/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/token_ring.12.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:27:20,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:27:20,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:27:20,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:27:20,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:27:20,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:27:20,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:27:20,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:27:20,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:27:20,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:27:20,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:27:20,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:27:20,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:27:20,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:27:20,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:27:20,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:27:20,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:27:20,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:27:20,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:27:20,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:27:20,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:27:20,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:27:20,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:27:20,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:27:20,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:27:20,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:27:20,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:27:20,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:27:20,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:27:20,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:27:20,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:27:20,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:27:20,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:27:20,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:27:20,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:27:20,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:27:20,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:27:20,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:27:20,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:27:20,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:27:20,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:27:20,488 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 01:27:20,503 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:27:20,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:27:20,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:27:20,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:27:20,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:27:20,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:27:20,504 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:27:20,505 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:27:20,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:27:20,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:27:20,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:27:20,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:27:20,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:27:20,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:27:20,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:27:20,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:27:20,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:27:20,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:27:20,681 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:27:20,681 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:27:20,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2023-04-03 01:27:21,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:27:22,241 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:27:22,242 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2023-04-03 01:27:22,253 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/327d967c6/f57e13bfcc0741c5a720df67d87e2cc3/FLAG10c30212c [2023-04-03 01:27:22,266 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/327d967c6/f57e13bfcc0741c5a720df67d87e2cc3 [2023-04-03 01:27:22,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:27:22,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:27:22,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:27:22,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:27:22,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:27:22,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d30327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22, skipping insertion in model container [2023-04-03 01:27:22,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:27:22,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:27:22,462 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2023-04-03 01:27:22,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:27:22,586 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:27:22,595 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2023-04-03 01:27:22,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:27:22,674 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:27:22,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22 WrapperNode [2023-04-03 01:27:22,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:27:22,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:27:22,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:27:22,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:27:22,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:27:22,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:27:22,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:27:22,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:27:22,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (1/1) ... [2023-04-03 01:27:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:27:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:22,786 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 01:27:22,804 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 01:27:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:27:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:27:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:27:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:27:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:27:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:27:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2023-04-03 01:27:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2023-04-03 01:27:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:27:22,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:27:22,825 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:27:22,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:27:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:27:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-03 01:27:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-03 01:27:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-03 01:27:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-03 01:27:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2023-04-03 01:27:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-03 01:27:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:27:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:27:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:27:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:27:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:27:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:27:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:27:22,934 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:27:22,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:27:23,641 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:27:24,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:27:24,011 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-04-03 01:27:24,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:27:24 BoogieIcfgContainer [2023-04-03 01:27:24,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:27:24,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:27:24,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:27:24,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:27:24,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:27:22" (1/3) ... [2023-04-03 01:27:24,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbb22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:27:24, skipping insertion in model container [2023-04-03 01:27:24,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:27:22" (2/3) ... [2023-04-03 01:27:24,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbb22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:27:24, skipping insertion in model container [2023-04-03 01:27:24,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:27:24" (3/3) ... [2023-04-03 01:27:24,021 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2023-04-03 01:27:24,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:27:24,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:27:24,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:27:24,090 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;@6aa73ae7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:27:24,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:27:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 300 states, 193 states have (on average 1.461139896373057) internal successors, (282), 211 states have internal predecessors, (282), 63 states have call successors, (63), 42 states have call predecessors, (63), 42 states have return successors, (63), 62 states have call predecessors, (63), 63 states have call successors, (63) [2023-04-03 01:27:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-03 01:27:24,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:24,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:24,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:24,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1181800103, now seen corresponding path program 1 times [2023-04-03 01:27:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:24,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710933779] [2023-04-03 01:27:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:24,828 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 01:27:24,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:24,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710933779] [2023-04-03 01:27:24,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710933779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:24,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:27:24,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:27:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128404872] [2023-04-03 01:27:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:27:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:27:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:27:24,888 INFO L87 Difference]: Start difference. First operand has 300 states, 193 states have (on average 1.461139896373057) internal successors, (282), 211 states have internal predecessors, (282), 63 states have call successors, (63), 42 states have call predecessors, (63), 42 states have return successors, (63), 62 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:27:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:25,492 INFO L93 Difference]: Finished difference Result 853 states and 1229 transitions. [2023-04-03 01:27:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:27:25,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 134 [2023-04-03 01:27:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:25,518 INFO L225 Difference]: With dead ends: 853 [2023-04-03 01:27:25,518 INFO L226 Difference]: Without dead ends: 557 [2023-04-03 01:27:25,525 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 01:27:25,528 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 721 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:25,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1041 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:27:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-03 01:27:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 556. [2023-04-03 01:27:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 366 states have (on average 1.4289617486338797) internal successors, (523), 396 states have internal predecessors, (523), 115 states have call successors, (115), 78 states have call predecessors, (115), 74 states have return successors, (112), 109 states have call predecessors, (112), 111 states have call successors, (112) [2023-04-03 01:27:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 750 transitions. [2023-04-03 01:27:25,599 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 750 transitions. Word has length 134 [2023-04-03 01:27:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:25,599 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 750 transitions. [2023-04-03 01:27:25,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-03 01:27:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 750 transitions. [2023-04-03 01:27:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-04-03 01:27:25,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:25,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:27:25,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:25,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1313717157, now seen corresponding path program 1 times [2023-04-03 01:27:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:25,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375416181] [2023-04-03 01:27:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-03 01:27:26,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375416181] [2023-04-03 01:27:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375416181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928380713] [2023-04-03 01:27:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:26,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:26,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:26,138 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 01:27:26,149 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 01:27:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:26,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 2351 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:27:26,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:27:26,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928380713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013286923] [2023-04-03 01:27:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:26,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:26,679 INFO L87 Difference]: Start difference. First operand 556 states and 750 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-03 01:27:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:26,829 INFO L93 Difference]: Finished difference Result 956 states and 1326 transitions. [2023-04-03 01:27:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 258 [2023-04-03 01:27:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:26,858 INFO L225 Difference]: With dead ends: 956 [2023-04-03 01:27:26,859 INFO L226 Difference]: Without dead ends: 680 [2023-04-03 01:27:26,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:26,861 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 155 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:26,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 842 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-04-03 01:27:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 647. [2023-04-03 01:27:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 431 states have (on average 1.4779582366589328) internal successors, (637), 473 states have internal predecessors, (637), 128 states have call successors, (128), 91 states have call predecessors, (128), 87 states have return successors, (137), 122 states have call predecessors, (137), 124 states have call successors, (137) [2023-04-03 01:27:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 902 transitions. [2023-04-03 01:27:26,944 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 902 transitions. Word has length 258 [2023-04-03 01:27:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:26,948 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 902 transitions. [2023-04-03 01:27:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-03 01:27:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 902 transitions. [2023-04-03 01:27:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:26,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:26,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:26,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 01:27:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:27,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:27,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1496202537, now seen corresponding path program 1 times [2023-04-03 01:27:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219623071] [2023-04-03 01:27:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:27,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219623071] [2023-04-03 01:27:27,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219623071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179234215] [2023-04-03 01:27:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:27,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:27,795 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 01:27:27,815 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 01:27:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:28,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:27:28,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:27:28,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:28,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179234215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:28,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:28,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125592653] [2023-04-03 01:27:28,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:28,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:28,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:28,284 INFO L87 Difference]: Start difference. First operand 647 states and 902 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:28,385 INFO L93 Difference]: Finished difference Result 1495 states and 2121 transitions. [2023-04-03 01:27:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 362 [2023-04-03 01:27:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:28,390 INFO L225 Difference]: With dead ends: 1495 [2023-04-03 01:27:28,390 INFO L226 Difference]: Without dead ends: 864 [2023-04-03 01:27:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:28,393 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 354 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:28,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 443 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-04-03 01:27:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2023-04-03 01:27:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 590 states have (on average 1.428813559322034) internal successors, (843), 632 states have internal predecessors, (843), 156 states have call successors, (156), 121 states have call predecessors, (156), 117 states have return successors, (165), 150 states have call predecessors, (165), 152 states have call successors, (165) [2023-04-03 01:27:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1164 transitions. [2023-04-03 01:27:28,431 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1164 transitions. Word has length 362 [2023-04-03 01:27:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:28,431 INFO L495 AbstractCegarLoop]: Abstraction has 864 states and 1164 transitions. [2023-04-03 01:27:28,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1164 transitions. [2023-04-03 01:27:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:28,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:28,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:28,451 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 01:27:28,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-03 01:27:28,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:28,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1419410999, now seen corresponding path program 1 times [2023-04-03 01:27:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039210489] [2023-04-03 01:27:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-03 01:27:29,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039210489] [2023-04-03 01:27:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039210489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254195209] [2023-04-03 01:27:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:29,116 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 01:27:29,118 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 01:27:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:29,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:27:29,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:27:29,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254195209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238884620] [2023-04-03 01:27:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:29,591 INFO L87 Difference]: Start difference. First operand 864 states and 1164 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:27:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:29,732 INFO L93 Difference]: Finished difference Result 2547 states and 3599 transitions. [2023-04-03 01:27:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:29,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 362 [2023-04-03 01:27:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:29,739 INFO L225 Difference]: With dead ends: 2547 [2023-04-03 01:27:29,739 INFO L226 Difference]: Without dead ends: 1700 [2023-04-03 01:27:29,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:29,742 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 281 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:29,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 894 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-04-03 01:27:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1691. [2023-04-03 01:27:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1163 states have (on average 1.4247635425623388) internal successors, (1657), 1242 states have internal predecessors, (1657), 299 states have call successors, (299), 235 states have call predecessors, (299), 228 states have return successors, (395), 290 states have call predecessors, (395), 295 states have call successors, (395) [2023-04-03 01:27:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2351 transitions. [2023-04-03 01:27:29,847 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2351 transitions. Word has length 362 [2023-04-03 01:27:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:29,849 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2351 transitions. [2023-04-03 01:27:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:27:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2351 transitions. [2023-04-03 01:27:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-04-03 01:27:29,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:29,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:27:29,867 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 01:27:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:30,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:30,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -671330869, now seen corresponding path program 1 times [2023-04-03 01:27:30,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:30,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915360092] [2023-04-03 01:27:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:30,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-04-03 01:27:30,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:30,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915360092] [2023-04-03 01:27:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915360092] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603816386] [2023-04-03 01:27:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:30,503 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 01:27:30,505 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 01:27:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:30,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:27:30,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-03 01:27:31,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603816386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:31,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894803589] [2023-04-03 01:27:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:31,102 INFO L87 Difference]: Start difference. First operand 1691 states and 2351 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:31,304 INFO L93 Difference]: Finished difference Result 5015 states and 7432 transitions. [2023-04-03 01:27:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 363 [2023-04-03 01:27:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:31,318 INFO L225 Difference]: With dead ends: 5015 [2023-04-03 01:27:31,318 INFO L226 Difference]: Without dead ends: 3342 [2023-04-03 01:27:31,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:31,328 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 304 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:31,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 947 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2023-04-03 01:27:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 3328. [2023-04-03 01:27:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 2298 states have (on average 1.4177545691906006) internal successors, (3258), 2448 states have internal predecessors, (3258), 582 states have call successors, (582), 462 states have call predecessors, (582), 447 states have return successors, (984), 565 states have call predecessors, (984), 578 states have call successors, (984) [2023-04-03 01:27:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4824 transitions. [2023-04-03 01:27:31,444 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4824 transitions. Word has length 363 [2023-04-03 01:27:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:31,445 INFO L495 AbstractCegarLoop]: Abstraction has 3328 states and 4824 transitions. [2023-04-03 01:27:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:27:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4824 transitions. [2023-04-03 01:27:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-04-03 01:27:31,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:31,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:31,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:27:31,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:31,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:31,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2037052437, now seen corresponding path program 1 times [2023-04-03 01:27:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834441938] [2023-04-03 01:27:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:31,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:32,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834441938] [2023-04-03 01:27:32,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834441938] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:32,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902831501] [2023-04-03 01:27:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:32,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:32,098 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 01:27:32,147 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 01:27:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:32,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:27:32,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 01:27:32,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902831501] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:32,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:32,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:32,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621292891] [2023-04-03 01:27:32,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:32,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:32,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:32,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:32,662 INFO L87 Difference]: Start difference. First operand 3328 states and 4824 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:27:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:32,842 INFO L93 Difference]: Finished difference Result 4999 states and 7136 transitions. [2023-04-03 01:27:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:32,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 363 [2023-04-03 01:27:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:32,862 INFO L225 Difference]: With dead ends: 4999 [2023-04-03 01:27:32,862 INFO L226 Difference]: Without dead ends: 3334 [2023-04-03 01:27:32,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:32,869 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 268 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:32,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 681 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2023-04-03 01:27:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3326. [2023-04-03 01:27:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 2298 states have (on average 1.411662315056571) internal successors, (3244), 2448 states have internal predecessors, (3244), 580 states have call successors, (580), 462 states have call predecessors, (580), 447 states have return successors, (774), 561 states have call predecessors, (774), 576 states have call successors, (774) [2023-04-03 01:27:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4598 transitions. [2023-04-03 01:27:33,069 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4598 transitions. Word has length 363 [2023-04-03 01:27:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:33,069 INFO L495 AbstractCegarLoop]: Abstraction has 3326 states and 4598 transitions. [2023-04-03 01:27:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:27:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4598 transitions. [2023-04-03 01:27:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:33,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:33,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:33,089 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 01:27:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:33,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:33,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1527455733, now seen corresponding path program 1 times [2023-04-03 01:27:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396694376] [2023-04-03 01:27:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:33,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:33,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396694376] [2023-04-03 01:27:33,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396694376] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146140237] [2023-04-03 01:27:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:33,703 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 01:27:33,704 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 01:27:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:34,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:34,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-03 01:27:34,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:34,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146140237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:34,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:34,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:34,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110573076] [2023-04-03 01:27:34,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:34,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:34,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:34,250 INFO L87 Difference]: Start difference. First operand 3326 states and 4598 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:27:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:34,534 INFO L93 Difference]: Finished difference Result 9900 states and 14138 transitions. [2023-04-03 01:27:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) Word has length 362 [2023-04-03 01:27:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:34,561 INFO L225 Difference]: With dead ends: 9900 [2023-04-03 01:27:34,561 INFO L226 Difference]: Without dead ends: 6590 [2023-04-03 01:27:34,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:34,576 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 307 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:34,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 659 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2023-04-03 01:27:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 6574. [2023-04-03 01:27:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 4554 states have (on average 1.4057971014492754) internal successors, (6402), 4840 states have internal predecessors, (6402), 1140 states have call successors, (1140), 918 states have call predecessors, (1140), 879 states have return successors, (1544), 1093 states have call predecessors, (1544), 1136 states have call successors, (1544) [2023-04-03 01:27:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 9086 transitions. [2023-04-03 01:27:34,870 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 9086 transitions. Word has length 362 [2023-04-03 01:27:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:34,870 INFO L495 AbstractCegarLoop]: Abstraction has 6574 states and 9086 transitions. [2023-04-03 01:27:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:27:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 9086 transitions. [2023-04-03 01:27:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:34,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:34,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:34,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-03 01:27:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:35,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:35,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1231768906, now seen corresponding path program 1 times [2023-04-03 01:27:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:35,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127422191] [2023-04-03 01:27:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:35,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:35,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127422191] [2023-04-03 01:27:35,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127422191] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608005509] [2023-04-03 01:27:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:35,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:35,447 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 01:27:35,449 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 01:27:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:35,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:35,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-03 01:27:35,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608005509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:35,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:35,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888301726] [2023-04-03 01:27:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:35,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:35,867 INFO L87 Difference]: Start difference. First operand 6574 states and 9086 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:27:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:36,371 INFO L93 Difference]: Finished difference Result 19600 states and 28012 transitions. [2023-04-03 01:27:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 362 [2023-04-03 01:27:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:36,432 INFO L225 Difference]: With dead ends: 19600 [2023-04-03 01:27:36,433 INFO L226 Difference]: Without dead ends: 13042 [2023-04-03 01:27:36,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:36,473 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 349 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:36,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 658 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13042 states. [2023-04-03 01:27:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13042 to 13014. [2023-04-03 01:27:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13014 states, 9030 states have (on average 1.3995570321151716) internal successors, (12638), 9576 states have internal predecessors, (12638), 2252 states have call successors, (2252), 1830 states have call predecessors, (2252), 1731 states have return successors, (3116), 2137 states have call predecessors, (3116), 2248 states have call successors, (3116) [2023-04-03 01:27:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13014 states to 13014 states and 18006 transitions. [2023-04-03 01:27:37,217 INFO L78 Accepts]: Start accepts. Automaton has 13014 states and 18006 transitions. Word has length 362 [2023-04-03 01:27:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:37,218 INFO L495 AbstractCegarLoop]: Abstraction has 13014 states and 18006 transitions. [2023-04-03 01:27:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-03 01:27:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13014 states and 18006 transitions. [2023-04-03 01:27:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:37,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:37,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:37,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-03 01:27:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:37,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:37,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -225502807, now seen corresponding path program 1 times [2023-04-03 01:27:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494955493] [2023-04-03 01:27:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-03 01:27:37,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494955493] [2023-04-03 01:27:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494955493] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518338821] [2023-04-03 01:27:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:37,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:37,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:37,919 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 01:27:37,966 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 01:27:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:38,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:38,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-04-03 01:27:38,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:38,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518338821] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:38,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331531658] [2023-04-03 01:27:38,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:38,471 INFO L87 Difference]: Start difference. First operand 13014 states and 18006 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-03 01:27:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:39,453 INFO L93 Difference]: Finished difference Result 38832 states and 55670 transitions. [2023-04-03 01:27:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) Word has length 362 [2023-04-03 01:27:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:39,577 INFO L225 Difference]: With dead ends: 38832 [2023-04-03 01:27:39,578 INFO L226 Difference]: Without dead ends: 25834 [2023-04-03 01:27:39,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:39,649 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 314 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:39,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 640 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25834 states. [2023-04-03 01:27:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25834 to 25782. [2023-04-03 01:27:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25782 states, 17910 states have (on average 1.393076493579006) internal successors, (24950), 18952 states have internal predecessors, (24950), 4460 states have call successors, (4460), 3654 states have call predecessors, (4460), 3411 states have return successors, (6378), 4185 states have call predecessors, (6378), 4456 states have call successors, (6378) [2023-04-03 01:27:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25782 states to 25782 states and 35788 transitions. [2023-04-03 01:27:41,106 INFO L78 Accepts]: Start accepts. Automaton has 25782 states and 35788 transitions. Word has length 362 [2023-04-03 01:27:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:41,107 INFO L495 AbstractCegarLoop]: Abstraction has 25782 states and 35788 transitions. [2023-04-03 01:27:41,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (34), 2 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-03 01:27:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25782 states and 35788 transitions. [2023-04-03 01:27:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:41,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:41,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:41,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-03 01:27:41,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 01:27:41,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:41,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1022540202, now seen corresponding path program 1 times [2023-04-03 01:27:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95893527] [2023-04-03 01:27:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:41,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95893527] [2023-04-03 01:27:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95893527] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941853243] [2023-04-03 01:27:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:41,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:41,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:41,927 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 01:27:41,957 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 01:27:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:42,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:42,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-04-03 01:27:42,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941853243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531338028] [2023-04-03 01:27:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:42,447 INFO L87 Difference]: Start difference. First operand 25782 states and 35788 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:27:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:44,284 INFO L93 Difference]: Finished difference Result 76960 states and 111076 transitions. [2023-04-03 01:27:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) Word has length 362 [2023-04-03 01:27:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:44,491 INFO L225 Difference]: With dead ends: 76960 [2023-04-03 01:27:44,492 INFO L226 Difference]: Without dead ends: 51194 [2023-04-03 01:27:44,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:44,613 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 300 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:44,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 640 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51194 states. [2023-04-03 01:27:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51194 to 51094. [2023-04-03 01:27:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51094 states, 35526 states have (on average 1.386421212633001) internal successors, (49254), 37512 states have internal predecessors, (49254), 8844 states have call successors, (8844), 7302 states have call predecessors, (8844), 6723 states have return successors, (13300), 8201 states have call predecessors, (13300), 8840 states have call successors, (13300) [2023-04-03 01:27:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51094 states to 51094 states and 71398 transitions. [2023-04-03 01:27:47,739 INFO L78 Accepts]: Start accepts. Automaton has 51094 states and 71398 transitions. Word has length 362 [2023-04-03 01:27:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:27:47,740 INFO L495 AbstractCegarLoop]: Abstraction has 51094 states and 71398 transitions. [2023-04-03 01:27:47,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2023-04-03 01:27:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 51094 states and 71398 transitions. [2023-04-03 01:27:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:27:48,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:27:48,058 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:27:48,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-03 01:27:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 01:27:48,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:27:48,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:27:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1243929269, now seen corresponding path program 1 times [2023-04-03 01:27:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:27:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633330574] [2023-04-03 01:27:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:27:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-04-03 01:27:48,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:27:48,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633330574] [2023-04-03 01:27:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633330574] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:27:48,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892611789] [2023-04-03 01:27:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:27:48,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:27:48,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:27:48,819 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 01:27:48,837 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 01:27:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:27:49,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:27:49,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:27:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-04-03 01:27:49,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:27:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892611789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:27:49,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:27:49,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-03 01:27:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803251793] [2023-04-03 01:27:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:27:49,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:27:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:27:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:27:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:49,318 INFO L87 Difference]: Start difference. First operand 51094 states and 71398 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-03 01:27:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:27:54,089 INFO L93 Difference]: Finished difference Result 152544 states and 222878 transitions. [2023-04-03 01:27:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:27:54,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) Word has length 362 [2023-04-03 01:27:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:27:54,969 INFO L225 Difference]: With dead ends: 152544 [2023-04-03 01:27:54,970 INFO L226 Difference]: Without dead ends: 101466 [2023-04-03 01:27:55,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:27:55,449 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 328 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:27:55,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 640 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:27:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101466 states. [2023-04-03 01:28:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101466 to 101270. [2023-04-03 01:28:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101270 states, 70470 states have (on average 1.3796225344118065) internal successors, (97222), 74248 states have internal predecessors, (97222), 17548 states have call successors, (17548), 14598 states have call predecessors, (17548), 13251 states have return successors, (28426), 16073 states have call predecessors, (28426), 17544 states have call successors, (28426) [2023-04-03 01:28:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101270 states to 101270 states and 143196 transitions. [2023-04-03 01:28:01,262 INFO L78 Accepts]: Start accepts. Automaton has 101270 states and 143196 transitions. Word has length 362 [2023-04-03 01:28:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:01,263 INFO L495 AbstractCegarLoop]: Abstraction has 101270 states and 143196 transitions. [2023-04-03 01:28:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 3 states have call successors, (32) [2023-04-03 01:28:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 101270 states and 143196 transitions. [2023-04-03 01:28:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:28:02,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:02,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:02,130 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 01:28:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 01:28:02,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:02,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1399792460, now seen corresponding path program 1 times [2023-04-03 01:28:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045366046] [2023-04-03 01:28:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-03 01:28:03,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045366046] [2023-04-03 01:28:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045366046] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478071900] [2023-04-03 01:28:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:03,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:03,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:03,315 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 01:28:03,315 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 01:28:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:03,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-03 01:28:03,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 11 proven. 185 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:28:03,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:28:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-04-03 01:28:04,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478071900] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:04,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-03 01:28:04,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-03 01:28:04,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248302781] [2023-04-03 01:28:04,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:04,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:28:04,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:04,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:28:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:28:04,393 INFO L87 Difference]: Start difference. First operand 101270 states and 143196 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-03 01:28:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:10,777 INFO L93 Difference]: Finished difference Result 168478 states and 246826 transitions. [2023-04-03 01:28:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 01:28:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 362 [2023-04-03 01:28:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:11,697 INFO L225 Difference]: With dead ends: 168478 [2023-04-03 01:28:11,697 INFO L226 Difference]: Without dead ends: 117625 [2023-04-03 01:28:12,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 729 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:28:12,051 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 699 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:12,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 836 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:28:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117625 states. [2023-04-03 01:28:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117625 to 113941. [2023-04-03 01:28:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113941 states, 78854 states have (on average 1.419610926522434) internal successors, (111942), 86664 states have internal predecessors, (111942), 20811 states have call successors, (20811), 14598 states have call predecessors, (20811), 14275 states have return successors, (31041), 18567 states have call predecessors, (31041), 20807 states have call successors, (31041) [2023-04-03 01:28:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113941 states to 113941 states and 163794 transitions. [2023-04-03 01:28:19,042 INFO L78 Accepts]: Start accepts. Automaton has 113941 states and 163794 transitions. Word has length 362 [2023-04-03 01:28:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:19,044 INFO L495 AbstractCegarLoop]: Abstraction has 113941 states and 163794 transitions. [2023-04-03 01:28:19,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-03 01:28:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 113941 states and 163794 transitions. [2023-04-03 01:28:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:28:19,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:19,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:19,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:20,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 01:28:20,104 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:20,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2050084808, now seen corresponding path program 1 times [2023-04-03 01:28:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734282511] [2023-04-03 01:28:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-04-03 01:28:20,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734282511] [2023-04-03 01:28:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734282511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830388190] [2023-04-03 01:28:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:20,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:20,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:20,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:20,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-03 01:28:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:21,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:28:21,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:28:21,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830388190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:21,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:28:21,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497100847] [2023-04-03 01:28:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:21,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:28:21,473 INFO L87 Difference]: Start difference. First operand 113941 states and 163794 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:28:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:35,053 INFO L93 Difference]: Finished difference Result 340062 states and 530109 transitions. [2023-04-03 01:28:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:28:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 362 [2023-04-03 01:28:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:36,885 INFO L225 Difference]: With dead ends: 340062 [2023-04-03 01:28:36,886 INFO L226 Difference]: Without dead ends: 226138 [2023-04-03 01:28:38,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 375 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 01:28:38,558 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 311 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:38,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 951 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:28:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226138 states. [2023-04-03 01:28:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226138 to 225430. [2023-04-03 01:28:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225430 states, 156230 states have (on average 1.412110350124816) internal successors, (220614), 171272 states have internal predecessors, (220614), 41100 states have call successors, (41100), 29062 states have call predecessors, (41100), 28099 states have return successors, (77175), 36233 states have call predecessors, (77175), 41096 states have call successors, (77175) [2023-04-03 01:28:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225430 states to 225430 states and 338889 transitions. [2023-04-03 01:28:54,252 INFO L78 Accepts]: Start accepts. Automaton has 225430 states and 338889 transitions. Word has length 362 [2023-04-03 01:28:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:54,253 INFO L495 AbstractCegarLoop]: Abstraction has 225430 states and 338889 transitions. [2023-04-03 01:28:54,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-03 01:28:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 225430 states and 338889 transitions. [2023-04-03 01:28:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:28:56,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:56,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-04-03 01:28:56,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-03 01:28:56,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-03 01:28:56,480 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:56,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1277680327, now seen corresponding path program 1 times [2023-04-03 01:28:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868534847] [2023-04-03 01:28:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-03 01:28:57,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868534847] [2023-04-03 01:28:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868534847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:28:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8083961] [2023-04-03 01:28:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:28:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:57,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:28:57,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-03 01:28:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:57,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:28:57,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:28:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-04-03 01:28:57,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:28:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8083961] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:57,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:28:57,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-03 01:28:57,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061013573] [2023-04-03 01:28:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:28:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:28:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:28:57,534 INFO L87 Difference]: Start difference. First operand 225430 states and 338889 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (38), 2 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:29:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:29:11,308 INFO L93 Difference]: Finished difference Result 338654 states and 507050 transitions. [2023-04-03 01:29:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:29:11,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (38), 2 states have call predecessors, (38), 3 states have call successors, (38) Word has length 362 [2023-04-03 01:29:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:29:12,820 INFO L225 Difference]: With dead ends: 338654 [2023-04-03 01:29:12,821 INFO L226 Difference]: Without dead ends: 225625 [2023-04-03 01:29:13,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:29:13,884 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 286 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:29:13,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 640 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:29:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225625 states. [2023-04-03 01:29:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225625 to 225429. [2023-04-03 01:29:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225429 states, 156230 states have (on average 1.4063752160276515) internal successors, (219718), 171272 states have internal predecessors, (219718), 41099 states have call successors, (41099), 29062 states have call predecessors, (41099), 28099 states have return successors, (68085), 36231 states have call predecessors, (68085), 41095 states have call successors, (68085) [2023-04-03 01:29:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225429 states to 225429 states and 328902 transitions. [2023-04-03 01:29:29,043 INFO L78 Accepts]: Start accepts. Automaton has 225429 states and 328902 transitions. Word has length 362 [2023-04-03 01:29:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:29:29,043 INFO L495 AbstractCegarLoop]: Abstraction has 225429 states and 328902 transitions. [2023-04-03 01:29:29,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (38), 2 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-03 01:29:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 225429 states and 328902 transitions. [2023-04-03 01:29:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-03 01:29:31,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:29:31,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:29:31,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-03 01:29:31,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-03 01:29:31,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:29:31,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:29:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1380352906, now seen corresponding path program 1 times [2023-04-03 01:29:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:29:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869441141] [2023-04-03 01:29:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:29:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-04-03 01:29:32,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:29:32,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869441141] [2023-04-03 01:29:32,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869441141] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:29:32,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387373013] [2023-04-03 01:29:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:32,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:29:32,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:29:32,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:29:32,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-03 01:29:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:33,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:29:33,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:29:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-03 01:29:33,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:29:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387373013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:29:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:29:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:29:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227737452] [2023-04-03 01:29:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:29:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:29:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:29:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:29:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:29:33,299 INFO L87 Difference]: Start difference. First operand 225429 states and 328902 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41)