/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/token_ring.03.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:23:05,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:23:05,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:23:05,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:23:05,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:23:05,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:23:05,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:23:05,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:23:05,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:23:05,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:23:05,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:23:05,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:23:05,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:23:05,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:23:05,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:23:05,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:23:05,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:23:05,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:23:05,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:23:05,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:23:05,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:23:05,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:23:05,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:23:05,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:23:05,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:23:05,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:23:05,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:23:05,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:23:05,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:23:05,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:23:05,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:23:05,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:23:05,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:23:05,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:23:05,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:23:05,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:23:05,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:23:05,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:23:05,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:23:05,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:23:05,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:23:05,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:23:05,644 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:23:05,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:23:05,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:23:05,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:23:05,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:23:05,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:23:05,645 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:23:05,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:23:05,645 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:23:05,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:23:05,645 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:23:05,646 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:23:05,646 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:23:05,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:23:05,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:23:05,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:23:05,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:05,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:23:05,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:23:05,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:23:05,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:23:05,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:23:05,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:23:05,903 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:23:05,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2023-04-03 01:23:07,036 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:23:07,234 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:23:07,235 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2023-04-03 01:23:07,245 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fa071d2/d035bec4e092422ea4f5bd7261bd1720/FLAG80ae43530 [2023-04-03 01:23:07,260 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fa071d2/d035bec4e092422ea4f5bd7261bd1720 [2023-04-03 01:23:07,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:23:07,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:23:07,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:07,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:23:07,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:23:07,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5106afd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07, skipping insertion in model container [2023-04-03 01:23:07,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:23:07,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:23:07,431 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2023-04-03 01:23:07,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:07,491 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:23:07,500 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2023-04-03 01:23:07,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:23:07,542 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:23:07,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07 WrapperNode [2023-04-03 01:23:07,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:23:07,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:23:07,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:23:07,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:23:07,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:23:07,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:23:07,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:23:07,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:23:07,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (1/1) ... [2023-04-03 01:23:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:23:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:07,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:23:07,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:23:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:23:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:23:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:23:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:23:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:23:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:23:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:23:07,671 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:23:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:23:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:23:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:23:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:23:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:23:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:23:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:23:07,740 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:23:07,742 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:23:08,305 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:23:08,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:23:08,538 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-03 01:23:08,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:08 BoogieIcfgContainer [2023-04-03 01:23:08,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:23:08,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:23:08,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:23:08,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:23:08,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:23:07" (1/3) ... [2023-04-03 01:23:08,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d871b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:08, skipping insertion in model container [2023-04-03 01:23:08,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:23:07" (2/3) ... [2023-04-03 01:23:08,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d871b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:23:08, skipping insertion in model container [2023-04-03 01:23:08,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:23:08" (3/3) ... [2023-04-03 01:23:08,551 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-1.c [2023-04-03 01:23:08,567 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:23:08,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:23:08,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:23:08,628 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;@2956cf7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:23:08,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:23:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 85 states have (on average 1.411764705882353) internal successors, (120), 94 states have internal predecessors, (120), 36 states have call successors, (36), 24 states have call predecessors, (36), 24 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-03 01:23:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 01:23:08,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:08,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:08,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:08,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash 408379926, now seen corresponding path program 1 times [2023-04-03 01:23:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:08,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512181728] [2023-04-03 01:23:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:09,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512181728] [2023-04-03 01:23:09,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512181728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:09,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:09,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:23:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764851024] [2023-04-03 01:23:09,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:23:09,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:23:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:23:09,235 INFO L87 Difference]: Start difference. First operand has 147 states, 85 states have (on average 1.411764705882353) internal successors, (120), 94 states have internal predecessors, (120), 36 states have call successors, (36), 24 states have call predecessors, (36), 24 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-03 01:23:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:09,681 INFO L93 Difference]: Finished difference Result 394 states and 545 transitions. [2023-04-03 01:23:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:23:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2023-04-03 01:23:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:09,700 INFO L225 Difference]: With dead ends: 394 [2023-04-03 01:23:09,701 INFO L226 Difference]: Without dead ends: 251 [2023-04-03 01:23:09,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:23:09,713 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 307 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:09,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 429 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:23:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-03 01:23:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2023-04-03 01:23:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 162 states have internal predecessors, (199), 61 states have call successors, (61), 42 states have call predecessors, (61), 38 states have return successors, (58), 55 states have call predecessors, (58), 57 states have call successors, (58) [2023-04-03 01:23:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2023-04-03 01:23:09,797 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 71 [2023-04-03 01:23:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:09,797 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2023-04-03 01:23:09,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-03 01:23:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2023-04-03 01:23:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 01:23:09,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:09,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:23:09,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:09,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1657611597, now seen corresponding path program 1 times [2023-04-03 01:23:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983693132] [2023-04-03 01:23:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:23:10,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983693132] [2023-04-03 01:23:10,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983693132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:10,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:10,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:23:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072123837] [2023-04-03 01:23:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:23:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:23:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:23:10,488 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-03 01:23:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:11,310 INFO L93 Difference]: Finished difference Result 845 states and 1153 transitions. [2023-04-03 01:23:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:23:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 123 [2023-04-03 01:23:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:11,316 INFO L225 Difference]: With dead ends: 845 [2023-04-03 01:23:11,317 INFO L226 Difference]: Without dead ends: 612 [2023-04-03 01:23:11,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:23:11,319 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 488 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 739 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:23:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-04-03 01:23:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 530. [2023-04-03 01:23:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 326 states have (on average 1.3251533742331287) internal successors, (432), 356 states have internal predecessors, (432), 119 states have call successors, (119), 76 states have call predecessors, (119), 84 states have return successors, (154), 119 states have call predecessors, (154), 115 states have call successors, (154) [2023-04-03 01:23:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 705 transitions. [2023-04-03 01:23:11,438 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 705 transitions. Word has length 123 [2023-04-03 01:23:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:11,440 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 705 transitions. [2023-04-03 01:23:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-03 01:23:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 705 transitions. [2023-04-03 01:23:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 01:23:11,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:11,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:11,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:23:11,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:11,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:11,450 INFO L85 PathProgramCache]: Analyzing trace with hash 744458998, now seen corresponding path program 1 times [2023-04-03 01:23:11,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:11,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904171975] [2023-04-03 01:23:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:23:11,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904171975] [2023-04-03 01:23:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904171975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:11,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:23:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958074262] [2023-04-03 01:23:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:11,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:11,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:23:11,603 INFO L87 Difference]: Start difference. First operand 530 states and 705 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:23:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:11,712 INFO L93 Difference]: Finished difference Result 910 states and 1249 transitions. [2023-04-03 01:23:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 124 [2023-04-03 01:23:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:11,717 INFO L225 Difference]: With dead ends: 910 [2023-04-03 01:23:11,717 INFO L226 Difference]: Without dead ends: 641 [2023-04-03 01:23:11,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:23:11,719 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 57 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:11,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 365 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-04-03 01:23:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 592. [2023-04-03 01:23:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 371 states have (on average 1.3611859838274933) internal successors, (505), 408 states have internal predecessors, (505), 129 states have call successors, (129), 83 states have call predecessors, (129), 91 states have return successors, (175), 129 states have call predecessors, (175), 125 states have call successors, (175) [2023-04-03 01:23:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 809 transitions. [2023-04-03 01:23:11,774 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 809 transitions. Word has length 124 [2023-04-03 01:23:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:11,775 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 809 transitions. [2023-04-03 01:23:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:23:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 809 transitions. [2023-04-03 01:23:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-03 01:23:11,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:11,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:11,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:23:11,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:11,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1370575387, now seen corresponding path program 1 times [2023-04-03 01:23:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:11,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276034345] [2023-04-03 01:23:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:23:12,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:12,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276034345] [2023-04-03 01:23:12,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276034345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:12,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:12,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752090116] [2023-04-03 01:23:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:12,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:12,036 INFO L87 Difference]: Start difference. First operand 592 states and 809 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:12,758 INFO L93 Difference]: Finished difference Result 2406 states and 3768 transitions. [2023-04-03 01:23:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:12,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 169 [2023-04-03 01:23:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:12,805 INFO L225 Difference]: With dead ends: 2406 [2023-04-03 01:23:12,805 INFO L226 Difference]: Without dead ends: 1830 [2023-04-03 01:23:12,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:12,816 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 402 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:12,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 271 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:23:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2023-04-03 01:23:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1798. [2023-04-03 01:23:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1179 states have (on average 1.4189991518235794) internal successors, (1673), 1334 states have internal predecessors, (1673), 385 states have call successors, (385), 209 states have call predecessors, (385), 233 states have return successors, (730), 356 states have call predecessors, (730), 381 states have call successors, (730) [2023-04-03 01:23:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2788 transitions. [2023-04-03 01:23:13,017 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2788 transitions. Word has length 169 [2023-04-03 01:23:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:13,019 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2788 transitions. [2023-04-03 01:23:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2788 transitions. [2023-04-03 01:23:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-03 01:23:13,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:13,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:23:13,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:13,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -782532641, now seen corresponding path program 1 times [2023-04-03 01:23:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568154784] [2023-04-03 01:23:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:23:13,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:13,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568154784] [2023-04-03 01:23:13,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568154784] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:13,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:13,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31328251] [2023-04-03 01:23:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:13,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:13,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:13,259 INFO L87 Difference]: Start difference. First operand 1798 states and 2788 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:14,338 INFO L93 Difference]: Finished difference Result 7896 states and 14370 transitions. [2023-04-03 01:23:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 169 [2023-04-03 01:23:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:14,390 INFO L225 Difference]: With dead ends: 7896 [2023-04-03 01:23:14,390 INFO L226 Difference]: Without dead ends: 6114 [2023-04-03 01:23:14,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:14,452 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 400 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:14,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 281 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:23:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6114 states. [2023-04-03 01:23:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6114 to 6036. [2023-04-03 01:23:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6036 states, 4079 states have (on average 1.4770777151262564) internal successors, (6025), 4762 states have internal predecessors, (6025), 1341 states have call successors, (1341), 559 states have call predecessors, (1341), 615 states have return successors, (3457), 1061 states have call predecessors, (3457), 1337 states have call successors, (3457) [2023-04-03 01:23:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6036 states to 6036 states and 10823 transitions. [2023-04-03 01:23:15,085 INFO L78 Accepts]: Start accepts. Automaton has 6036 states and 10823 transitions. Word has length 169 [2023-04-03 01:23:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 6036 states and 10823 transitions. [2023-04-03 01:23:15,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-03 01:23:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6036 states and 10823 transitions. [2023-04-03 01:23:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 01:23:15,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:15,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:23:15,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:15,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1259162836, now seen corresponding path program 1 times [2023-04-03 01:23:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026031766] [2023-04-03 01:23:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:23:15,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:15,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026031766] [2023-04-03 01:23:15,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026031766] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:15,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:15,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:23:15,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502362839] [2023-04-03 01:23:15,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:15,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:23:15,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:23:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:15,357 INFO L87 Difference]: Start difference. First operand 6036 states and 10823 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-03 01:23:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:17,114 INFO L93 Difference]: Finished difference Result 21835 states and 43887 transitions. [2023-04-03 01:23:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:23:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 164 [2023-04-03 01:23:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:17,269 INFO L225 Difference]: With dead ends: 21835 [2023-04-03 01:23:17,270 INFO L226 Difference]: Without dead ends: 15815 [2023-04-03 01:23:17,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:23:17,382 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 399 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:17,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 356 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:23:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2023-04-03 01:23:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 14678. [2023-04-03 01:23:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14678 states, 10079 states have (on average 1.5105665244567914) internal successors, (15225), 12071 states have internal predecessors, (15225), 3413 states have call successors, (3413), 1180 states have call predecessors, (3413), 1185 states have return successors, (9556), 2366 states have call predecessors, (9556), 3409 states have call successors, (9556) [2023-04-03 01:23:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14678 states to 14678 states and 28194 transitions. [2023-04-03 01:23:19,042 INFO L78 Accepts]: Start accepts. Automaton has 14678 states and 28194 transitions. Word has length 164 [2023-04-03 01:23:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:19,043 INFO L495 AbstractCegarLoop]: Abstraction has 14678 states and 28194 transitions. [2023-04-03 01:23:19,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-03 01:23:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 14678 states and 28194 transitions. [2023-04-03 01:23:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-03 01:23:19,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:19,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:19,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:23:19,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:19,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 20974184, now seen corresponding path program 1 times [2023-04-03 01:23:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346352475] [2023-04-03 01:23:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-03 01:23:19,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346352475] [2023-04-03 01:23:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346352475] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280362428] [2023-04-03 01:23:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:19,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:19,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:19,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:23:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:19,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:19,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:23:19,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280362428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:19,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999415413] [2023-04-03 01:23:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:19,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:19,680 INFO L87 Difference]: Start difference. First operand 14678 states and 28194 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:21,176 INFO L93 Difference]: Finished difference Result 28671 states and 56832 transitions. [2023-04-03 01:23:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 179 [2023-04-03 01:23:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:21,313 INFO L225 Difference]: With dead ends: 28671 [2023-04-03 01:23:21,314 INFO L226 Difference]: Without dead ends: 16231 [2023-04-03 01:23:21,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:21,416 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 77 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:21,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 361 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16231 states. [2023-04-03 01:23:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16231 to 16191. [2023-04-03 01:23:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16191 states, 11145 states have (on average 1.499416778824585) internal successors, (16711), 13336 states have internal predecessors, (16711), 3712 states have call successors, (3712), 1313 states have call predecessors, (3712), 1333 states have return successors, (11106), 2578 states have call predecessors, (11106), 3708 states have call successors, (11106) [2023-04-03 01:23:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16191 states to 16191 states and 31529 transitions. [2023-04-03 01:23:23,150 INFO L78 Accepts]: Start accepts. Automaton has 16191 states and 31529 transitions. Word has length 179 [2023-04-03 01:23:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:23,150 INFO L495 AbstractCegarLoop]: Abstraction has 16191 states and 31529 transitions. [2023-04-03 01:23:23,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16191 states and 31529 transitions. [2023-04-03 01:23:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-03 01:23:23,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:23,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:23,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:23,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:23,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1145652963, now seen corresponding path program 1 times [2023-04-03 01:23:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:23,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788703404] [2023-04-03 01:23:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-03 01:23:23,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788703404] [2023-04-03 01:23:23,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788703404] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:23,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352157861] [2023-04-03 01:23:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:23,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:23,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:23:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:23,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:23,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:23:23,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352157861] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:23,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167955088] [2023-04-03 01:23:23,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:23,832 INFO L87 Difference]: Start difference. First operand 16191 states and 31529 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:25,439 INFO L93 Difference]: Finished difference Result 32497 states and 65373 transitions. [2023-04-03 01:23:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:25,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 181 [2023-04-03 01:23:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:25,584 INFO L225 Difference]: With dead ends: 32497 [2023-04-03 01:23:25,584 INFO L226 Difference]: Without dead ends: 20185 [2023-04-03 01:23:25,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:25,679 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 96 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:25,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 403 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20185 states. [2023-04-03 01:23:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20185 to 20101. [2023-04-03 01:23:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20101 states, 13998 states have (on average 1.464423489069867) internal successors, (20499), 16581 states have internal predecessors, (20499), 4414 states have call successors, (4414), 1636 states have call predecessors, (4414), 1688 states have return successors, (14221), 3083 states have call predecessors, (14221), 4410 states have call successors, (14221) [2023-04-03 01:23:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20101 states to 20101 states and 39134 transitions. [2023-04-03 01:23:27,752 INFO L78 Accepts]: Start accepts. Automaton has 20101 states and 39134 transitions. Word has length 181 [2023-04-03 01:23:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:27,752 INFO L495 AbstractCegarLoop]: Abstraction has 20101 states and 39134 transitions. [2023-04-03 01:23:27,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20101 states and 39134 transitions. [2023-04-03 01:23:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-03 01:23:27,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:27,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:27,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 01:23:27,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-03 01:23:27,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:27,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:27,986 INFO L85 PathProgramCache]: Analyzing trace with hash 18551507, now seen corresponding path program 1 times [2023-04-03 01:23:27,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:27,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111701398] [2023-04-03 01:23:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-03 01:23:28,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:28,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111701398] [2023-04-03 01:23:28,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111701398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:28,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129311752] [2023-04-03 01:23:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:28,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:28,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:23:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:28,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:28,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:23:28,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:28,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129311752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:28,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-03 01:23:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706548167] [2023-04-03 01:23:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:28,445 INFO L87 Difference]: Start difference. First operand 20101 states and 39134 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:30,435 INFO L93 Difference]: Finished difference Result 39742 states and 79656 transitions. [2023-04-03 01:23:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 181 [2023-04-03 01:23:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:30,611 INFO L225 Difference]: With dead ends: 39742 [2023-04-03 01:23:30,611 INFO L226 Difference]: Without dead ends: 24239 [2023-04-03 01:23:30,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:23:30,736 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 86 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:30,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 395 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24239 states. [2023-04-03 01:23:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24239 to 24046. [2023-04-03 01:23:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 16965 states have (on average 1.4215148835838491) internal successors, (24116), 19823 states have internal predecessors, (24116), 4993 states have call successors, (4993), 1962 states have call predecessors, (4993), 2087 states have return successors, (17085), 3620 states have call predecessors, (17085), 4989 states have call successors, (17085) [2023-04-03 01:23:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 46194 transitions. [2023-04-03 01:23:33,011 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 46194 transitions. Word has length 181 [2023-04-03 01:23:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:33,012 INFO L495 AbstractCegarLoop]: Abstraction has 24046 states and 46194 transitions. [2023-04-03 01:23:33,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-03 01:23:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 46194 transitions. [2023-04-03 01:23:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-03 01:23:33,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:33,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:33,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-03 01:23:33,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:33,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:33,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash 308956468, now seen corresponding path program 2 times [2023-04-03 01:23:33,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:33,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224952224] [2023-04-03 01:23:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-03 01:23:33,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224952224] [2023-04-03 01:23:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224952224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886504266] [2023-04-03 01:23:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-03 01:23:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:33,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:23:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-03 01:23:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-03 01:23:33,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:23:33,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-03 01:23:33,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886504266] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:33,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:33,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:23:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491506264] [2023-04-03 01:23:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:33,822 INFO L87 Difference]: Start difference. First operand 24046 states and 46194 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:35,598 INFO L93 Difference]: Finished difference Result 41144 states and 83780 transitions. [2023-04-03 01:23:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 179 [2023-04-03 01:23:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:35,766 INFO L225 Difference]: With dead ends: 41144 [2023-04-03 01:23:35,766 INFO L226 Difference]: Without dead ends: 20359 [2023-04-03 01:23:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:35,995 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 141 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:35,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 372 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20359 states. [2023-04-03 01:23:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20359 to 18298. [2023-04-03 01:23:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18298 states, 13090 states have (on average 1.4373567608861726) internal successors, (18815), 15147 states have internal predecessors, (18815), 3691 states have call successors, (3691), 1429 states have call predecessors, (3691), 1516 states have return successors, (8663), 2810 states have call predecessors, (8663), 3687 states have call successors, (8663) [2023-04-03 01:23:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18298 states to 18298 states and 31169 transitions. [2023-04-03 01:23:37,692 INFO L78 Accepts]: Start accepts. Automaton has 18298 states and 31169 transitions. Word has length 179 [2023-04-03 01:23:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:37,693 INFO L495 AbstractCegarLoop]: Abstraction has 18298 states and 31169 transitions. [2023-04-03 01:23:37,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 18298 states and 31169 transitions. [2023-04-03 01:23:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-03 01:23:37,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:37,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:37,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-03 01:23:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:37,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:37,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1375590346, now seen corresponding path program 1 times [2023-04-03 01:23:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819442699] [2023-04-03 01:23:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-03 01:23:38,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:38,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819442699] [2023-04-03 01:23:38,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819442699] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:38,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455176533] [2023-04-03 01:23:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:38,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:38,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:38,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:23:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:38,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:38,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-03 01:23:38,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:38,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455176533] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:38,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:38,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:23:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986439180] [2023-04-03 01:23:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:38,509 INFO L87 Difference]: Start difference. First operand 18298 states and 31169 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:39,841 INFO L93 Difference]: Finished difference Result 35139 states and 61929 transitions. [2023-04-03 01:23:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 179 [2023-04-03 01:23:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:39,945 INFO L225 Difference]: With dead ends: 35139 [2023-04-03 01:23:39,945 INFO L226 Difference]: Without dead ends: 20928 [2023-04-03 01:23:40,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:40,040 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:40,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 199 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20928 states. [2023-04-03 01:23:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20928 to 20498. [2023-04-03 01:23:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20498 states, 14628 states have (on average 1.4020371889526935) internal successors, (20509), 16727 states have internal predecessors, (20509), 3963 states have call successors, (3963), 1765 states have call predecessors, (3963), 1906 states have return successors, (9011), 3094 states have call predecessors, (9011), 3959 states have call successors, (9011) [2023-04-03 01:23:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20498 states to 20498 states and 33483 transitions. [2023-04-03 01:23:41,787 INFO L78 Accepts]: Start accepts. Automaton has 20498 states and 33483 transitions. Word has length 179 [2023-04-03 01:23:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 20498 states and 33483 transitions. [2023-04-03 01:23:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:23:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20498 states and 33483 transitions. [2023-04-03 01:23:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-03 01:23:41,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:41,810 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:41,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 01:23:42,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:42,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash -632891819, now seen corresponding path program 1 times [2023-04-03 01:23:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:42,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84911741] [2023-04-03 01:23:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:42,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-03 01:23:42,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84911741] [2023-04-03 01:23:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84911741] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123486769] [2023-04-03 01:23:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:42,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:42,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:42,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:23:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:23:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:42,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 01:23:42,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 139 proven. 4 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-03 01:23:42,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:23:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-04-03 01:23:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123486769] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:23:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346619889] [2023-04-03 01:23:43,316 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2023-04-03 01:23:43,317 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:23:43,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:23:43,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:23:43,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:23:43,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 73 for LOIs [2023-04-03 01:23:43,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2023-04-03 01:23:44,306 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 62 for LOIs [2023-04-03 01:23:44,318 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 90 for LOIs [2023-04-03 01:23:44,893 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:23:45,231 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:23:55,873 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:23:56,026 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:23:58,248 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:23:58,401 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:00,282 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:00,408 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:03,953 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:04,034 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:05,551 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:05,630 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:08,175 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:08,241 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:11,071 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:11,162 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:24:15,888 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 80 for LOIs [2023-04-03 01:24:15,931 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 56 for LOIs [2023-04-03 01:24:15,942 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 27 for LOIs [2023-04-03 01:24:16,016 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 59 for LOIs [2023-04-03 01:24:17,204 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 62 for LOIs [2023-04-03 01:24:17,341 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 47 for LOIs [2023-04-03 01:24:17,347 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 62 for LOIs [2023-04-03 01:24:17,363 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 55 for LOIs [2023-04-03 01:24:17,389 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 17 for LOIs [2023-04-03 01:24:17,401 INFO L197 IcfgInterpreter]: Interpreting procedure transmit1 with input of size 49 for LOIs [2023-04-03 01:24:17,484 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2023-04-03 01:24:17,581 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 29 for LOIs [2023-04-03 01:24:17,886 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 17 for LOIs [2023-04-03 01:24:17,914 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 31 for LOIs [2023-04-03 01:24:17,957 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit2_triggered with input of size 34 for LOIs [2023-04-03 01:24:17,981 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit3_triggered with input of size 17 for LOIs [2023-04-03 01:24:17,986 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 01:24:24,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '475834#(and (= ~t1_i~0 1) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (exists ((v_eval_~tmp~0_BEFORE_CALL_18 Int)) (and (<= 0 v_eval_~tmp~0_BEFORE_CALL_18) (<= v_eval_~tmp~0_BEFORE_CALL_18 |#StackHeapBarrier|) (not (= v_eval_~tmp~0_BEFORE_CALL_18 0)) (<= 1 (+ |#StackHeapBarrier| v_eval_~tmp~0_BEFORE_CALL_18)) (<= v_eval_~tmp~0_BEFORE_CALL_18 1))) (= ~t3_i~0 1) (= |#NULL.base| 0))' at error location [2023-04-03 01:24:24,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 01:24:24,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:24:24,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 13 [2023-04-03 01:24:24,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695816814] [2023-04-03 01:24:24,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:24:24,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:24:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:24:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=7242, Unknown=0, NotChecked=0, Total=7832 [2023-04-03 01:24:24,949 INFO L87 Difference]: Start difference. First operand 20498 states and 33483 transitions. Second operand has 13 states, 10 states have (on average 14.9) internal successors, (149), 12 states have internal predecessors, (149), 8 states have call successors, (67), 6 states have call predecessors, (67), 11 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) [2023-04-03 01:24:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:28,992 INFO L93 Difference]: Finished difference Result 64491 states and 115324 transitions. [2023-04-03 01:24:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 01:24:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 14.9) internal successors, (149), 12 states have internal predecessors, (149), 8 states have call successors, (67), 6 states have call predecessors, (67), 11 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) Word has length 248 [2023-04-03 01:24:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:29,267 INFO L225 Difference]: With dead ends: 64491 [2023-04-03 01:24:29,267 INFO L226 Difference]: Without dead ends: 44010 [2023-04-03 01:24:29,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 651 SyntacticMatches, 23 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=855, Invalid=10275, Unknown=0, NotChecked=0, Total=11130 [2023-04-03 01:24:29,397 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 607 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1070 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:24:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44010 states. [2023-04-03 01:24:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44010 to 42124. [2023-04-03 01:24:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42124 states, 30636 states have (on average 1.4040671105888498) internal successors, (43015), 35179 states have internal predecessors, (43015), 8262 states have call successors, (8262), 2575 states have call predecessors, (8262), 3225 states have return successors, (20943), 6941 states have call predecessors, (20943), 8258 states have call successors, (20943) [2023-04-03 01:24:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42124 states to 42124 states and 72220 transitions. [2023-04-03 01:24:32,763 INFO L78 Accepts]: Start accepts. Automaton has 42124 states and 72220 transitions. Word has length 248 [2023-04-03 01:24:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:32,764 INFO L495 AbstractCegarLoop]: Abstraction has 42124 states and 72220 transitions. [2023-04-03 01:24:32,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 14.9) internal successors, (149), 12 states have internal predecessors, (149), 8 states have call successors, (67), 6 states have call predecessors, (67), 11 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) [2023-04-03 01:24:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 42124 states and 72220 transitions. [2023-04-03 01:24:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-03 01:24:32,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:32,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:32,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:32,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:32,997 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:32,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1660247150, now seen corresponding path program 1 times [2023-04-03 01:24:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:32,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940220957] [2023-04-03 01:24:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-03 01:24:33,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940220957] [2023-04-03 01:24:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940220957] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092036419] [2023-04-03 01:24:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:33,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:33,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:33,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:24:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:33,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-03 01:24:33,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-03 01:24:33,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092036419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:33,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-04-03 01:24:33,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871197086] [2023-04-03 01:24:33,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:24:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:24:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:24:33,589 INFO L87 Difference]: Start difference. First operand 42124 states and 72220 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-03 01:24:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:40,478 INFO L93 Difference]: Finished difference Result 108699 states and 200216 transitions. [2023-04-03 01:24:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:24:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 181 [2023-04-03 01:24:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:40,941 INFO L225 Difference]: With dead ends: 108699 [2023-04-03 01:24:40,942 INFO L226 Difference]: Without dead ends: 66592 [2023-04-03 01:24:41,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:24:41,361 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 623 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:41,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 296 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:24:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66592 states. [2023-04-03 01:24:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66592 to 59092. [2023-04-03 01:24:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59092 states, 43295 states have (on average 1.3711745005196905) internal successors, (59365), 49255 states have internal predecessors, (59365), 11155 states have call successors, (11155), 3537 states have call predecessors, (11155), 4641 states have return successors, (31104), 9696 states have call predecessors, (31104), 11151 states have call successors, (31104) [2023-04-03 01:24:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59092 states to 59092 states and 101624 transitions. [2023-04-03 01:24:46,829 INFO L78 Accepts]: Start accepts. Automaton has 59092 states and 101624 transitions. Word has length 181 [2023-04-03 01:24:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:46,829 INFO L495 AbstractCegarLoop]: Abstraction has 59092 states and 101624 transitions. [2023-04-03 01:24:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-03 01:24:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 59092 states and 101624 transitions. [2023-04-03 01:24:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-04-03 01:24:46,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:46,856 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:46,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:47,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:47,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:47,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash -860594886, now seen corresponding path program 1 times [2023-04-03 01:24:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:47,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439087795] [2023-04-03 01:24:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 31 proven. 43 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-04-03 01:24:47,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439087795] [2023-04-03 01:24:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439087795] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013420244] [2023-04-03 01:24:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:47,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:47,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:24:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:48,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:24:48,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-03 01:24:48,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:48,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013420244] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:48,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:48,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-04-03 01:24:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273306648] [2023-04-03 01:24:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:24:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:24:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:24:48,073 INFO L87 Difference]: Start difference. First operand 59092 states and 101624 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:24:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:24:52,840 INFO L93 Difference]: Finished difference Result 101745 states and 184433 transitions. [2023-04-03 01:24:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:24:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 249 [2023-04-03 01:24:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:24:53,070 INFO L225 Difference]: With dead ends: 101745 [2023-04-03 01:24:53,071 INFO L226 Difference]: Without dead ends: 49785 [2023-04-03 01:24:53,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:24:53,549 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:24:53,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 376 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:24:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49785 states. [2023-04-03 01:24:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49785 to 45559. [2023-04-03 01:24:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45559 states, 33755 states have (on average 1.3752036735298474) internal successors, (46420), 37989 states have internal predecessors, (46420), 8307 states have call successors, (8307), 2692 states have call predecessors, (8307), 3496 states have return successors, (16696), 7494 states have call predecessors, (16696), 8303 states have call successors, (16696) [2023-04-03 01:24:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45559 states to 45559 states and 71423 transitions. [2023-04-03 01:24:57,359 INFO L78 Accepts]: Start accepts. Automaton has 45559 states and 71423 transitions. Word has length 249 [2023-04-03 01:24:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:24:57,360 INFO L495 AbstractCegarLoop]: Abstraction has 45559 states and 71423 transitions. [2023-04-03 01:24:57,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:24:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 45559 states and 71423 transitions. [2023-04-03 01:24:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-04-03 01:24:57,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:24:57,380 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:24:57,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-03 01:24:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-03 01:24:57,588 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:24:57,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:24:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 980016636, now seen corresponding path program 2 times [2023-04-03 01:24:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:24:57,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287721292] [2023-04-03 01:24:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:24:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:24:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:24:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 31 proven. 43 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-04-03 01:24:57,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:24:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287721292] [2023-04-03 01:24:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287721292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:24:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503988742] [2023-04-03 01:24:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-03 01:24:57,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:24:57,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:24:57,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:24:57,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-03 01:24:58,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-03 01:24:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-03 01:24:58,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-03 01:24:58,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:24:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-03 01:24:58,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:24:58,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503988742] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:24:58,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:24:58,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-04-03 01:24:58,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255343692] [2023-04-03 01:24:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:24:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:24:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:24:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:24:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:24:58,270 INFO L87 Difference]: Start difference. First operand 45559 states and 71423 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (36), 4 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-03 01:25:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:02,603 INFO L93 Difference]: Finished difference Result 96706 states and 154545 transitions. [2023-04-03 01:25:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 01:25:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (36), 4 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) Word has length 249 [2023-04-03 01:25:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:02,823 INFO L225 Difference]: With dead ends: 96706 [2023-04-03 01:25:02,824 INFO L226 Difference]: Without dead ends: 51164 [2023-04-03 01:25:02,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-03 01:25:02,984 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 219 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:02,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 651 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:25:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51164 states. [2023-04-03 01:25:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51164 to 25895. [2023-04-03 01:25:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25895 states, 19227 states have (on average 1.350444687158683) internal successors, (25965), 21155 states have internal predecessors, (25965), 4614 states have call successors, (4614), 1846 states have call predecessors, (4614), 2053 states have return successors, (7481), 4301 states have call predecessors, (7481), 4610 states have call successors, (7481) [2023-04-03 01:25:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25895 states to 25895 states and 38060 transitions. [2023-04-03 01:25:05,552 INFO L78 Accepts]: Start accepts. Automaton has 25895 states and 38060 transitions. Word has length 249 [2023-04-03 01:25:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:05,552 INFO L495 AbstractCegarLoop]: Abstraction has 25895 states and 38060 transitions. [2023-04-03 01:25:05,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (36), 4 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-03 01:25:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25895 states and 38060 transitions. [2023-04-03 01:25:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-03 01:25:05,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:05,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:05,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-03 01:25:05,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-03 01:25:05,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:05,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1912942603, now seen corresponding path program 1 times [2023-04-03 01:25:05,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:05,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716363149] [2023-04-03 01:25:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:05,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-03 01:25:06,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716363149] [2023-04-03 01:25:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716363149] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838240386] [2023-04-03 01:25:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:06,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:06,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:25:06,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-03 01:25:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:06,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-03 01:25:06,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-03 01:25:06,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:25:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838240386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:25:06,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:25:06,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 11 [2023-04-03 01:25:06,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511874291] [2023-04-03 01:25:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:25:06,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:25:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:25:06,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:25:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:25:06,383 INFO L87 Difference]: Start difference. First operand 25895 states and 38060 transitions. Second operand has 7 states, 5 states have (on average 18.4) internal successors, (92), 7 states have internal predecessors, (92), 5 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-03 01:25:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:25:10,173 INFO L93 Difference]: Finished difference Result 65718 states and 99252 transitions. [2023-04-03 01:25:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:25:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 18.4) internal successors, (92), 7 states have internal predecessors, (92), 5 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 182 [2023-04-03 01:25:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:25:10,327 INFO L225 Difference]: With dead ends: 65718 [2023-04-03 01:25:10,327 INFO L226 Difference]: Without dead ends: 39912 [2023-04-03 01:25:10,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:25:10,433 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 623 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:25:10,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 304 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:25:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39912 states. [2023-04-03 01:25:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39912 to 35597. [2023-04-03 01:25:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35597 states, 26642 states have (on average 1.3199834847233691) internal successors, (35167), 29099 states have internal predecessors, (35167), 6125 states have call successors, (6125), 2423 states have call predecessors, (6125), 2829 states have return successors, (10175), 5919 states have call predecessors, (10175), 6121 states have call successors, (10175) [2023-04-03 01:25:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35597 states to 35597 states and 51467 transitions. [2023-04-03 01:25:13,900 INFO L78 Accepts]: Start accepts. Automaton has 35597 states and 51467 transitions. Word has length 182 [2023-04-03 01:25:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:25:13,900 INFO L495 AbstractCegarLoop]: Abstraction has 35597 states and 51467 transitions. [2023-04-03 01:25:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 18.4) internal successors, (92), 7 states have internal predecessors, (92), 5 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-03 01:25:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 35597 states and 51467 transitions. [2023-04-03 01:25:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-03 01:25:13,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:25:13,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:25:13,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-03 01:25:14,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-03 01:25:14,110 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:25:14,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:25:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash 668334505, now seen corresponding path program 1 times [2023-04-03 01:25:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:25:14,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861214669] [2023-04-03 01:25:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:25:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-03 01:25:14,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:25:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861214669] [2023-04-03 01:25:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861214669] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:25:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203576232] [2023-04-03 01:25:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:25:14,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:25:14,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:25:14,832 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:25:14,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-03 01:25:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:25:15,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-03 01:25:15,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:25:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 74 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-03 01:25:15,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:25:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-03 01:25:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203576232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:25:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295892018] [2023-04-03 01:25:15,973 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2023-04-03 01:25:15,973 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:25:15,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:25:15,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:25:15,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:25:16,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 73 for LOIs [2023-04-03 01:25:16,201 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2023-04-03 01:25:16,484 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 62 for LOIs [2023-04-03 01:25:16,495 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 90 for LOIs [2023-04-03 01:25:17,033 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:17,144 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:27,014 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:27,110 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:30,326 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 70 for LOIs [2023-04-03 01:25:30,353 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 54 for LOIs [2023-04-03 01:25:30,358 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 65 for LOIs [2023-04-03 01:25:38,402 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 83 for LOIs [2023-04-03 01:25:38,577 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 59 for LOIs [2023-04-03 01:25:38,584 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 62 for LOIs [2023-04-03 01:25:38,600 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 53 for LOIs [2023-04-03 01:25:38,626 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 01:25:38,685 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6561 conjuctions. This might take some time... [2023-04-03 01:25:48,001 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 6561 conjuctions.