/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 IntervalDomain -i ../sv-benchmarks/c/heap-data/packet_filter.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:56:12,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:56:12,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:56:12,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:56:12,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:56:12,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:56:12,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:56:12,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:56:12,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:56:12,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:56:12,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:56:12,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:56:12,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:56:12,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:56:12,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:56:12,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:56:12,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:56:12,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:56:12,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:56:12,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:56:12,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:56:12,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:56:12,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:56:12,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:56:12,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:56:12,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:56:12,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:56:12,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:56:12,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:56:12,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:56:12,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:56:12,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:56:12,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:56:12,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:56:12,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:56:12,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:56:12,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:56:12,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:56:12,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:56:12,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:56:12,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:56:12,671 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 [2023-03-31 22:56:12,698 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:56:12,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:56:12,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:56:12,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:56:12,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:56:12,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:56:12,699 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:56:12,699 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:56:12,699 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:56:12,700 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:56:12,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:56:12,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:56:12,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:56:12,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:56:12,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:12,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:56:12,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:56:12,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:56:12,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:56:12,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:56:12,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:56:12,937 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:56:12,937 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:56:12,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/packet_filter.i [2023-03-31 22:56:13,994 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:56:14,163 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:56:14,164 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i [2023-03-31 22:56:14,173 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0165c6317/c90db6bfed9440e7a923042f24554898/FLAG9c7ced64d [2023-03-31 22:56:14,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0165c6317/c90db6bfed9440e7a923042f24554898 [2023-03-31 22:56:14,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:56:14,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:56:14,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:14,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:56:14,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:56:14,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5d21bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14, skipping insertion in model container [2023-03-31 22:56:14,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:56:14,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:56:14,420 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/heap-data/packet_filter.i[23925,23938] [2023-03-31 22:56:14,430 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/heap-data/packet_filter.i[24159,24172] [2023-03-31 22:56:14,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:14,448 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:56:14,475 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/heap-data/packet_filter.i[23925,23938] [2023-03-31 22:56:14,477 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/heap-data/packet_filter.i[24159,24172] [2023-03-31 22:56:14,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:14,502 WARN L667 CHandler]: The function __VERIFIER_nondet_charp is called, but not defined or handled by StandardFunctionHandler. [2023-03-31 22:56:14,507 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:56:14,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14 WrapperNode [2023-03-31 22:56:14,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:14,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:56:14,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:56:14,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:56:14,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,546 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:56:14,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:56:14,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:56:14,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:56:14,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (1/1) ... [2023-03-31 22:56:14,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:14,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:14,575 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) [2023-03-31 22:56:14,577 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 [2023-03-31 22:56:14,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:56:14,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:56:14,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:56:14,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:56:14,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure receive [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure process_prio_queue [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure process_normal_queue [2023-03-31 22:56:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:56:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:56:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:56:14,607 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:56:14,608 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:56:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:56:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:56:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:56:14,609 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:56:14,610 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:56:14,611 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:56:14,612 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:56:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:56:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure receive [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure send [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure process_prio_queue [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure process_normal_queue [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:56:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:56:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:56:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:56:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:56:14,818 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:56:14,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:56:15,074 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:56:15,125 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:56:15,126 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:56:15,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:15 BoogieIcfgContainer [2023-03-31 22:56:15,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:56:15,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:56:15,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:56:15,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:56:15,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:56:14" (1/3) ... [2023-03-31 22:56:15,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44024eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:15, skipping insertion in model container [2023-03-31 22:56:15,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:14" (2/3) ... [2023-03-31 22:56:15,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44024eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:15, skipping insertion in model container [2023-03-31 22:56:15,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:15" (3/3) ... [2023-03-31 22:56:15,138 INFO L112 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2023-03-31 22:56:15,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:56:15,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-03-31 22:56:15,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:56:15,244 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;@348becce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:56:15,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-03-31 22:56:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 22:56:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 22:56:15,254 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:15,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:15,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:15,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1105903737, now seen corresponding path program 1 times [2023-03-31 22:56:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:15,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709315122] [2023-03-31 22:56:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:15,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709315122] [2023-03-31 22:56:15,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709315122] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:15,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:15,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:56:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663421615] [2023-03-31 22:56:15,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:56:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:56:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:15,426 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:56:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:15,484 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-03-31 22:56:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:56:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 22:56:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:15,491 INFO L225 Difference]: With dead ends: 79 [2023-03-31 22:56:15,491 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 22:56:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:15,496 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:15,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:56:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 22:56:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-03-31 22:56:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:56:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-03-31 22:56:15,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 12 [2023-03-31 22:56:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:15,530 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-03-31 22:56:15,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:56:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-03-31 22:56:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 22:56:15,533 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:15,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:15,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:56:15,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:15,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1394897449, now seen corresponding path program 1 times [2023-03-31 22:56:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:15,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664385186] [2023-03-31 22:56:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:15,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:15,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664385186] [2023-03-31 22:56:15,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664385186] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:15,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:15,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 22:56:15,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933531253] [2023-03-31 22:56:15,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:15,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:56:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:56:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:56:15,778 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:56:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:15,944 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2023-03-31 22:56:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:56:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 22:56:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:15,946 INFO L225 Difference]: With dead ends: 75 [2023-03-31 22:56:15,946 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 22:56:15,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:56:15,947 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:15,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 193 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:56:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 22:56:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-03-31 22:56:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 22:56:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-03-31 22:56:15,955 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 13 [2023-03-31 22:56:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:15,955 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-03-31 22:56:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:56:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-03-31 22:56:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 22:56:15,956 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:15,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:15,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:56:15,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:15,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1872797766, now seen corresponding path program 1 times [2023-03-31 22:56:15,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:15,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654584954] [2023-03-31 22:56:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:16,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654584954] [2023-03-31 22:56:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654584954] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:16,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:16,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 22:56:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396159726] [2023-03-31 22:56:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:16,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 22:56:16,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 22:56:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:56:16,091 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:56:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:16,302 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-03-31 22:56:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:56:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-03-31 22:56:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:16,304 INFO L225 Difference]: With dead ends: 80 [2023-03-31 22:56:16,304 INFO L226 Difference]: Without dead ends: 62 [2023-03-31 22:56:16,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:56:16,305 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:16,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 191 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:56:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-31 22:56:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2023-03-31 22:56:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:56:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-03-31 22:56:16,311 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2023-03-31 22:56:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:16,311 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-03-31 22:56:16,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:56:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-03-31 22:56:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:56:16,312 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:16,312 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:56:16,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:16,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1471296298, now seen corresponding path program 1 times [2023-03-31 22:56:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:16,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229154480] [2023-03-31 22:56:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:16,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:16,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229154480] [2023-03-31 22:56:16,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229154480] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:16,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062518415] [2023-03-31 22:56:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:16,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:16,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:16,949 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) [2023-03-31 22:56:16,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:56:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:17,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-31 22:56:17,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:17,187 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 22:56:17,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 22:56:17,229 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 22:56:17,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-03-31 22:56:17,268 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_74 (Array Int Int)) (v_ArrVal_77 (Array Int Int)) (|v_receive_~#packet~0.base_10| Int)) (and (= (select |c_old(#valid)| |v_receive_~#packet~0.base_10|) 0) (= (store |c_old(#memory_$Pointer$.offset)| |v_receive_~#packet~0.base_10| v_ArrVal_77) |c_#memory_$Pointer$.offset|) (= (store |c_old(#memory_$Pointer$.base)| |v_receive_~#packet~0.base_10| v_ArrVal_74) |c_#memory_$Pointer$.base|))) is different from true [2023-03-31 22:56:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:17,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:56:17,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:17,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:56:17,300 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:56:17,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:56:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:17,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062518415] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346912514] [2023-03-31 22:56:17,497 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 22:56:17,498 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:17,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:17,503 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:17,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:17,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:17,948 INFO L197 IcfgInterpreter]: Interpreting procedure process_prio_queue with input of size 35 for LOIs [2023-03-31 22:56:17,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:18,001 INFO L197 IcfgInterpreter]: Interpreting procedure receive with input of size 23 for LOIs [2023-03-31 22:56:18,017 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:18,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '730#(and (= |old(#length)| |#length|) (or (not (= process_prio_queue_~node~1.offset 0)) (not (= process_prio_queue_~node~1.base 0))) (= |#memory_int| |old(#memory_int)|) (= process_prio_queue_~q.offset process_prio_queue_~node~1.offset) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (not (= (mod (select (select |#memory_int| process_prio_queue_~node~1.base) (+ process_prio_queue_~node~1.offset 4)) 4294967296) 1)) (<= 500 (mod (select (select |#memory_int| process_prio_queue_~node~1.base) process_prio_queue_~node~1.offset) 4294967296)) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= process_prio_queue_~q.base process_prio_queue_~node~1.base) (exists ((|v_main_~#prio_queue~0.base_BEFORE_CALL_6| Int)) (and (<= 0 |v_main_~#prio_queue~0.base_BEFORE_CALL_6|) (= (select (select |old(#memory_$Pointer$.base)| |v_main_~#prio_queue~0.base_BEFORE_CALL_6|) 0) |process_prio_queue_#in~q.base|) (= |process_prio_queue_#in~q.offset| (select (select |old(#memory_$Pointer$.offset)| |v_main_~#prio_queue~0.base_BEFORE_CALL_6|) 0)))) (= process_prio_queue_~q.base |process_prio_queue_#in~q.base|) (= |#NULL.offset| 0) (= |old(#valid)| |#valid|) (= |process_prio_queue_#in~q.offset| process_prio_queue_~q.offset) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:18,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:18,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:18,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2023-03-31 22:56:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477705528] [2023-03-31 22:56:18,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:18,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:56:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:56:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=510, Unknown=2, NotChecked=46, Total=650 [2023-03-31 22:56:18,553 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:56:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:19,463 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2023-03-31 22:56:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 22:56:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-03-31 22:56:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:19,465 INFO L225 Difference]: With dead ends: 115 [2023-03-31 22:56:19,465 INFO L226 Difference]: Without dead ends: 95 [2023-03-31 22:56:19,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=4, NotChecked=60, Total=1056 [2023-03-31 22:56:19,466 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:19,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 171 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 208 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2023-03-31 22:56:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-03-31 22:56:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2023-03-31 22:56:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 22:56:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-03-31 22:56:19,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 21 [2023-03-31 22:56:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:19,474 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-03-31 22:56:19,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:56:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-03-31 22:56:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:56:19,475 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:19,475 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:56:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:19,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:19,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1485444679, now seen corresponding path program 1 times [2023-03-31 22:56:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:19,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014764615] [2023-03-31 22:56:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:20,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014764615] [2023-03-31 22:56:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014764615] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288242956] [2023-03-31 22:56:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:20,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:20,160 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) [2023-03-31 22:56:20,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:56:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:20,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-31 22:56:20,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:20,297 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-03-31 22:56:20,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-03-31 22:56:20,335 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 22:56:20,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-03-31 22:56:20,355 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_receive_~#packet~0.base_19| Int) (v_ArrVal_148 (Array Int Int)) (v_ArrVal_147 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |v_receive_~#packet~0.base_19| v_ArrVal_147)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |v_receive_~#packet~0.base_19| v_ArrVal_148)) (= (select |c_old(#valid)| |v_receive_~#packet~0.base_19|) 0))) is different from true [2023-03-31 22:56:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:20,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:56:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:20,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:56:20,376 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:56:20,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:56:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:20,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:20,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288242956] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737171967] [2023-03-31 22:56:20,626 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 22:56:20,626 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:20,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:20,626 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:20,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:20,641 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:20,978 INFO L197 IcfgInterpreter]: Interpreting procedure process_normal_queue with input of size 35 for LOIs [2023-03-31 22:56:21,013 INFO L197 IcfgInterpreter]: Interpreting procedure process_prio_queue with input of size 35 for LOIs [2023-03-31 22:56:21,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:21,022 INFO L197 IcfgInterpreter]: Interpreting procedure receive with input of size 49 for LOIs [2023-03-31 22:56:21,035 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:22,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1144#(and (= |old(#length)| |#length|) (= |process_normal_queue_#in~q.base| process_normal_queue_~q.base) (= |#memory_int| |old(#memory_int)|) (= process_normal_queue_~node~2.offset process_normal_queue_~q.offset) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (or (not (= process_normal_queue_~node~2.base 0)) (not (= process_normal_queue_~node~2.offset 0))) (= process_normal_queue_~node~2.base process_normal_queue_~q.base) (exists ((|v_main_~#normal_queue~0.base_BEFORE_CALL_18| Int)) (and (= |process_normal_queue_#in~q.base| (select (select |old(#memory_$Pointer$.base)| |v_main_~#normal_queue~0.base_BEFORE_CALL_18|) 0)) (= (select (select |old(#memory_$Pointer$.offset)| |v_main_~#normal_queue~0.base_BEFORE_CALL_18|) 0) |process_normal_queue_#in~q.offset|) (<= 0 |v_main_~#normal_queue~0.base_BEFORE_CALL_18|))) (exists ((|v_process_normal_queue_#t~mem26_11| Int) (|v_process_normal_queue_#t~short27_10| Bool) (|v_process_normal_queue_#t~mem26_10| Int)) (and (or (and (= |v_process_normal_queue_#t~mem26_11| |v_process_normal_queue_#t~mem26_10|) (not |v_process_normal_queue_#t~short27_10|)) (and (= |v_process_normal_queue_#t~mem26_11| (select (select |#memory_int| process_normal_queue_~node~2.base) process_normal_queue_~node~2.offset)) |v_process_normal_queue_#t~short27_10| (< (mod |v_process_normal_queue_#t~mem26_11| 4294967296) 500))) (or (and |v_process_normal_queue_#t~short27_10| (= (mod (select (select |#memory_int| process_normal_queue_~node~2.base) (+ process_normal_queue_~node~2.offset 4)) 4294967296) 0)) (and (not (= (mod (select (select |#memory_int| process_normal_queue_~node~2.base) (+ process_normal_queue_~node~2.offset 4)) 4294967296) 0)) (not |v_process_normal_queue_#t~short27_10|))))) (= |#NULL.offset| 0) (= |process_normal_queue_#in~q.offset| process_normal_queue_~q.offset) (= |old(#valid)| |#valid|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:22,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:22,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-03-31 22:56:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480037824] [2023-03-31 22:56:22,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 22:56:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 22:56:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=965, Unknown=3, NotChecked=64, Total=1190 [2023-03-31 22:56:22,199 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:56:22,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:22,859 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2023-03-31 22:56:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:56:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-03-31 22:56:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:22,861 INFO L225 Difference]: With dead ends: 106 [2023-03-31 22:56:22,861 INFO L226 Difference]: Without dead ends: 88 [2023-03-31 22:56:22,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=1293, Unknown=3, NotChecked=74, Total=1560 [2023-03-31 22:56:22,862 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:22,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 173 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 207 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2023-03-31 22:56:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-03-31 22:56:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2023-03-31 22:56:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 22:56:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-03-31 22:56:22,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 26 [2023-03-31 22:56:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:22,868 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-03-31 22:56:22,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:56:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-03-31 22:56:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:56:22,869 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:22,869 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:56:22,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:23,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:23,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:23,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1721036824, now seen corresponding path program 1 times [2023-03-31 22:56:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957684593] [2023-03-31 22:56:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:23,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:23,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957684593] [2023-03-31 22:56:23,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957684593] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:23,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018256042] [2023-03-31 22:56:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:23,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:23,944 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) [2023-03-31 22:56:23,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:56:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 68 conjunts are in the unsatisfiable core [2023-03-31 22:56:24,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:24,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-03-31 22:56:24,249 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-03-31 22:56:24,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-03-31 22:56:24,279 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-31 22:56:24,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-31 22:56:24,323 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-31 22:56:24,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-31 22:56:24,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:24,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:24,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-03-31 22:56:24,408 INFO L321 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2023-03-31 22:56:24,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-03-31 22:56:24,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:24,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:56:24,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:56:24,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-03-31 22:56:24,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:56:24,621 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-03-31 22:56:24,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 48 [2023-03-31 22:56:24,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-03-31 22:56:24,945 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:24,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2023-03-31 22:56:24,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-03-31 22:56:24,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:56:24,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-03-31 22:56:25,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:25,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-03-31 22:56:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:25,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:25,534 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-03-31 22:56:25,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 91 [2023-03-31 22:56:25,549 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-03-31 22:56:25,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 77 [2023-03-31 22:56:25,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-03-31 22:56:25,664 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-03-31 22:56:25,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 1 [2023-03-31 22:56:25,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-03-31 22:56:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018256042] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648996753] [2023-03-31 22:56:25,782 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 22:56:25,782 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:25,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:25,782 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:25,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:25,793 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:26,245 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_queue with input of size 54 for LOIs [2023-03-31 22:56:26,264 INFO L197 IcfgInterpreter]: Interpreting procedure process_prio_queue with input of size 35 for LOIs [2023-03-31 22:56:26,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:26,292 INFO L197 IcfgInterpreter]: Interpreting procedure receive with input of size 49 for LOIs [2023-03-31 22:56:26,326 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:29,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1588#(and (= |old(#length)| |#length|) (or (not (= process_prio_queue_~node~1.offset 0)) (not (= process_prio_queue_~node~1.base 0))) (= |#memory_int| |old(#memory_int)|) (= process_prio_queue_~q.offset process_prio_queue_~node~1.offset) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (not (= (mod (select (select |#memory_int| process_prio_queue_~node~1.base) (+ process_prio_queue_~node~1.offset 4)) 4294967296) 1)) (exists ((|v_main_~#prio_queue~0.base_BEFORE_CALL_33| Int)) (and (= |process_prio_queue_#in~q.base| (select (select |old(#memory_$Pointer$.base)| |v_main_~#prio_queue~0.base_BEFORE_CALL_33|) 0)) (= |process_prio_queue_#in~q.offset| (select (select |old(#memory_$Pointer$.offset)| |v_main_~#prio_queue~0.base_BEFORE_CALL_33|) 0)) (<= 0 |v_main_~#prio_queue~0.base_BEFORE_CALL_33|))) (<= 500 (mod (select (select |#memory_int| process_prio_queue_~node~1.base) process_prio_queue_~node~1.offset) 4294967296)) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= process_prio_queue_~q.base process_prio_queue_~node~1.base) (= process_prio_queue_~q.base |process_prio_queue_#in~q.base|) (= |#NULL.offset| 0) (= |old(#valid)| |#valid|) (= |process_prio_queue_#in~q.offset| process_prio_queue_~q.offset) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:29,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:29,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 32 [2023-03-31 22:56:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600508808] [2023-03-31 22:56:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-31 22:56:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-31 22:56:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2448, Unknown=4, NotChecked=0, Total=2652 [2023-03-31 22:56:29,521 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 32 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 27 states have internal predecessors, (47), 10 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:56:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:30,775 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-03-31 22:56:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 22:56:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 27 states have internal predecessors, (47), 10 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2023-03-31 22:56:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:30,777 INFO L225 Difference]: With dead ends: 70 [2023-03-31 22:56:30,777 INFO L226 Difference]: Without dead ends: 68 [2023-03-31 22:56:30,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=308, Invalid=3470, Unknown=4, NotChecked=0, Total=3782 [2023-03-31 22:56:30,778 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:30,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 440 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 22:56:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-03-31 22:56:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2023-03-31 22:56:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2023-03-31 22:56:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-03-31 22:56:30,784 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 26 [2023-03-31 22:56:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-03-31 22:56:30,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 27 states have internal predecessors, (47), 10 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:56:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-03-31 22:56:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:56:30,785 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:30,785 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:56:30,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 22:56:30,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:30,990 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:30,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash 826318219, now seen corresponding path program 1 times [2023-03-31 22:56:30,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:30,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199282422] [2023-03-31 22:56:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:31,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:31,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199282422] [2023-03-31 22:56:31,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199282422] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:31,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379888794] [2023-03-31 22:56:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:31,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:31,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:31,620 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) [2023-03-31 22:56:31,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:56:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:31,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 66 conjunts are in the unsatisfiable core [2023-03-31 22:56:31,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:31,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-03-31 22:56:31,900 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-03-31 22:56:31,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-03-31 22:56:31,926 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-31 22:56:31,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-31 22:56:31,950 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-31 22:56:31,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-31 22:56:31,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:31,989 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-03-31 22:56:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2023-03-31 22:56:32,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:32,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:56:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-03-31 22:56:32,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:56:32,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-03-31 22:56:32,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:56:32,146 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-03-31 22:56:32,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 42 [2023-03-31 22:56:32,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-03-31 22:56:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-03-31 22:56:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:56:32,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-03-31 22:56:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:32,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:32,678 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-03-31 22:56:32,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-03-31 22:56:32,685 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:32,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-03-31 22:56:32,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-03-31 22:56:32,775 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-03-31 22:56:32,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-03-31 22:56:32,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-03-31 22:56:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:32,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379888794] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:32,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895601107] [2023-03-31 22:56:32,896 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-03-31 22:56:32,896 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:32,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:32,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:32,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:32,906 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:33,352 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_queue with input of size 57 for LOIs [2023-03-31 22:56:33,366 INFO L197 IcfgInterpreter]: Interpreting procedure process_prio_queue with input of size 35 for LOIs [2023-03-31 22:56:33,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:33,395 INFO L197 IcfgInterpreter]: Interpreting procedure receive with input of size 49 for LOIs [2023-03-31 22:56:33,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:36,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2007#(and (= |old(#length)| |#length|) (exists ((|v_main_~#prio_queue~0.base_BEFORE_CALL_50| Int)) (and (<= 0 |v_main_~#prio_queue~0.base_BEFORE_CALL_50|) (= |process_prio_queue_#in~q.offset| (select (select |old(#memory_$Pointer$.offset)| |v_main_~#prio_queue~0.base_BEFORE_CALL_50|) 0)) (= |process_prio_queue_#in~q.base| (select (select |old(#memory_$Pointer$.base)| |v_main_~#prio_queue~0.base_BEFORE_CALL_50|) 0)))) (or (not (= process_prio_queue_~node~1.offset 0)) (not (= process_prio_queue_~node~1.base 0))) (= |#memory_int| |old(#memory_int)|) (= process_prio_queue_~q.offset process_prio_queue_~node~1.offset) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (not (= (mod (select (select |#memory_int| process_prio_queue_~node~1.base) (+ process_prio_queue_~node~1.offset 4)) 4294967296) 1)) (<= 500 (mod (select (select |#memory_int| process_prio_queue_~node~1.base) process_prio_queue_~node~1.offset) 4294967296)) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= process_prio_queue_~q.base process_prio_queue_~node~1.base) (= process_prio_queue_~q.base |process_prio_queue_#in~q.base|) (= |#NULL.offset| 0) (= |old(#valid)| |#valid|) (= |process_prio_queue_#in~q.offset| process_prio_queue_~q.offset) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:36,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:36,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:36,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 31 [2023-03-31 22:56:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997707319] [2023-03-31 22:56:36,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-31 22:56:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-31 22:56:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2450, Unknown=1, NotChecked=0, Total=2652 [2023-03-31 22:56:36,731 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 31 states, 22 states have (on average 2.227272727272727) internal successors, (49), 27 states have internal predecessors, (49), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:56:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:37,764 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2023-03-31 22:56:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 22:56:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 22 states have (on average 2.227272727272727) internal successors, (49), 27 states have internal predecessors, (49), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 27 [2023-03-31 22:56:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:37,765 INFO L225 Difference]: With dead ends: 79 [2023-03-31 22:56:37,765 INFO L226 Difference]: Without dead ends: 77 [2023-03-31 22:56:37,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=327, Invalid=3704, Unknown=1, NotChecked=0, Total=4032 [2023-03-31 22:56:37,767 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:37,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 434 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 22:56:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-03-31 22:56:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2023-03-31 22:56:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2023-03-31 22:56:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-03-31 22:56:37,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 27 [2023-03-31 22:56:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:37,796 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-03-31 22:56:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 22 states have (on average 2.227272727272727) internal successors, (49), 27 states have internal predecessors, (49), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:56:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-03-31 22:56:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:56:37,797 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:37,797 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:56:37,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:37,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:37,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION === [process_prio_queueErr0ASSERT_VIOLATIONERROR_FUNCTION, process_normal_queueErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:38,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1867711737, now seen corresponding path program 1 times [2023-03-31 22:56:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132510541] [2023-03-31 22:56:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:01,827 WARN L223 SmtUtils]: Spent 10.26s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 22:57:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:01,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132510541] [2023-03-31 22:57:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132510541] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65445561] [2023-03-31 22:57:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:01,942 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) [2023-03-31 22:57:01,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:57:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:02,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 83 conjunts are in the unsatisfiable core [2023-03-31 22:57:02,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:02,172 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-03-31 22:57:02,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 22:57:02,240 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 22:57:02,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-03-31 22:57:02,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:57:02,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:57:02,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:57:02,271 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_receive_~#packet~0.base_38| Int) (v_ArrVal_831 (Array Int Int)) (v_ArrVal_833 (Array Int Int)) (v_ArrVal_836 Int)) (and (= (store |c_old(#memory_$Pointer$.offset)| |v_receive_~#packet~0.base_38| v_ArrVal_833) |c_#memory_$Pointer$.offset|) (= |c_#valid| (store |c_old(#valid)| |v_receive_~#packet~0.base_38| v_ArrVal_836)) (= (store |c_old(#memory_$Pointer$.base)| |v_receive_~#packet~0.base_38| v_ArrVal_831) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |v_receive_~#packet~0.base_38|) 0))) is different from true [2023-03-31 22:57:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:57:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:57:02,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-03-31 22:57:02,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-03-31 22:57:02,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:57:02,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:57:02,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:57:02,380 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_842 (Array Int Int)) (v_ArrVal_853 (Array Int Int)) (v_ArrVal_846 (Array Int Int)) (v_ArrVal_839 (Array Int Int)) (|v_append_to_queue_~#p.base_30| Int) (append_to_queue_~node~0.base Int) (v_ArrVal_852 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (and (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_30| v_ArrVal_842))) (store (store .cse0 append_to_queue_~node~0.base v_ArrVal_839) |c_append_to_queue_#in~q.base| (store (select (store .cse0 append_to_queue_~node~0.base v_ArrVal_852) |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| 0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_30| v_ArrVal_846) append_to_queue_~node~0.base v_ArrVal_851) |c_append_to_queue_#in~q.base| v_ArrVal_853)) (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_30|) 0) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|))) is different from true [2023-03-31 22:57:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,418 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-03-31 22:57:02,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 37 [2023-03-31 22:57:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,517 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-03-31 22:57:02,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 249 [2023-03-31 22:57:02,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:57:02,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:57:02,561 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:57:02,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:57:02,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:57:02,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:57:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:57:02,692 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:57:02,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2023-03-31 22:57:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:57:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:57:02,760 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-03-31 22:57:02,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 104 [2023-03-31 22:57:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:57:02,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:57:02,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 16 [2023-03-31 22:57:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:03,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65445561] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455185613] [2023-03-31 22:57:07,488 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-03-31 22:57:07,488 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:07,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:07,488 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:07,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:07,501 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:57:07,960 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_queue with input of size 56 for LOIs [2023-03-31 22:57:07,979 INFO L197 IcfgInterpreter]: Interpreting procedure process_prio_queue with input of size 35 for LOIs [2023-03-31 22:57:08,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:08,015 INFO L197 IcfgInterpreter]: Interpreting procedure receive with input of size 49 for LOIs [2023-03-31 22:57:08,026 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:11,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2382#(and (= |old(#length)| |#length|) (or (not (= process_prio_queue_~node~1.offset 0)) (not (= process_prio_queue_~node~1.base 0))) (= |#memory_int| |old(#memory_int)|) (= process_prio_queue_~q.offset process_prio_queue_~node~1.offset) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (not (= (mod (select (select |#memory_int| process_prio_queue_~node~1.base) (+ process_prio_queue_~node~1.offset 4)) 4294967296) 1)) (<= 500 (mod (select (select |#memory_int| process_prio_queue_~node~1.base) process_prio_queue_~node~1.offset) 4294967296)) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= process_prio_queue_~q.base process_prio_queue_~node~1.base) (= process_prio_queue_~q.base |process_prio_queue_#in~q.base|) (= |#NULL.offset| 0) (= |old(#valid)| |#valid|) (= |process_prio_queue_#in~q.offset| process_prio_queue_~q.offset) (<= 0 |#StackHeapBarrier|) (exists ((|v_main_~#prio_queue~0.base_BEFORE_CALL_65| Int)) (and (= (select (select |old(#memory_$Pointer$.base)| |v_main_~#prio_queue~0.base_BEFORE_CALL_65|) 0) |process_prio_queue_#in~q.base|) (= |process_prio_queue_#in~q.offset| (select (select |old(#memory_$Pointer$.offset)| |v_main_~#prio_queue~0.base_BEFORE_CALL_65|) 0)) (<= 0 |v_main_~#prio_queue~0.base_BEFORE_CALL_65|))) (= |#NULL.base| 0))' at error location [2023-03-31 22:57:11,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:11,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:57:11,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2023-03-31 22:57:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952350781] [2023-03-31 22:57:11,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 22:57:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 22:57:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1111, Unknown=2, NotChecked=138, Total=1406 [2023-03-31 22:57:11,078 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 16 states, 10 states have (on average 3.3) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5)