/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.12.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:10:53,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:10:53,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:10:53,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:10:53,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:10:53,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:10:53,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:10:53,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:10:53,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:10:53,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:10:53,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:10:53,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:10:53,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:10:53,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:10:53,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:10:53,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:10:53,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:10:53,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:10:53,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:10:53,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:10:53,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:10:53,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:10:53,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:10:53,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:10:53,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:10:53,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:10:53,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:10:53,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:10:53,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:10:53,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:10:53,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:10:53,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:10:53,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:10:53,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:10:53,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:10:53,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:10:53,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:10:53,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:10:53,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:10:53,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:10:53,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:10:53,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:10:53,252 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:10:53,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:10:53,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:10:53,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:10:53,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:10:53,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:10:53,252 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:10:53,253 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:10:53,253 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:10:53,253 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:10:53,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:10:53,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:10:53,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:10:53,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:10:53,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:10:53,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:10:53,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:10:53,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:10:53,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:10:53,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:10:53,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:10:53,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:10:53,474 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:10:53,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2023-04-01 06:10:54,561 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:10:54,792 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:10:54,792 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2023-04-01 06:10:54,814 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd3945ed/03b8f62b86114cfd94c2bebfbda6839a/FLAGb4d780cf3 [2023-04-01 06:10:54,823 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd3945ed/03b8f62b86114cfd94c2bebfbda6839a [2023-04-01 06:10:54,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:10:54,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:10:54,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:10:54,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:10:54,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:10:54,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:10:54" (1/1) ... [2023-04-01 06:10:54,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34198e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:54, skipping insertion in model container [2023-04-01 06:10:54,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:10:54" (1/1) ... [2023-04-01 06:10:54,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:10:54,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:10:54,964 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.12.cil-2.c[671,684] [2023-04-01 06:10:55,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:10:55,045 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:10:55,052 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.12.cil-2.c[671,684] [2023-04-01 06:10:55,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:10:55,107 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:10:55,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55 WrapperNode [2023-04-01 06:10:55,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:10:55,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:10:55,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:10:55,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:10:55,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:10:55,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:10:55,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:10:55,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:10:55,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (1/1) ... [2023-04-01 06:10:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:10:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:55,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:10:55,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:10:55,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:10:55,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:10:55,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-01 06:10:55,233 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-01 06:10:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 06:10:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 06:10:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:10:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:10:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:10:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:10:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:10:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2023-04-01 06:10:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-01 06:10:55,238 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 06:10:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:10:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:10:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:10:55,379 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:10:55,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:10:56,043 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:10:56,357 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:10:56,357 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-04-01 06:10:56,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:10:56 BoogieIcfgContainer [2023-04-01 06:10:56,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:10:56,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:10:56,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:10:56,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:10:56,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:10:54" (1/3) ... [2023-04-01 06:10:56,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc3f512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:10:56, skipping insertion in model container [2023-04-01 06:10:56,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:10:55" (2/3) ... [2023-04-01 06:10:56,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc3f512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:10:56, skipping insertion in model container [2023-04-01 06:10:56,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:10:56" (3/3) ... [2023-04-01 06:10:56,366 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-2.c [2023-04-01 06:10:56,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:10:56,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:10:56,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:10:56,427 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;@4b7717c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:10:56,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:10:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 295 states, 189 states have (on average 1.4550264550264551) internal successors, (275), 206 states have internal predecessors, (275), 62 states have call successors, (62), 42 states have call predecessors, (62), 42 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-04-01 06:10:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:10:56,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:56,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:56,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:56,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash -480104723, now seen corresponding path program 1 times [2023-04-01 06:10:56,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:56,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593729229] [2023-04-01 06:10:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:10:57,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593729229] [2023-04-01 06:10:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593729229] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:57,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:10:57,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:10:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300250961] [2023-04-01 06:10:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:57,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:10:57,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:10:57,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:10:57,109 INFO L87 Difference]: Start difference. First operand has 295 states, 189 states have (on average 1.4550264550264551) internal successors, (275), 206 states have internal predecessors, (275), 62 states have call successors, (62), 42 states have call predecessors, (62), 42 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:10:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:57,727 INFO L93 Difference]: Finished difference Result 842 states and 1210 transitions. [2023-04-01 06:10:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:10:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 133 [2023-04-01 06:10:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:57,745 INFO L225 Difference]: With dead ends: 842 [2023-04-01 06:10:57,745 INFO L226 Difference]: Without dead ends: 551 [2023-04-01 06:10:57,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:10:57,754 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 712 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:57,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1026 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:10:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-01 06:10:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 550. [2023-04-01 06:10:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 361 states have (on average 1.4265927977839334) internal successors, (515), 390 states have internal predecessors, (515), 114 states have call successors, (114), 78 states have call predecessors, (114), 74 states have return successors, (112), 109 states have call predecessors, (112), 111 states have call successors, (112) [2023-04-01 06:10:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 741 transitions. [2023-04-01 06:10:57,826 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 741 transitions. Word has length 133 [2023-04-01 06:10:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:57,827 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 741 transitions. [2023-04-01 06:10:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:10:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 741 transitions. [2023-04-01 06:10:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 06:10:57,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:57,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:10:57,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:57,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 567721267, now seen corresponding path program 1 times [2023-04-01 06:10:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867165526] [2023-04-01 06:10:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-01 06:10:58,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867165526] [2023-04-01 06:10:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867165526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539751952] [2023-04-01 06:10:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:58,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:58,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:10:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:58,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 2343 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:10:58,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 06:10:58,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539751952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:58,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870446674] [2023-04-01 06:10:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:58,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:58,705 INFO L87 Difference]: Start difference. First operand 550 states and 741 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 06:10:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:58,818 INFO L93 Difference]: Finished difference Result 945 states and 1309 transitions. [2023-04-01 06:10:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 256 [2023-04-01 06:10:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:58,822 INFO L225 Difference]: With dead ends: 945 [2023-04-01 06:10:58,822 INFO L226 Difference]: Without dead ends: 674 [2023-04-01 06:10:58,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:58,824 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 155 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:58,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 828 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:10:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-04-01 06:10:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 641. [2023-04-01 06:10:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 426 states have (on average 1.4765258215962442) internal successors, (629), 467 states have internal predecessors, (629), 127 states have call successors, (127), 91 states have call predecessors, (127), 87 states have return successors, (137), 122 states have call predecessors, (137), 124 states have call successors, (137) [2023-04-01 06:10:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 893 transitions. [2023-04-01 06:10:58,848 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 893 transitions. Word has length 256 [2023-04-01 06:10:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:58,849 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 893 transitions. [2023-04-01 06:10:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 06:10:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 893 transitions. [2023-04-01 06:10:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:10:58,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:58,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:10:58,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:10:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:59,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:59,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 231200533, now seen corresponding path program 1 times [2023-04-01 06:10:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:59,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567547978] [2023-04-01 06:10:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:10:59,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:59,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567547978] [2023-04-01 06:10:59,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567547978] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:59,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221473811] [2023-04-01 06:10:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:59,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:10:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:59,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 2767 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:10:59,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 06:10:59,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221473811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:59,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:59,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37365043] [2023-04-01 06:10:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:59,958 INFO L87 Difference]: Start difference. First operand 641 states and 893 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-01 06:11:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:00,061 INFO L93 Difference]: Finished difference Result 1483 states and 2103 transitions. [2023-04-01 06:11:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 360 [2023-04-01 06:11:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:00,064 INFO L225 Difference]: With dead ends: 1483 [2023-04-01 06:11:00,064 INFO L226 Difference]: Without dead ends: 858 [2023-04-01 06:11:00,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:00,067 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 346 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:00,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 437 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-04-01 06:11:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2023-04-01 06:11:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 585 states have (on average 1.4273504273504274) internal successors, (835), 626 states have internal predecessors, (835), 155 states have call successors, (155), 121 states have call predecessors, (155), 117 states have return successors, (165), 150 states have call predecessors, (165), 152 states have call successors, (165) [2023-04-01 06:11:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1155 transitions. [2023-04-01 06:11:00,096 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1155 transitions. Word has length 360 [2023-04-01 06:11:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:00,096 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1155 transitions. [2023-04-01 06:11:00,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-01 06:11:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1155 transitions. [2023-04-01 06:11:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:00,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:00,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:00,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 06:11:00,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:00,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash -830278061, now seen corresponding path program 1 times [2023-04-01 06:11:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:00,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188550842] [2023-04-01 06:11:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:00,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-01 06:11:00,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:00,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188550842] [2023-04-01 06:11:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188550842] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853155814] [2023-04-01 06:11:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:00,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:00,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:00,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:00,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 06:11:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:01,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 06:11:01,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 06:11:01,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853155814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:01,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:01,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561287127] [2023-04-01 06:11:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:01,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:01,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:01,278 INFO L87 Difference]: Start difference. First operand 858 states and 1155 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-01 06:11:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:01,452 INFO L93 Difference]: Finished difference Result 2529 states and 3572 transitions. [2023-04-01 06:11:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 360 [2023-04-01 06:11:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:01,462 INFO L225 Difference]: With dead ends: 2529 [2023-04-01 06:11:01,462 INFO L226 Difference]: Without dead ends: 1688 [2023-04-01 06:11:01,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:01,466 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 272 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:01,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 882 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2023-04-01 06:11:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1680. [2023-04-01 06:11:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1153 states have (on average 1.4232437120555075) internal successors, (1641), 1231 states have internal predecessors, (1641), 298 states have call successors, (298), 235 states have call predecessors, (298), 228 states have return successors, (395), 290 states have call predecessors, (395), 295 states have call successors, (395) [2023-04-01 06:11:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2334 transitions. [2023-04-01 06:11:01,548 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2334 transitions. Word has length 360 [2023-04-01 06:11:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:01,549 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2334 transitions. [2023-04-01 06:11:01,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-01 06:11:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2334 transitions. [2023-04-01 06:11:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-01 06:11:01,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:01,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:01,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:01,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:01,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1592177, now seen corresponding path program 1 times [2023-04-01 06:11:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:01,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885845311] [2023-04-01 06:11:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:11:02,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885845311] [2023-04-01 06:11:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885845311] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733013225] [2023-04-01 06:11:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:02,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:02,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:02,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 06:11:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:02,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 2765 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 06:11:02,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 06:11:02,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733013225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:02,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:02,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49580697] [2023-04-01 06:11:02,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:02,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:02,610 INFO L87 Difference]: Start difference. First operand 1680 states and 2334 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-01 06:11:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:02,802 INFO L93 Difference]: Finished difference Result 4982 states and 7381 transitions. [2023-04-01 06:11:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 362 [2023-04-01 06:11:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:02,815 INFO L225 Difference]: With dead ends: 4982 [2023-04-01 06:11:02,815 INFO L226 Difference]: Without dead ends: 3320 [2023-04-01 06:11:02,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:02,823 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 293 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:02,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 935 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2023-04-01 06:11:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 3307. [2023-04-01 06:11:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 2278 states have (on average 1.4161545215100966) internal successors, (3226), 2427 states have internal predecessors, (3226), 581 states have call successors, (581), 462 states have call predecessors, (581), 447 states have return successors, (984), 565 states have call predecessors, (984), 578 states have call successors, (984) [2023-04-01 06:11:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 4791 transitions. [2023-04-01 06:11:02,956 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 4791 transitions. Word has length 362 [2023-04-01 06:11:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:02,957 INFO L495 AbstractCegarLoop]: Abstraction has 3307 states and 4791 transitions. [2023-04-01 06:11:02,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-01 06:11:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 4791 transitions. [2023-04-01 06:11:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-04-01 06:11:02,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:02,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:02,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:03,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:03,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:03,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1890650282, now seen corresponding path program 1 times [2023-04-01 06:11:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85062743] [2023-04-01 06:11:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-01 06:11:03,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:03,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85062743] [2023-04-01 06:11:03,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85062743] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:03,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973770926] [2023-04-01 06:11:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:03,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:03,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 06:11:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:03,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 06:11:03,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 06:11:03,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973770926] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:03,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:03,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:03,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676146970] [2023-04-01 06:11:03,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:03,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:03,992 INFO L87 Difference]: Start difference. First operand 3307 states and 4791 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-01 06:11:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:04,163 INFO L93 Difference]: Finished difference Result 4966 states and 7085 transitions. [2023-04-01 06:11:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 361 [2023-04-01 06:11:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:04,175 INFO L225 Difference]: With dead ends: 4966 [2023-04-01 06:11:04,175 INFO L226 Difference]: Without dead ends: 3312 [2023-04-01 06:11:04,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:04,180 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 260 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:04,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 667 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2023-04-01 06:11:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3305. [2023-04-01 06:11:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2278 states have (on average 1.4100087796312555) internal successors, (3212), 2427 states have internal predecessors, (3212), 579 states have call successors, (579), 462 states have call predecessors, (579), 447 states have return successors, (774), 561 states have call predecessors, (774), 576 states have call successors, (774) [2023-04-01 06:11:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 4565 transitions. [2023-04-01 06:11:04,322 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 4565 transitions. Word has length 361 [2023-04-01 06:11:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:04,323 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 4565 transitions. [2023-04-01 06:11:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-01 06:11:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 4565 transitions. [2023-04-01 06:11:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:04,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:04,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:04,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:04,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:04,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:04,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 93269489, now seen corresponding path program 1 times [2023-04-01 06:11:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:04,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866344337] [2023-04-01 06:11:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-01 06:11:04,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866344337] [2023-04-01 06:11:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866344337] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981731894] [2023-04-01 06:11:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:04,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:04,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:04,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 06:11:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:05,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:05,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-04-01 06:11:05,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:05,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981731894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:05,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:05,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096453777] [2023-04-01 06:11:05,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:05,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:05,379 INFO L87 Difference]: Start difference. First operand 3305 states and 4565 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 06:11:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:05,699 INFO L93 Difference]: Finished difference Result 9837 states and 14039 transitions. [2023-04-01 06:11:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) Word has length 360 [2023-04-01 06:11:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:05,723 INFO L225 Difference]: With dead ends: 9837 [2023-04-01 06:11:05,723 INFO L226 Difference]: Without dead ends: 6548 [2023-04-01 06:11:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:05,736 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 299 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:05,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 645 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2023-04-01 06:11:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 6533. [2023-04-01 06:11:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 4514 states have (on average 1.4040762073548958) internal successors, (6338), 4799 states have internal predecessors, (6338), 1139 states have call successors, (1139), 918 states have call predecessors, (1139), 879 states have return successors, (1544), 1093 states have call predecessors, (1544), 1136 states have call successors, (1544) [2023-04-01 06:11:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 9021 transitions. [2023-04-01 06:11:05,997 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 9021 transitions. Word has length 360 [2023-04-01 06:11:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:05,997 INFO L495 AbstractCegarLoop]: Abstraction has 6533 states and 9021 transitions. [2023-04-01 06:11:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 06:11:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 9021 transitions. [2023-04-01 06:11:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:06,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:06,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:06,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:06,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:06,222 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:06,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash 715796402, now seen corresponding path program 1 times [2023-04-01 06:11:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:06,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935927789] [2023-04-01 06:11:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:06,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:11:06,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935927789] [2023-04-01 06:11:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935927789] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:06,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816288058] [2023-04-01 06:11:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:06,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:06,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 06:11:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:06,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:07,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-04-01 06:11:07,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816288058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:07,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832739240] [2023-04-01 06:11:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:07,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:07,054 INFO L87 Difference]: Start difference. First operand 6533 states and 9021 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 06:11:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:07,613 INFO L93 Difference]: Finished difference Result 19477 states and 27817 transitions. [2023-04-01 06:11:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 360 [2023-04-01 06:11:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:07,669 INFO L225 Difference]: With dead ends: 19477 [2023-04-01 06:11:07,669 INFO L226 Difference]: Without dead ends: 12960 [2023-04-01 06:11:07,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:07,699 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 341 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:07,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 644 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12960 states. [2023-04-01 06:11:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12960 to 12933. [2023-04-01 06:11:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12933 states, 8950 states have (on average 1.3977653631284916) internal successors, (12510), 9495 states have internal predecessors, (12510), 2251 states have call successors, (2251), 1830 states have call predecessors, (2251), 1731 states have return successors, (3116), 2137 states have call predecessors, (3116), 2248 states have call successors, (3116) [2023-04-01 06:11:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12933 states to 12933 states and 17877 transitions. [2023-04-01 06:11:08,379 INFO L78 Accepts]: Start accepts. Automaton has 12933 states and 17877 transitions. Word has length 360 [2023-04-01 06:11:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:08,379 INFO L495 AbstractCegarLoop]: Abstraction has 12933 states and 17877 transitions. [2023-04-01 06:11:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 06:11:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 12933 states and 17877 transitions. [2023-04-01 06:11:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:08,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:08,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:08,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:08,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:08,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 180980470, now seen corresponding path program 1 times [2023-04-01 06:11:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:08,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457814540] [2023-04-01 06:11:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-01 06:11:09,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457814540] [2023-04-01 06:11:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457814540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955512626] [2023-04-01 06:11:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:09,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:09,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:09,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 06:11:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:09,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:09,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-04-01 06:11:09,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:09,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955512626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:09,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:09,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:09,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965151317] [2023-04-01 06:11:09,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:09,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:09,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:09,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:09,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:09,586 INFO L87 Difference]: Start difference. First operand 12933 states and 17877 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-01 06:11:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:10,966 INFO L93 Difference]: Finished difference Result 38589 states and 55283 transitions. [2023-04-01 06:11:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) Word has length 360 [2023-04-01 06:11:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:11,075 INFO L225 Difference]: With dead ends: 38589 [2023-04-01 06:11:11,076 INFO L226 Difference]: Without dead ends: 25672 [2023-04-01 06:11:11,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:11,138 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 306 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:11,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 626 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:11:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25672 states. [2023-04-01 06:11:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25672 to 25621. [2023-04-01 06:11:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25621 states, 17750 states have (on average 1.3912112676056339) internal successors, (24694), 18791 states have internal predecessors, (24694), 4459 states have call successors, (4459), 3654 states have call predecessors, (4459), 3411 states have return successors, (6378), 4185 states have call predecessors, (6378), 4456 states have call successors, (6378) [2023-04-01 06:11:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25621 states to 25621 states and 35531 transitions. [2023-04-01 06:11:12,603 INFO L78 Accepts]: Start accepts. Automaton has 25621 states and 35531 transitions. Word has length 360 [2023-04-01 06:11:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:12,604 INFO L495 AbstractCegarLoop]: Abstraction has 25621 states and 35531 transitions. [2023-04-01 06:11:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-01 06:11:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25621 states and 35531 transitions. [2023-04-01 06:11:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:12,670 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:12,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:12,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 06:11:12,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:12,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash 436685458, now seen corresponding path program 1 times [2023-04-01 06:11:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:12,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304609294] [2023-04-01 06:11:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:11:13,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304609294] [2023-04-01 06:11:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304609294] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574772369] [2023-04-01 06:11:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:13,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:13,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:13,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 06:11:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:13,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 2740 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:13,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-04-01 06:11:13,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:13,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574772369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:13,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:13,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:13,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58104014] [2023-04-01 06:11:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:13,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:13,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:13,811 INFO L87 Difference]: Start difference. First operand 25621 states and 35531 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-01 06:11:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:16,094 INFO L93 Difference]: Finished difference Result 76477 states and 110305 transitions. [2023-04-01 06:11:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) Word has length 360 [2023-04-01 06:11:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:16,535 INFO L225 Difference]: With dead ends: 76477 [2023-04-01 06:11:16,535 INFO L226 Difference]: Without dead ends: 50872 [2023-04-01 06:11:16,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:16,773 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 292 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:16,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 626 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50872 states. [2023-04-01 06:11:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50872 to 50773. [2023-04-01 06:11:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50773 states, 35206 states have (on average 1.384479918195762) internal successors, (48742), 37191 states have internal predecessors, (48742), 8843 states have call successors, (8843), 7302 states have call predecessors, (8843), 6723 states have return successors, (13300), 8201 states have call predecessors, (13300), 8840 states have call successors, (13300) [2023-04-01 06:11:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50773 states to 50773 states and 70885 transitions. [2023-04-01 06:11:19,851 INFO L78 Accepts]: Start accepts. Automaton has 50773 states and 70885 transitions. Word has length 360 [2023-04-01 06:11:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:19,853 INFO L495 AbstractCegarLoop]: Abstraction has 50773 states and 70885 transitions. [2023-04-01 06:11:19,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-01 06:11:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50773 states and 70885 transitions. [2023-04-01 06:11:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:20,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:20,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:20,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 06:11:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 06:11:20,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:20,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 930025647, now seen corresponding path program 1 times [2023-04-01 06:11:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680845103] [2023-04-01 06:11:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:11:20,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:20,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680845103] [2023-04-01 06:11:20,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680845103] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:20,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790380659] [2023-04-01 06:11:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:20,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:20,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 06:11:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:21,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:21,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-04-01 06:11:21,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:21,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790380659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:21,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:21,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748851481] [2023-04-01 06:11:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:21,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:21,235 INFO L87 Difference]: Start difference. First operand 50773 states and 70885 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-01 06:11:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:25,525 INFO L93 Difference]: Finished difference Result 151581 states and 221339 transitions. [2023-04-01 06:11:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) Word has length 360 [2023-04-01 06:11:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:26,254 INFO L225 Difference]: With dead ends: 151581 [2023-04-01 06:11:26,254 INFO L226 Difference]: Without dead ends: 100824 [2023-04-01 06:11:26,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:26,573 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 320 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 626 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100824 states. [2023-04-01 06:11:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100824 to 100629. [2023-04-01 06:11:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100629 states, 69830 states have (on average 1.377602749534584) internal successors, (96198), 73607 states have internal predecessors, (96198), 17547 states have call successors, (17547), 14598 states have call predecessors, (17547), 13251 states have return successors, (28426), 16073 states have call predecessors, (28426), 17544 states have call successors, (28426) [2023-04-01 06:11:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100629 states to 100629 states and 142171 transitions. [2023-04-01 06:11:32,324 INFO L78 Accepts]: Start accepts. Automaton has 100629 states and 142171 transitions. Word has length 360 [2023-04-01 06:11:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:32,325 INFO L495 AbstractCegarLoop]: Abstraction has 100629 states and 142171 transitions. [2023-04-01 06:11:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-01 06:11:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100629 states and 142171 transitions. [2023-04-01 06:11:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:33,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:33,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:33,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 06:11:33,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:33,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1025423692, now seen corresponding path program 1 times [2023-04-01 06:11:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876619735] [2023-04-01 06:11:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-01 06:11:33,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:33,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876619735] [2023-04-01 06:11:33,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876619735] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017515996] [2023-04-01 06:11:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:33,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 06:11:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:34,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:11:34,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 06:11:34,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017515996] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:34,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:34,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:11:34,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700971166] [2023-04-01 06:11:34,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:34,606 INFO L87 Difference]: Start difference. First operand 100629 states and 142171 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 06:11:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:11:38,904 INFO L93 Difference]: Finished difference Result 151291 states and 212821 transitions. [2023-04-01 06:11:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:11:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) Word has length 360 [2023-04-01 06:11:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:11:39,300 INFO L225 Difference]: With dead ends: 151291 [2023-04-01 06:11:39,301 INFO L226 Difference]: Without dead ends: 100759 [2023-04-01 06:11:39,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:11:39,557 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 271 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:11:39,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 626 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:11:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100759 states. [2023-04-01 06:11:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100759 to 100628. [2023-04-01 06:11:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100628 states, 69830 states have (on average 1.3711871688386081) internal successors, (95750), 73607 states have internal predecessors, (95750), 17546 states have call successors, (17546), 14598 states have call predecessors, (17546), 13251 states have return successors, (24808), 16071 states have call predecessors, (24808), 17543 states have call successors, (24808) [2023-04-01 06:11:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100628 states to 100628 states and 138104 transitions. [2023-04-01 06:11:44,896 INFO L78 Accepts]: Start accepts. Automaton has 100628 states and 138104 transitions. Word has length 360 [2023-04-01 06:11:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:44,897 INFO L495 AbstractCegarLoop]: Abstraction has 100628 states and 138104 transitions. [2023-04-01 06:11:44,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 3 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (39), 2 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 06:11:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 100628 states and 138104 transitions. [2023-04-01 06:11:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 06:11:45,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:45,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 06:11:45,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 06:11:45,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 06:11:45,809 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:45,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash -753825539, now seen corresponding path program 1 times [2023-04-01 06:11:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202707894] [2023-04-01 06:11:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:45,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-04-01 06:11:47,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:11:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202707894] [2023-04-01 06:11:47,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202707894] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:11:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855892406] [2023-04-01 06:11:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:47,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:11:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:11:47,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:11:47,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 06:11:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:11:47,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 06:11:47,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:11:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 06:11:47,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:11:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855892406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:11:47,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:11:47,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 06:11:47,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086277578] [2023-04-01 06:11:47,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:11:47,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:11:47,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:11:47,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:11:47,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:11:47,771 INFO L87 Difference]: Start difference. First operand 100628 states and 138104 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41)