/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.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:23:44,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:23:44,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:23:44,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:23:44,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:23:44,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:23:44,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:23:44,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:23:44,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:23:44,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:23:44,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:23:44,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:23:44,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:23:44,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:23:44,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:23:44,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:23:44,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:23:44,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:23:44,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:23:44,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:23:44,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:23:44,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:23:44,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:23:44,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:23:44,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:23:44,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:23:44,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:23:44,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:23:44,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:23:44,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:23:44,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:23:44,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:23:44,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:23:44,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:23:44,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:23:44,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:23:44,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:23:44,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:23:44,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:23:44,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:23:44,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:23:44,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:23:44,439 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:23:44,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:23:44,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:23:44,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:23:44,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:23:44,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:23:44,441 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:23:44,441 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:23:44,441 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:23:44,441 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:23:44,442 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:23:44,442 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:23:44,442 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:23:44,442 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:23:44,442 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:23:44,443 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:23:44,443 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:23:44,443 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:23:44,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:23:44,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:23:44,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:23:44,445 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:23:44,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:23:44,445 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:23:44,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:23:44,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:44,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:23:44,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:23:44,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:23:44,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:23:44,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:23:44,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:23:44,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:23:44,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:23:44,714 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:23:44,714 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:23:44,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2023-04-03 01:23:45,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:23:46,129 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:23:46,130 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2023-04-03 01:23:46,144 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b540f68/01ef13d65fdc48689017074a68aeaa67/FLAG719b07290 [2023-04-03 01:23:46,155 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b540f68/01ef13d65fdc48689017074a68aeaa67 [2023-04-03 01:23:46,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:23:46,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:23:46,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:46,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:23:46,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:23:46,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc7ff66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46, skipping insertion in model container [2023-04-03 01:23:46,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:23:46,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:23:46,318 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.06.cil-1.c[671,684] [2023-04-03 01:23:46,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:46,423 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:23:46,432 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.06.cil-1.c[671,684] [2023-04-03 01:23:46,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:46,485 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:23:46,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46 WrapperNode [2023-04-03 01:23:46,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:46,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:23:46,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:23:46,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:23:46,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:23:46,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:23:46,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:23:46,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:23:46,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (1/1) ... [2023-04-03 01:23:46,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:46,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:23:46,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:23:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:23:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:23:46,613 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:23:46,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:23:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:23:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:23:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:23:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:23:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:23:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:23:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:23:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:23:46,701 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:23:46,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:23:47,279 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:23:47,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:23:47,584 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-03 01:23:47,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:47 BoogieIcfgContainer [2023-04-03 01:23:47,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:23:47,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:23:47,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:23:47,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:23:47,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:23:46" (1/3) ... [2023-04-03 01:23:47,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ad364b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:47, skipping insertion in model container [2023-04-03 01:23:47,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:46" (2/3) ... [2023-04-03 01:23:47,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ad364b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:47, skipping insertion in model container [2023-04-03 01:23:47,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:47" (3/3) ... [2023-04-03 01:23:47,597 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2023-04-03 01:23:47,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:23:47,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:23:47,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:23:47,661 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;@4981a467, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:23:47,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:23:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 121 states have (on average 1.43801652892562) internal successors, (174), 133 states have internal predecessors, (174), 45 states have call successors, (45), 30 states have call predecessors, (45), 30 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-03 01:23:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 01:23:47,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:47,676 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] [2023-04-03 01:23:47,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:47,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -878387871, now seen corresponding path program 1 times [2023-04-03 01:23:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207679105] [2023-04-03 01:23:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:48,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207679105] [2023-04-03 01:23:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207679105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:48,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:48,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:23:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341563117] [2023-04-03 01:23:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:48,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:23:48,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:23:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:23:48,666 INFO L87 Difference]: Start difference. First operand has 198 states, 121 states have (on average 1.43801652892562) internal successors, (174), 133 states have internal predecessors, (174), 45 states have call successors, (45), 30 states have call predecessors, (45), 30 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:23:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:50,333 INFO L93 Difference]: Finished difference Result 1553 states and 2366 transitions. [2023-04-03 01:23:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:23:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2023-04-03 01:23:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:50,371 INFO L225 Difference]: With dead ends: 1553 [2023-04-03 01:23:50,372 INFO L226 Difference]: Without dead ends: 1323 [2023-04-03 01:23:50,380 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 [2023-04-03 01:23:50,383 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 1861 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:50,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 1429 Invalid, 1795 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [723 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 01:23:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2023-04-03 01:23:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1303. [2023-04-03 01:23:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 843 states have (on average 1.3914590747330962) internal successors, (1173), 904 states have internal predecessors, (1173), 275 states have call successors, (275), 196 states have call predecessors, (275), 184 states have return successors, (432), 257 states have call predecessors, (432), 271 states have call successors, (432) [2023-04-03 01:23:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1880 transitions. [2023-04-03 01:23:50,567 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1880 transitions. Word has length 92 [2023-04-03 01:23:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:50,568 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 1880 transitions. [2023-04-03 01:23:50,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:23:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1880 transitions. [2023-04-03 01:23:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 01:23:50,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:50,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:50,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:23:50,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:50,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 182428119, now seen corresponding path program 1 times [2023-04-03 01:23:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626677456] [2023-04-03 01:23:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-03 01:23:51,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626677456] [2023-04-03 01:23:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626677456] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548731908] [2023-04-03 01:23:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:51,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:51,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:51,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:23:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:51,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:51,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-03 01:23:51,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548731908] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:51,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:51,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:51,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105229517] [2023-04-03 01:23:51,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:51,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:51,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:51,457 INFO L87 Difference]: Start difference. First operand 1303 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-03 01:23:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:51,677 INFO L93 Difference]: Finished difference Result 2738 states and 4118 transitions. [2023-04-03 01:23:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 168 [2023-04-03 01:23:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:51,696 INFO L225 Difference]: With dead ends: 2738 [2023-04-03 01:23:51,697 INFO L226 Difference]: Without dead ends: 1612 [2023-04-03 01:23:51,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:51,706 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 90 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:51,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 528 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2023-04-03 01:23:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1545. [2023-04-03 01:23:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1003 states have (on average 1.4287138584247259) internal successors, (1433), 1100 states have internal predecessors, (1433), 321 states have call successors, (321), 232 states have call predecessors, (321), 220 states have return successors, (579), 288 states have call predecessors, (579), 317 states have call successors, (579) [2023-04-03 01:23:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2333 transitions. [2023-04-03 01:23:51,840 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2333 transitions. Word has length 168 [2023-04-03 01:23:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:51,841 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2333 transitions. [2023-04-03 01:23:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-03 01:23:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2333 transitions. [2023-04-03 01:23:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:23:51,847 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:51,848 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, 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] [2023-04-03 01:23:51,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:52,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:52,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash -74565514, now seen corresponding path program 1 times [2023-04-03 01:23:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:52,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203416339] [2023-04-03 01:23:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-03 01:23:52,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203416339] [2023-04-03 01:23:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203416339] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:52,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901975130] [2023-04-03 01:23:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:52,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:52,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:52,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:52,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:23:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:52,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:52,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-04-03 01:23:52,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:52,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901975130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:52,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:52,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:52,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889137205] [2023-04-03 01:23:52,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:52,946 INFO L87 Difference]: Start difference. First operand 1545 states and 2333 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2023-04-03 01:23:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:53,190 INFO L93 Difference]: Finished difference Result 4564 states and 7312 transitions. [2023-04-03 01:23:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 230 [2023-04-03 01:23:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:53,218 INFO L225 Difference]: With dead ends: 4564 [2023-04-03 01:23:53,218 INFO L226 Difference]: Without dead ends: 3035 [2023-04-03 01:23:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:53,233 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 206 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:53,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 442 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2023-04-03 01:23:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3019. [2023-04-03 01:23:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 1972 states have (on average 1.4219066937119675) internal successors, (2804), 2150 states have internal predecessors, (2804), 621 states have call successors, (621), 458 states have call predecessors, (621), 425 states have return successors, (1157), 549 states have call predecessors, (1157), 617 states have call successors, (1157) [2023-04-03 01:23:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4582 transitions. [2023-04-03 01:23:53,492 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4582 transitions. Word has length 230 [2023-04-03 01:23:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:53,493 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 4582 transitions. [2023-04-03 01:23:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2023-04-03 01:23:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4582 transitions. [2023-04-03 01:23:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:23:53,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:53,506 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, 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] [2023-04-03 01:23:53,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 01:23:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:23:53,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:53,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash -767457547, now seen corresponding path program 1 times [2023-04-03 01:23:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210192382] [2023-04-03 01:23:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-03 01:23:54,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210192382] [2023-04-03 01:23:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210192382] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994203078] [2023-04-03 01:23:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:54,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:54,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:23:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:54,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:54,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-04-03 01:23:54,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994203078] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:54,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:54,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560113628] [2023-04-03 01:23:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:54,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:54,513 INFO L87 Difference]: Start difference. First operand 3019 states and 4582 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:54,908 INFO L93 Difference]: Finished difference Result 8948 states and 14457 transitions. [2023-04-03 01:23:54,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:54,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) Word has length 230 [2023-04-03 01:23:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:54,953 INFO L225 Difference]: With dead ends: 8948 [2023-04-03 01:23:54,953 INFO L226 Difference]: Without dead ends: 5945 [2023-04-03 01:23:54,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:54,983 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 192 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:54,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 402 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5945 states. [2023-04-03 01:23:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5945 to 5917. [2023-04-03 01:23:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5917 states, 3882 states have (on average 1.4142194744976817) internal successors, (5490), 4208 states have internal predecessors, (5490), 1211 states have call successors, (1211), 910 states have call predecessors, (1211), 823 states have return successors, (2367), 1051 states have call predecessors, (2367), 1207 states have call successors, (2367) [2023-04-03 01:23:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5917 states to 5917 states and 9068 transitions. [2023-04-03 01:23:55,474 INFO L78 Accepts]: Start accepts. Automaton has 5917 states and 9068 transitions. Word has length 230 [2023-04-03 01:23:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:55,474 INFO L495 AbstractCegarLoop]: Abstraction has 5917 states and 9068 transitions. [2023-04-03 01:23:55,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5917 states and 9068 transitions. [2023-04-03 01:23:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:23:55,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:55,492 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, 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] [2023-04-03 01:23:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:55,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:55,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -978415692, now seen corresponding path program 1 times [2023-04-03 01:23:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694060346] [2023-04-03 01:23:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-03 01:23:56,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694060346] [2023-04-03 01:23:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694060346] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039096957] [2023-04-03 01:23:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:56,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:56,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:23:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:56,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:23:56,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-03 01:23:56,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039096957] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:56,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:56,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:23:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782096285] [2023-04-03 01:23:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:56,507 INFO L87 Difference]: Start difference. First operand 5917 states and 9068 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:57,221 INFO L93 Difference]: Finished difference Result 17566 states and 28852 transitions. [2023-04-03 01:23:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) Word has length 230 [2023-04-03 01:23:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:57,307 INFO L225 Difference]: With dead ends: 17566 [2023-04-03 01:23:57,308 INFO L226 Difference]: Without dead ends: 11665 [2023-04-03 01:23:57,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:57,370 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 178 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:57,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 402 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11665 states. [2023-04-03 01:23:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11665 to 11613. [2023-04-03 01:23:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11613 states, 7646 states have (on average 1.4059639026942192) internal successors, (10750), 8240 states have internal predecessors, (10750), 2371 states have call successors, (2371), 1814 states have call predecessors, (2371), 1595 states have return successors, (4991), 2015 states have call predecessors, (4991), 2367 states have call successors, (4991) [2023-04-03 01:23:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11613 states to 11613 states and 18112 transitions. [2023-04-03 01:23:58,331 INFO L78 Accepts]: Start accepts. Automaton has 11613 states and 18112 transitions. Word has length 230 [2023-04-03 01:23:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:58,332 INFO L495 AbstractCegarLoop]: Abstraction has 11613 states and 18112 transitions. [2023-04-03 01:23:58,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-03 01:23:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11613 states and 18112 transitions. [2023-04-03 01:23:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:23:58,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:58,363 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, 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] [2023-04-03 01:23:58,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:58,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:58,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:58,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash -115835418, now seen corresponding path program 1 times [2023-04-03 01:23:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:58,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199190739] [2023-04-03 01:23:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-03 01:23:58,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:58,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199190739] [2023-04-03 01:23:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199190739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:58,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014741322] [2023-04-03 01:23:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:58,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:58,861 INFO L87 Difference]: Start difference. First operand 11613 states and 18112 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:24:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:02,301 INFO L93 Difference]: Finished difference Result 48386 states and 90566 transitions. [2023-04-03 01:24:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:24:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 230 [2023-04-03 01:24:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:02,589 INFO L225 Difference]: With dead ends: 48386 [2023-04-03 01:24:02,589 INFO L226 Difference]: Without dead ends: 36789 [2023-04-03 01:24:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:02,760 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 635 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:02,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 389 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:24:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2023-04-03 01:24:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 36429. [2023-04-03 01:24:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36429 states, 24558 states have (on average 1.4651844612753482) internal successors, (35982), 27440 states have internal predecessors, (35982), 7603 states have call successors, (7603), 4950 states have call predecessors, (7603), 4267 states have return successors, (21107), 5839 states have call predecessors, (21107), 7599 states have call successors, (21107) [2023-04-03 01:24:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36429 states to 36429 states and 64692 transitions. [2023-04-03 01:24:06,773 INFO L78 Accepts]: Start accepts. Automaton has 36429 states and 64692 transitions. Word has length 230 [2023-04-03 01:24:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:06,774 INFO L495 AbstractCegarLoop]: Abstraction has 36429 states and 64692 transitions. [2023-04-03 01:24:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:24:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36429 states and 64692 transitions. [2023-04-03 01:24:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:24:06,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:06,837 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, 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] [2023-04-03 01:24:06,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:24:06,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:06,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 422610862, now seen corresponding path program 1 times [2023-04-03 01:24:06,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:06,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776626825] [2023-04-03 01:24:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:06,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-03 01:24:07,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776626825] [2023-04-03 01:24:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776626825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:24:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:24:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706915759] [2023-04-03 01:24:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:24:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:24:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:24:07,127 INFO L87 Difference]: Start difference. First operand 36429 states and 64692 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:24:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:17,725 INFO L93 Difference]: Finished difference Result 161980 states and 356145 transitions. [2023-04-03 01:24:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:24:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 230 [2023-04-03 01:24:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:19,219 INFO L225 Difference]: With dead ends: 161980 [2023-04-03 01:24:19,220 INFO L226 Difference]: Without dead ends: 125567 [2023-04-03 01:24:19,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:24:19,917 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 608 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:19,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 488 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:24:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125567 states. [2023-04-03 01:24:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125567 to 124527. [2023-04-03 01:24:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124527 states, 85196 states have (on average 1.5352363960749331) internal successors, (130796), 99522 states have internal predecessors, (130796), 27670 states have call successors, (27670), 13732 states have call predecessors, (27670), 11660 states have return successors, (100487), 18444 states have call predecessors, (100487), 27666 states have call successors, (100487) [2023-04-03 01:24:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124527 states to 124527 states and 258953 transitions. [2023-04-03 01:24:31,996 INFO L78 Accepts]: Start accepts. Automaton has 124527 states and 258953 transitions. Word has length 230 [2023-04-03 01:24:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:31,996 INFO L495 AbstractCegarLoop]: Abstraction has 124527 states and 258953 transitions. [2023-04-03 01:24:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:24:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 124527 states and 258953 transitions. [2023-04-03 01:24:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-03 01:24:32,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:32,328 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, 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] [2023-04-03 01:24:32,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:24:32,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:32,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash -308960722, now seen corresponding path program 1 times [2023-04-03 01:24:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759353343] [2023-04-03 01:24:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-04-03 01:24:32,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:32,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759353343] [2023-04-03 01:24:32,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759353343] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:32,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798527374] [2023-04-03 01:24:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:32,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:32,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:32,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:24:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:33,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:24:33,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-03 01:24:33,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798527374] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:24:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18370599] [2023-04-03 01:24:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:24:33,057 INFO L87 Difference]: Start difference. First operand 124527 states and 258953 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:24:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:49,047 INFO L93 Difference]: Finished difference Result 241282 states and 523080 transitions. [2023-04-03 01:24:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 248 [2023-04-03 01:24:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:50,526 INFO L225 Difference]: With dead ends: 241282 [2023-04-03 01:24:50,526 INFO L226 Difference]: Without dead ends: 177598 [2023-04-03 01:24:52,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:24:52,127 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 161 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:52,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 589 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:24:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177598 states. [2023-04-03 01:25:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177598 to 155482. [2023-04-03 01:25:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155482 states, 108198 states have (on average 1.5741788203109115) internal successors, (170323), 127051 states have internal predecessors, (170323), 34055 states have call successors, (34055), 15988 states have call predecessors, (34055), 13228 states have return successors, (124767), 22069 states have call predecessors, (124767), 34051 states have call successors, (124767) [2023-04-03 01:25:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155482 states to 155482 states and 329145 transitions. [2023-04-03 01:25:08,991 INFO L78 Accepts]: Start accepts. Automaton has 155482 states and 329145 transitions. Word has length 248 [2023-04-03 01:25:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:08,992 INFO L495 AbstractCegarLoop]: Abstraction has 155482 states and 329145 transitions. [2023-04-03 01:25:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:25:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 155482 states and 329145 transitions. [2023-04-03 01:25:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-03 01:25:09,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:09,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:25:09,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:25:09,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:09,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:09,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2135450376, now seen corresponding path program 1 times [2023-04-03 01:25:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:09,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602791301] [2023-04-03 01:25:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-04-03 01:25:09,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602791301] [2023-04-03 01:25:09,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602791301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851224757] [2023-04-03 01:25:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:09,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:09,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:25:09,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:25:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:09,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:25:09,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-03 01:25:10,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:25:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851224757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:10,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:25:10,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:25:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505012314] [2023-04-03 01:25:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:25:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:25:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:25:10,037 INFO L87 Difference]: Start difference. First operand 155482 states and 329145 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:25:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:31,827 INFO L93 Difference]: Finished difference Result 318617 states and 719748 transitions. [2023-04-03 01:25:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:25:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 248 [2023-04-03 01:25:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:34,599 INFO L225 Difference]: With dead ends: 318617 [2023-04-03 01:25:34,600 INFO L226 Difference]: Without dead ends: 204619 [2023-04-03 01:25:37,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:25:37,324 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 151 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:37,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 581 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:25:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204619 states. [2023-04-03 01:25:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204619 to 204163. [2023-04-03 01:25:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204163 states, 142900 states have (on average 1.5741287613715884) internal successors, (224943), 168567 states have internal predecessors, (224943), 44409 states have call successors, (44409), 20370 states have call predecessors, (44409), 16853 states have return successors, (179511), 27695 states have call predecessors, (179511), 44405 states have call successors, (179511) [2023-04-03 01:26:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204163 states to 204163 states and 448863 transitions. [2023-04-03 01:26:04,007 INFO L78 Accepts]: Start accepts. Automaton has 204163 states and 448863 transitions. Word has length 248 [2023-04-03 01:26:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:26:04,008 INFO L495 AbstractCegarLoop]: Abstraction has 204163 states and 448863 transitions. [2023-04-03 01:26:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:26:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 204163 states and 448863 transitions. [2023-04-03 01:26:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-03 01:26:04,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:26:04,269 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:26:04,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:26:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:04,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:26:04,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:26:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1015272235, now seen corresponding path program 1 times [2023-04-03 01:26:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:26:04,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437674088] [2023-04-03 01:26:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:26:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-04-03 01:26:05,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:26:05,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437674088] [2023-04-03 01:26:05,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437674088] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:26:05,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404717794] [2023-04-03 01:26:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:26:05,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:26:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:26:05,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:26:05,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:26:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:26:05,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:26:05,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:26:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-03 01:26:05,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:26:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404717794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:26:05,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:26:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:26:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520461464] [2023-04-03 01:26:05,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:26:05,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:26:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:26:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:26:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:05,540 INFO L87 Difference]: Start difference. First operand 204163 states and 448863 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-03 01:26:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:26:32,407 INFO L93 Difference]: Finished difference Result 313846 states and 701982 transitions. [2023-04-03 01:26:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:26:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 253 [2023-04-03 01:26:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:26:35,129 INFO L225 Difference]: With dead ends: 313846 [2023-04-03 01:26:35,130 INFO L226 Difference]: Without dead ends: 244469 [2023-04-03 01:26:38,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:26:38,200 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 212 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:26:38,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 292 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:26:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244469 states.