call successors, (84), 58 states have call predecessors, (84), 54 states have return successors, (82), 79 states have call predecessors, (82), 81 states have call successors, (82) [2023-04-03 01:23:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 501 transitions. [2023-04-03 01:23:51,944 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 501 transitions. Word has length 98 [2023-04-03 01:23:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:51,944 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 501 transitions. [2023-04-03 01:23:51,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-03 01:23:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 501 transitions. [2023-04-03 01:23:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-03 01:23:51,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:51,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:51,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:23:51,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:51,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1623593142, now seen corresponding path program 1 times [2023-04-03 01:23:51,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:51,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704813693] [2023-04-03 01:23:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-03 01:23:52,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704813693] [2023-04-03 01:23:52,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704813693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381309717] [2023-04-03 01:23:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:52,222 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 01:23:52,223 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 01:23:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:52,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:52,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-03 01:23:52,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:52,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381309717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:52,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:52,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:52,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466286981] [2023-04-03 01:23:52,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:52,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:52,548 INFO L87 Difference]: Start difference. First operand 380 states and 501 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-03 01:23:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:52,667 INFO L93 Difference]: Finished difference Result 650 states and 879 transitions. [2023-04-03 01:23:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 181 [2023-04-03 01:23:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:52,672 INFO L225 Difference]: With dead ends: 650 [2023-04-03 01:23:52,672 INFO L226 Difference]: Without dead ends: 464 [2023-04-03 01:23:52,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 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 01:23:52,677 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 100 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:52,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 563 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-03 01:23:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 436. [2023-04-03 01:23:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 281 states have (on average 1.4377224199288257) internal successors, (404), 307 states have internal predecessors, (404), 92 states have call successors, (92), 66 states have call predecessors, (92), 62 states have return successors, (97), 87 states have call predecessors, (97), 89 states have call successors, (97) [2023-04-03 01:23:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 593 transitions. [2023-04-03 01:23:52,727 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 593 transitions. Word has length 181 [2023-04-03 01:23:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:52,729 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 593 transitions. [2023-04-03 01:23:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-03 01:23:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 593 transitions. [2023-04-03 01:23:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:52,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:52,736 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, 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] [2023-04-03 01:23:52,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:52,944 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 01:23:52,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:52,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -35431430, now seen corresponding path program 1 times [2023-04-03 01:23:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700248855] [2023-04-03 01:23:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:23:53,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700248855] [2023-04-03 01:23:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700248855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:53,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840172000] [2023-04-03 01:23:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:53,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:53,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:53,311 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 01:23:53,314 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 01:23:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:53,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:53,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-03 01:23:53,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840172000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136196915] [2023-04-03 01:23:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:53,640 INFO L87 Difference]: Start difference. First operand 436 states and 593 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:23:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:53,721 INFO L93 Difference]: Finished difference Result 993 states and 1378 transitions. [2023-04-03 01:23:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 250 [2023-04-03 01:23:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:53,725 INFO L225 Difference]: With dead ends: 993 [2023-04-03 01:23:53,725 INFO L226 Difference]: Without dead ends: 573 [2023-04-03 01:23:53,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:23:53,728 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 231 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:53,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-04-03 01:23:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2023-04-03 01:23:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 380 states have (on average 1.394736842105263) internal successors, (530), 406 states have internal predecessors, (530), 110 states have call successors, (110), 86 states have call predecessors, (110), 82 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2023-04-03 01:23:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 755 transitions. [2023-04-03 01:23:53,765 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 755 transitions. Word has length 250 [2023-04-03 01:23:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:53,767 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 755 transitions. [2023-04-03 01:23:53,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:23:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 755 transitions. [2023-04-03 01:23:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:53,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:53,771 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, 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] [2023-04-03 01:23:53,795 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 01:23:53,995 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 01:23:53,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:53,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1099489510, now seen corresponding path program 1 times [2023-04-03 01:23:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:53,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333294027] [2023-04-03 01:23:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-04-03 01:23:54,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333294027] [2023-04-03 01:23:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333294027] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076266147] [2023-04-03 01:23:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:54,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:54,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:54,265 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 01:23:54,267 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 01:23:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:54,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:23:54,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:23:54,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:54,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076266147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:54,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:54,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012738167] [2023-04-03 01:23:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:54,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:54,602 INFO L87 Difference]: Start difference. First operand 573 states and 755 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:23:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:54,727 INFO L93 Difference]: Finished difference Result 1674 states and 2322 transitions. [2023-04-03 01:23:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 250 [2023-04-03 01:23:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:54,733 INFO L225 Difference]: With dead ends: 1674 [2023-04-03 01:23:54,734 INFO L226 Difference]: Without dead ends: 1118 [2023-04-03 01:23:54,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:23:54,739 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 183 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 592 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2023-04-03 01:23:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1110. [2023-04-03 01:23:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 743 states have (on average 1.3876177658142665) internal successors, (1031), 791 states have internal predecessors, (1031), 208 states have call successors, (208), 165 states have call predecessors, (208), 158 states have return successors, (270), 200 states have call predecessors, (270), 205 states have call successors, (270) [2023-04-03 01:23:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1509 transitions. [2023-04-03 01:23:54,798 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1509 transitions. Word has length 250 [2023-04-03 01:23:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:54,799 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1509 transitions. [2023-04-03 01:23:54,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:23:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1509 transitions. [2023-04-03 01:23:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-03 01:23:54,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:54,803 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:54,815 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 01:23:55,017 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 01:23:55,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:55,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 752150476, now seen corresponding path program 1 times [2023-04-03 01:23:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961296282] [2023-04-03 01:23:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:23:55,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961296282] [2023-04-03 01:23:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961296282] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770427266] [2023-04-03 01:23:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:55,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:55,287 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 01:23:55,289 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 01:23:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:55,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:23:55,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:23:55,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770427266] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:55,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:55,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405980929] [2023-04-03 01:23:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:55,653 INFO L87 Difference]: Start difference. First operand 1110 states and 1509 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:23:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:55,781 INFO L93 Difference]: Finished difference Result 1666 states and 2236 transitions. [2023-04-03 01:23:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 251 [2023-04-03 01:23:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:55,787 INFO L225 Difference]: With dead ends: 1666 [2023-04-03 01:23:55,787 INFO L226 Difference]: Without dead ends: 1114 [2023-04-03 01:23:55,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 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 01:23:55,790 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 180 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:55,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 464 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-04-03 01:23:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1109. [2023-04-03 01:23:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 743 states have (on average 1.3781965006729475) internal successors, (1024), 791 states have internal predecessors, (1024), 207 states have call successors, (207), 165 states have call predecessors, (207), 158 states have return successors, (221), 198 states have call predecessors, (221), 204 states have call successors, (221) [2023-04-03 01:23:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1452 transitions. [2023-04-03 01:23:55,847 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1452 transitions. Word has length 251 [2023-04-03 01:23:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:55,847 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1452 transitions. [2023-04-03 01:23:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:23:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1452 transitions. [2023-04-03 01:23:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:55,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:55,851 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, 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] [2023-04-03 01:23:55,858 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 01:23:56,058 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 01:23:56,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:56,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 919646363, now seen corresponding path program 1 times [2023-04-03 01:23:56,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388246219] [2023-04-03 01:23:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:23:56,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388246219] [2023-04-03 01:23:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388246219] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60198442] [2023-04-03 01:23:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:56,331 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 01:23:56,375 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 01:23:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:56,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:56,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-03 01:23:56,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:56,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60198442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:56,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:56,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:56,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197921450] [2023-04-03 01:23:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:56,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:56,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:56,656 INFO L87 Difference]: Start difference. First operand 1109 states and 1452 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:56,799 INFO L93 Difference]: Finished difference Result 3272 states and 4397 transitions. [2023-04-03 01:23:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) Word has length 250 [2023-04-03 01:23:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:56,808 INFO L225 Difference]: With dead ends: 3272 [2023-04-03 01:23:56,808 INFO L226 Difference]: Without dead ends: 2179 [2023-04-03 01:23:56,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:23:56,812 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 221 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:56,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 462 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2023-04-03 01:23:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 2170. [2023-04-03 01:23:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 1462 states have (on average 1.3693570451436388) internal successors, (2002), 1551 states have internal predecessors, (2002), 400 states have call successors, (400), 324 states have call predecessors, (400), 307 states have return successors, (438), 379 states have call predecessors, (438), 397 states have call successors, (438) [2023-04-03 01:23:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2840 transitions. [2023-04-03 01:23:56,913 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2840 transitions. Word has length 250 [2023-04-03 01:23:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:56,913 INFO L495 AbstractCegarLoop]: Abstraction has 2170 states and 2840 transitions. [2023-04-03 01:23:56,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2840 transitions. [2023-04-03 01:23:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:56,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:56,919 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, 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] [2023-04-03 01:23:56,944 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 01:23:57,133 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 01:23:57,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:57,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1716986086, now seen corresponding path program 1 times [2023-04-03 01:23:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:57,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589016067] [2023-04-03 01:23:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:23:57,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:57,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589016067] [2023-04-03 01:23:57,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589016067] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:57,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615615735] [2023-04-03 01:23:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:57,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:57,364 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 01:23:57,366 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 01:23:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:57,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:57,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-03 01:23:57,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:57,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615615735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:57,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:57,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248855450] [2023-04-03 01:23:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:57,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:57,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:57,692 INFO L87 Difference]: Start difference. First operand 2170 states and 2840 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:23:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:57,910 INFO L93 Difference]: Finished difference Result 6433 states and 8649 transitions. [2023-04-03 01:23:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 250 [2023-04-03 01:23:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:57,925 INFO L225 Difference]: With dead ends: 6433 [2023-04-03 01:23:57,925 INFO L226 Difference]: Without dead ends: 4279 [2023-04-03 01:23:57,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:23:57,932 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 186 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:57,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 452 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2023-04-03 01:23:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 4264. [2023-04-03 01:23:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 2882 states have (on average 1.3594725884802221) internal successors, (3918), 3047 states have internal predecessors, (3918), 782 states have call successors, (782), 642 states have call predecessors, (782), 599 states have return successors, (884), 731 states have call predecessors, (884), 779 states have call successors, (884) [2023-04-03 01:23:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 5584 transitions. [2023-04-03 01:23:58,145 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 5584 transitions. Word has length 250 [2023-04-03 01:23:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:58,146 INFO L495 AbstractCegarLoop]: Abstraction has 4264 states and 5584 transitions. [2023-04-03 01:23:58,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:23:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 5584 transitions. [2023-04-03 01:23:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:58,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:58,156 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, 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] [2023-04-03 01:23:58,167 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 01:23:58,363 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 01:23:58,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:58,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1645417191, now seen corresponding path program 1 times [2023-04-03 01:23:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086211965] [2023-04-03 01:23:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:23:58,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086211965] [2023-04-03 01:23:58,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086211965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:58,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047741554] [2023-04-03 01:23:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:58,588 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 01:23:58,590 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 01:23:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:58,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:58,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-04-03 01:23:58,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:58,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047741554] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:58,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:58,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857925631] [2023-04-03 01:23:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:58,928 INFO L87 Difference]: Start difference. First operand 4264 states and 5584 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-03 01:23:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:59,264 INFO L93 Difference]: Finished difference Result 12671 states and 17083 transitions. [2023-04-03 01:23:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) Word has length 250 [2023-04-03 01:23:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:59,299 INFO L225 Difference]: With dead ends: 12671 [2023-04-03 01:23:59,299 INFO L226 Difference]: Without dead ends: 8423 [2023-04-03 01:23:59,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:23:59,319 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 207 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:59,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 452 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8423 states. [2023-04-03 01:23:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8423 to 8396. [2023-04-03 01:23:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 5686 states have (on average 1.348927189588463) internal successors, (7670), 5991 states have internal predecessors, (7670), 1538 states have call successors, (1538), 1278 states have call predecessors, (1538), 1171 states have return successors, (1818), 1415 states have call predecessors, (1818), 1535 states have call successors, (1818) [2023-04-03 01:23:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 11026 transitions. [2023-04-03 01:23:59,701 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 11026 transitions. Word has length 250 [2023-04-03 01:23:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:59,701 INFO L495 AbstractCegarLoop]: Abstraction has 8396 states and 11026 transitions. [2023-04-03 01:23:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-03 01:23:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 11026 transitions. [2023-04-03 01:23:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:23:59,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:59,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-03 01:23:59,735 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 01:23:59,931 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 01:23:59,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:59,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2127030984, now seen corresponding path program 1 times [2023-04-03 01:23:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625594303] [2023-04-03 01:23:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-03 01:24:00,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:00,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625594303] [2023-04-03 01:24:00,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625594303] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:00,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142132001] [2023-04-03 01:24:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:00,205 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 01:24:00,207 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 01:24:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:00,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:24:00,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-03 01:24:00,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142132001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:00,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:00,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:24:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819990179] [2023-04-03 01:24:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:00,552 INFO L87 Difference]: Start difference. First operand 8396 states and 11026 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-03 01:24:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:01,220 INFO L93 Difference]: Finished difference Result 24979 states and 33901 transitions. [2023-04-03 01:24:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) Word has length 250 [2023-04-03 01:24:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:01,287 INFO L225 Difference]: With dead ends: 24979 [2023-04-03 01:24:01,287 INFO L226 Difference]: Without dead ends: 16599 [2023-04-03 01:24:01,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 01:24:01,332 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 193 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:01,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 426 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16599 states. [2023-04-03 01:24:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16599 to 16548. [2023-04-03 01:24:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16548 states, 11222 states have (on average 1.3379076813402246) internal successors, (15014), 11783 states have internal predecessors, (15014), 3034 states have call successors, (3034), 2550 states have call predecessors, (3034), 2291 states have return successors, (3824), 2743 states have call predecessors, (3824), 3031 states have call successors, (3824) [2023-04-03 01:24:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16548 states to 16548 states and 21872 transitions. [2023-04-03 01:24:02,123 INFO L78 Accepts]: Start accepts. Automaton has 16548 states and 21872 transitions. Word has length 250 [2023-04-03 01:24:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:02,123 INFO L495 AbstractCegarLoop]: Abstraction has 16548 states and 21872 transitions. [2023-04-03 01:24:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-03 01:24:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16548 states and 21872 transitions. [2023-04-03 01:24:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:24:02,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:02,172 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, 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] [2023-04-03 01:24:02,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-03 01:24:02,379 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 01:24:02,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:02,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1448734919, now seen corresponding path program 1 times [2023-04-03 01:24:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:02,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657064098] [2023-04-03 01:24:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-03 01:24:02,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657064098] [2023-04-03 01:24:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657064098] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:02,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:02,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:24:02,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276267505] [2023-04-03 01:24:02,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:24:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:24:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:24:02,580 INFO L87 Difference]: Start difference. First operand 16548 states and 21872 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:05,587 INFO L93 Difference]: Finished difference Result 68670 states and 101057 transitions. [2023-04-03 01:24:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:24:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 250 [2023-04-03 01:24:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:05,824 INFO L225 Difference]: With dead ends: 68670 [2023-04-03 01:24:05,825 INFO L226 Difference]: Without dead ends: 52138 [2023-04-03 01:24:05,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:05,954 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 676 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:05,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 436 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:24:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52138 states. [2023-04-03 01:24:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52138 to 51876. [2023-04-03 01:24:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51876 states, 35606 states have (on average 1.384204909284952) internal successors, (49286), 38631 states have internal predecessors, (49286), 9882 states have call successors, (9882), 7190 states have call predecessors, (9882), 6387 states have return successors, (15387), 8215 states have call predecessors, (15387), 9879 states have call successors, (15387) [2023-04-03 01:24:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51876 states to 51876 states and 74555 transitions. [2023-04-03 01:24:09,213 INFO L78 Accepts]: Start accepts. Automaton has 51876 states and 74555 transitions. Word has length 250 [2023-04-03 01:24:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:09,214 INFO L495 AbstractCegarLoop]: Abstraction has 51876 states and 74555 transitions. [2023-04-03 01:24:09,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 51876 states and 74555 transitions. [2023-04-03 01:24:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-03 01:24:09,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:09,438 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, 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] [2023-04-03 01:24:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:24:09,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:09,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1066432372, now seen corresponding path program 1 times [2023-04-03 01:24:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:09,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004845668] [2023-04-03 01:24:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-04-03 01:24:09,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004845668] [2023-04-03 01:24:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004845668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:24:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948834731] [2023-04-03 01:24:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:24:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:24:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:24:09,865 INFO L87 Difference]: Start difference. First operand 51876 states and 74555 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:20,952 INFO L93 Difference]: Finished difference Result 226917 states and 374682 transitions. [2023-04-03 01:24:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:24:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 250 [2023-04-03 01:24:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:22,196 INFO L225 Difference]: With dead ends: 226917 [2023-04-03 01:24:22,197 INFO L226 Difference]: Without dead ends: 175057 [2023-04-03 01:24:22,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:22,871 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 674 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:22,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 459 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:24:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175057 states. [2023-04-03 01:24:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175057 to 174285. [2023-04-03 01:24:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174285 states, 120365 states have (on average 1.4492668134424458) internal successors, (174441), 136318 states have internal predecessors, (174441), 35856 states have call successors, (35856), 20560 states have call predecessors, (35856), 18063 states have return successors, (70535), 26383 states have call predecessors, (70535), 35853 states have call successors, (70535) [2023-04-03 01:24:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174285 states to 174285 states and 280832 transitions. [2023-04-03 01:24:35,444 INFO L78 Accepts]: Start accepts. Automaton has 174285 states and 280832 transitions. Word has length 250 [2023-04-03 01:24:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:35,445 INFO L495 AbstractCegarLoop]: Abstraction has 174285 states and 280832 transitions. [2023-04-03 01:24:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-03 01:24:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 174285 states and 280832 transitions. [2023-04-03 01:24:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-04-03 01:24:36,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:36,829 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:36,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:24:36,829 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:36,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1687024513, now seen corresponding path program 1 times [2023-04-03 01:24:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029130454] [2023-04-03 01:24:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 31 proven. 64 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-03 01:24:37,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:37,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029130454] [2023-04-03 01:24:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029130454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:37,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735728478] [2023-04-03 01:24:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:37,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:37,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:37,863 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 01:24:37,864 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 01:24:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:38,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 2353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:24:38,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 225 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2023-04-03 01:24:38,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:24:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 35 proven. 54 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2023-04-03 01:24:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735728478] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:24:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829917946] [2023-04-03 01:24:38,906 INFO L159 IcfgInterpreter]: Started Sifa with 142 locations of interest [2023-04-03 01:24:38,906 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:24:38,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:24:38,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:24:38,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:24:39,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 133 for LOIs [2023-04-03 01:24:39,588 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 178 for LOIs [2023-04-03 01:24:40,375 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 110 for LOIs [2023-04-03 01:24:40,396 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 162 for LOIs [2023-04-03 01:24:40,724 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:40,752 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6561 conjuctions. This might take some time... [2023-04-03 01:24:43,624 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 6561 conjuctions.