/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.04.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:09:45,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:09:45,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:09:45,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:09:45,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:09:45,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:09:45,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:09:45,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:09:45,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:09:45,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:09:45,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:09:45,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:09:45,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:09:45,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:09:45,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:09:45,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:09:45,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:09:45,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:09:45,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:09:45,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:09:45,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:09:45,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:09:45,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:09:45,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:09:45,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:09:45,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:09:45,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:09:45,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:09:45,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:09:45,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:09:45,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:09:45,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:09:45,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:09:45,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:09:45,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:09:45,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:09:45,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:09:45,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:09:45,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:09:45,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:09:45,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:09:45,351 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 06:09:45,373 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:09:45,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:09:45,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:09:45,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:09:45,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:09:45,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:09:45,375 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:09:45,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:09:45,375 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:09:45,375 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:09:45,376 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:09:45,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:09:45,376 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:09:45,376 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:09:45,376 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:09:45,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:09:45,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:09:45,377 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:09:45,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:09:45,377 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:09:45,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:09:45,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:09:45,378 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:09:45,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:45,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:09:45,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:09:45,380 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:09:45,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:09:45,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:09:45,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:09:45,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:09:45,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:09:45,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:09:45,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:09:45,613 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:09:45,614 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:09:45,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-04-01 06:09:46,720 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:09:46,888 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:09:46,889 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-04-01 06:09:46,903 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63e685b4/63ce7d777d73455d97086ff837513247/FLAG3790e648c [2023-04-01 06:09:46,914 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63e685b4/63ce7d777d73455d97086ff837513247 [2023-04-01 06:09:46,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:09:46,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:09:46,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:46,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:09:46,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:09:46,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:46" (1/1) ... [2023-04-01 06:09:46,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe92632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:46, skipping insertion in model container [2023-04-01 06:09:46,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:46" (1/1) ... [2023-04-01 06:09:46,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:09:46,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:09:47,040 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.04.cil-1.c[671,684] [2023-04-01 06:09:47,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:47,093 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:09:47,100 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.04.cil-1.c[671,684] [2023-04-01 06:09:47,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:47,134 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:09:47,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47 WrapperNode [2023-04-01 06:09:47,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:47,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:09:47,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:09:47,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:09:47,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,168 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:09:47,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:09:47,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:09:47,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:09:47,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (1/1) ... [2023-04-01 06:09:47,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:47,202 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 06:09:47,214 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 06:09:47,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 06:09:47,244 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 06:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 06:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:09:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:09:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:09:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:09:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:09:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 06:09:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 06:09:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:09:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:09:47,314 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:09:47,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:09:47,677 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:09:47,863 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:09:47,863 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-04-01 06:09:47,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:09:47 BoogieIcfgContainer [2023-04-01 06:09:47,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:09:47,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:09:47,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:09:47,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:09:47,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:09:46" (1/3) ... [2023-04-01 06:09:47,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2568073b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:09:47, skipping insertion in model container [2023-04-01 06:09:47,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:47" (2/3) ... [2023-04-01 06:09:47,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2568073b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:09:47, skipping insertion in model container [2023-04-01 06:09:47,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:09:47" (3/3) ... [2023-04-01 06:09:47,871 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2023-04-01 06:09:47,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:09:47,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:09:47,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:09:47,926 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;@21806c43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:09:47,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:09:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 102 states have internal predecessors, (131), 38 states have call successors, (38), 26 states have call predecessors, (38), 26 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-01 06:09:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 06:09:47,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:47,938 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] [2023-04-01 06:09:47,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:47,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1741572902, now seen corresponding path program 1 times [2023-04-01 06:09:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992441129] [2023-04-01 06:09:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:48,607 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 06:09:48,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992441129] [2023-04-01 06:09:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992441129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:48,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:48,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:09:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830956062] [2023-04-01 06:09:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:48,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:09:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:09:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:09:48,656 INFO L87 Difference]: Start difference. First operand has 159 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 102 states have internal predecessors, (131), 38 states have call successors, (38), 26 states have call predecessors, (38), 26 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 06:09:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:49,774 INFO L93 Difference]: Finished difference Result 1206 states and 1815 transitions. [2023-04-01 06:09:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:09:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2023-04-01 06:09:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:49,791 INFO L225 Difference]: With dead ends: 1206 [2023-04-01 06:09:49,791 INFO L226 Difference]: Without dead ends: 1015 [2023-04-01 06:09:49,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:09:49,798 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 1382 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:49,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1397 Valid, 1041 Invalid, 1490 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [634 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:09:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2023-04-01 06:09:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 997. [2023-04-01 06:09:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 622 states have (on average 1.355305466237942) internal successors, (843), 666 states have internal predecessors, (843), 224 states have call successors, (224), 162 states have call predecessors, (224), 150 states have return successors, (348), 207 states have call predecessors, (348), 221 states have call successors, (348) [2023-04-01 06:09:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1415 transitions. [2023-04-01 06:09:49,915 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1415 transitions. Word has length 77 [2023-04-01 06:09:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:49,916 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1415 transitions. [2023-04-01 06:09:49,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 06:09:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1415 transitions. [2023-04-01 06:09:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 06:09:49,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:49,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:49,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:09:49,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:49,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash 649920739, now seen corresponding path program 1 times [2023-04-01 06:09:49,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:49,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272893012] [2023-04-01 06:09:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:49,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 06:09:50,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:50,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272893012] [2023-04-01 06:09:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272893012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105688975] [2023-04-01 06:09:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:50,243 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 06:09:50,297 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 06:09:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:50,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:09:50,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 06:09:50,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:50,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105688975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:50,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:50,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:09:50,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076332708] [2023-04-01 06:09:50,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:50,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:09:50,575 INFO L87 Difference]: Start difference. First operand 997 states and 1415 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-01 06:09:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:50,744 INFO L93 Difference]: Finished difference Result 2097 states and 3101 transitions. [2023-04-01 06:09:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 136 [2023-04-01 06:09:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:50,754 INFO L225 Difference]: With dead ends: 2097 [2023-04-01 06:09:50,755 INFO L226 Difference]: Without dead ends: 1242 [2023-04-01 06:09:50,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 06:09:50,761 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 68 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:50,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 408 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:09:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2023-04-01 06:09:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1179. [2023-04-01 06:09:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 742 states have (on average 1.389487870619946) internal successors, (1031), 810 states have internal predecessors, (1031), 258 states have call successors, (258), 190 states have call predecessors, (258), 178 states have return successors, (453), 230 states have call predecessors, (453), 255 states have call successors, (453) [2023-04-01 06:09:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1742 transitions. [2023-04-01 06:09:50,850 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1742 transitions. Word has length 136 [2023-04-01 06:09:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:50,852 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1742 transitions. [2023-04-01 06:09:50,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-01 06:09:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1742 transitions. [2023-04-01 06:09:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 06:09:50,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:50,862 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, 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 06:09:50,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 06:09:51,070 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 06:09:51,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:51,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1410936437, now seen corresponding path program 1 times [2023-04-01 06:09:51,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:51,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463737658] [2023-04-01 06:09:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 06:09:51,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:51,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463737658] [2023-04-01 06:09:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463737658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:51,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099721468] [2023-04-01 06:09:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:51,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:51,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:51,383 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 06:09:51,385 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 06:09:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:51,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:09:51,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-01 06:09:51,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:51,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099721468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:51,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:51,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:09:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299552037] [2023-04-01 06:09:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:51,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:09:51,735 INFO L87 Difference]: Start difference. First operand 1179 states and 1742 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:09:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:51,912 INFO L93 Difference]: Finished difference Result 3466 states and 5441 transitions. [2023-04-01 06:09:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 184 [2023-04-01 06:09:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:51,926 INFO L225 Difference]: With dead ends: 3466 [2023-04-01 06:09:51,926 INFO L226 Difference]: Without dead ends: 2303 [2023-04-01 06:09:51,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 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 06:09:51,937 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 136 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:51,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 352 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:09:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2023-04-01 06:09:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2288. [2023-04-01 06:09:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 1450 states have (on average 1.3793103448275863) internal successors, (2000), 1571 states have internal predecessors, (2000), 496 states have call successors, (496), 374 states have call predecessors, (496), 341 states have return successors, (905), 433 states have call predecessors, (905), 493 states have call successors, (905) [2023-04-01 06:09:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3401 transitions. [2023-04-01 06:09:52,089 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3401 transitions. Word has length 184 [2023-04-01 06:09:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:52,091 INFO L495 AbstractCegarLoop]: Abstraction has 2288 states and 3401 transitions. [2023-04-01 06:09:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:09:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3401 transitions. [2023-04-01 06:09:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 06:09:52,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:52,096 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, 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 06:09:52,107 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 06:09:52,304 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 06:09:52,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:52,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -257863383, now seen corresponding path program 1 times [2023-04-01 06:09:52,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:52,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870009696] [2023-04-01 06:09:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 06:09:52,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:52,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870009696] [2023-04-01 06:09:52,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870009696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:52,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:09:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449863287] [2023-04-01 06:09:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:52,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:09:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:09:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:09:52,601 INFO L87 Difference]: Start difference. First operand 2288 states and 3401 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 06:09:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:53,523 INFO L93 Difference]: Finished difference Result 9314 states and 16248 transitions. [2023-04-01 06:09:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:09:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 184 [2023-04-01 06:09:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:53,648 INFO L225 Difference]: With dead ends: 9314 [2023-04-01 06:09:53,649 INFO L226 Difference]: Without dead ends: 7042 [2023-04-01 06:09:53,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:09:53,666 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 448 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:53,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 329 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:09:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2023-04-01 06:09:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 6948. [2023-04-01 06:09:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6948 states, 4558 states have (on average 1.4370337867485738) internal successors, (6550), 5099 states have internal predecessors, (6550), 1500 states have call successors, (1500), 990 states have call predecessors, (1500), 889 states have return successors, (3682), 1189 states have call predecessors, (3682), 1497 states have call successors, (3682) [2023-04-01 06:09:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 11732 transitions. [2023-04-01 06:09:54,262 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 11732 transitions. Word has length 184 [2023-04-01 06:09:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:54,262 INFO L495 AbstractCegarLoop]: Abstraction has 6948 states and 11732 transitions. [2023-04-01 06:09:54,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 06:09:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 11732 transitions. [2023-04-01 06:09:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 06:09:54,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:54,272 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, 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 06:09:54,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:09:54,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:54,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -213434940, now seen corresponding path program 1 times [2023-04-01 06:09:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:54,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862007431] [2023-04-01 06:09:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:54,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 06:09:54,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:54,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862007431] [2023-04-01 06:09:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862007431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:54,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:09:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043951074] [2023-04-01 06:09:54,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:09:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:09:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:09:54,627 INFO L87 Difference]: Start difference. First operand 6948 states and 11732 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 06:09:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:56,531 INFO L93 Difference]: Finished difference Result 29872 states and 60863 transitions. [2023-04-01 06:09:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:09:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 184 [2023-04-01 06:09:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:56,703 INFO L225 Difference]: With dead ends: 29872 [2023-04-01 06:09:56,703 INFO L226 Difference]: Without dead ends: 22940 [2023-04-01 06:09:56,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:09:56,780 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 427 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:56,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 402 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:09:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22940 states. [2023-04-01 06:09:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22940 to 22694. [2023-04-01 06:09:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 15236 states have (on average 1.4993436597532162) internal successors, (22844), 17753 states have internal predecessors, (22844), 5091 states have call successors, (5091), 2608 states have call predecessors, (5091), 2366 states have return successors, (16676), 3522 states have call predecessors, (16676), 5088 states have call successors, (16676) [2023-04-01 06:09:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 44611 transitions. [2023-04-01 06:09:58,902 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 44611 transitions. Word has length 184 [2023-04-01 06:09:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:58,903 INFO L495 AbstractCegarLoop]: Abstraction has 22694 states and 44611 transitions. [2023-04-01 06:09:58,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 06:09:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 44611 transitions. [2023-04-01 06:09:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 06:09:58,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:58,946 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, 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] [2023-04-01 06:09:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:09:58,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:58,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365605, now seen corresponding path program 1 times [2023-04-01 06:09:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:58,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940026285] [2023-04-01 06:09:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-01 06:09:59,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940026285] [2023-04-01 06:09:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940026285] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293762950] [2023-04-01 06:09:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:59,377 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 06:09:59,425 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 06:09:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:59,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:09:59,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 06:09:59,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:59,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293762950] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:59,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:59,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 06:09:59,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432821050] [2023-04-01 06:09:59,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:09:59,777 INFO L87 Difference]: Start difference. First operand 22694 states and 44611 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 06:10:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:01,924 INFO L93 Difference]: Finished difference Result 44710 states and 94034 transitions. [2023-04-01 06:10:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 200 [2023-04-01 06:10:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:02,225 INFO L225 Difference]: With dead ends: 44710 [2023-04-01 06:10:02,226 INFO L226 Difference]: Without dead ends: 28409 [2023-04-01 06:10:02,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:10:02,602 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 81 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:02,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 404 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:10:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28409 states. [2023-04-01 06:10:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28409 to 28312. [2023-04-01 06:10:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28312 states, 19118 states have (on average 1.5027199497855424) internal successors, (28729), 22424 states have internal predecessors, (28729), 6320 states have call successors, (6320), 3190 states have call predecessors, (6320), 2873 states have return successors, (23093), 4156 states have call predecessors, (23093), 6317 states have call successors, (23093) [2023-04-01 06:10:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28312 states to 28312 states and 58142 transitions. [2023-04-01 06:10:06,052 INFO L78 Accepts]: Start accepts. Automaton has 28312 states and 58142 transitions. Word has length 200 [2023-04-01 06:10:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:06,052 INFO L495 AbstractCegarLoop]: Abstraction has 28312 states and 58142 transitions. [2023-04-01 06:10:06,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 06:10:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28312 states and 58142 transitions. [2023-04-01 06:10:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-01 06:10:06,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:06,097 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:10:06,125 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 06:10:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:06,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:06,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1832097698, now seen corresponding path program 1 times [2023-04-01 06:10:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:06,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454675003] [2023-04-01 06:10:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-04-01 06:10:06,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:06,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454675003] [2023-04-01 06:10:06,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454675003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:06,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135003190] [2023-04-01 06:10:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:06,860 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 06:10:06,863 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 06:10:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:07,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 06:10:07,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 159 proven. 4 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-04-01 06:10:07,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:10:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-04-01 06:10:07,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135003190] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:10:07,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236800023] [2023-04-01 06:10:07,635 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2023-04-01 06:10:07,635 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:10:07,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:10:07,643 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:10:07,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:10:08,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 88 for LOIs [2023-04-01 06:10:08,351 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 118 for LOIs [2023-04-01 06:10:08,991 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 74 for LOIs [2023-04-01 06:10:09,005 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 108 for LOIs [2023-04-01 06:10:13,029 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:13,831 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:19,806 WARN L223 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 2861 DAG size of output: 90 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:24,998 WARN L223 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 2861 DAG size of output: 90 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:35,226 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:35,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:43,676 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:44,152 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 06:10:47,735 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10