/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 EqDomain -i ../sv-benchmarks/c/systemc/token_ring.11.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:17:21,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:17:21,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:17:21,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:17:21,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:17:21,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:17:21,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:17:21,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:17:21,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:17:21,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:17:21,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:17:21,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:17:21,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:17:21,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:17:21,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:17:21,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:17:21,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:17:21,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:17:21,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:17:21,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:17:21,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:17:21,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:17:21,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:17:21,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:17:21,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:17:21,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:17:21,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:17:21,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:17:21,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:17:21,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:17:21,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:17:21,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:17:21,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:17:21,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:17:21,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:17:21,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:17:21,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:17:21,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:17:21,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:17:21,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:17:21,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:17:21,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:17:21,772 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:17:21,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:17:21,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:17:21,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:17:21,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:17:21,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:17:21,774 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:17:21,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:17:21,774 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:17:21,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:17:21,775 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:17:21,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:17:21,776 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:17:21,776 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:17:21,776 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:17:21,776 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:17:21,776 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:17:21,776 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:17:21,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:17:21,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:17:21,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:17:21,778 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:17:21,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:17:21,778 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:17:21,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:17:21,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:17:21,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:17:21,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:17:21,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:17:21,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:17:21,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:17:22,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:17:22,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:17:22,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:17:22,004 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:17:22,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2023-04-01 12:17:23,225 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:17:23,438 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:17:23,438 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2023-04-01 12:17:23,451 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760adc84/4974d71af59744a1be72b8256ac348d4/FLAGce7fd3c87 [2023-04-01 12:17:23,464 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760adc84/4974d71af59744a1be72b8256ac348d4 [2023-04-01 12:17:23,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:17:23,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:17:23,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:17:23,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:17:23,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:17:23,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e785e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23, skipping insertion in model container [2023-04-01 12:17:23,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:17:23,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:17:23,649 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.11.cil-2.c[671,684] [2023-04-01 12:17:23,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:17:23,780 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:17:23,795 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.11.cil-2.c[671,684] [2023-04-01 12:17:23,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:17:23,900 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:17:23,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23 WrapperNode [2023-04-01 12:17:23,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:17:23,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:17:23,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:17:23,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:17:23,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:23,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:24,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:17:24,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:17:24,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:17:24,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:17:24,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (1/1) ... [2023-04-01 12:17:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:17:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:24,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:17:24,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:17:24,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:17:24,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:17:24,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:17:24,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 12:17:24,082 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 12:17:24,082 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 12:17:24,083 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 12:17:24,083 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 12:17:24,083 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 12:17:24,083 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-01 12:17:24,083 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 12:17:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 12:17:24,085 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 12:17:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 12:17:24,087 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 12:17:24,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:17:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:17:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:17:24,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:17:24,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 12:17:24,089 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 12:17:24,090 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-01 12:17:24,090 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-01 12:17:24,090 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-01 12:17:24,090 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-01 12:17:24,091 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-01 12:17:24,091 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2023-04-01 12:17:24,091 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 12:17:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 12:17:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-01 12:17:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-01 12:17:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-01 12:17:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-01 12:17:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 12:17:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 12:17:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 12:17:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 12:17:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 12:17:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 12:17:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:17:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:17:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:17:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:17:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:17:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:17:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:17:24,244 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:17:24,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:17:25,029 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:17:25,415 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:17:25,415 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-04-01 12:17:25,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:25 BoogieIcfgContainer [2023-04-01 12:17:25,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:17:25,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:17:25,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:17:25,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:17:25,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:17:23" (1/3) ... [2023-04-01 12:17:25,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c1e02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:25, skipping insertion in model container [2023-04-01 12:17:25,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:23" (2/3) ... [2023-04-01 12:17:25,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c1e02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:25, skipping insertion in model container [2023-04-01 12:17:25,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:25" (3/3) ... [2023-04-01 12:17:25,429 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2023-04-01 12:17:25,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:17:25,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:17:25,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:17:25,523 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;@4dbc264d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:17:25,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:17:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 278 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 193 states have internal predecessors, (257), 59 states have call successors, (59), 40 states have call predecessors, (59), 40 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-04-01 12:17:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 12:17:25,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:25,544 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] [2023-04-01 12:17:25,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:25,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash -860484613, now seen corresponding path program 1 times [2023-04-01 12:17:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:25,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239640421] [2023-04-01 12:17:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:17:26,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239640421] [2023-04-01 12:17:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239640421] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:17:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:17:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855733632] [2023-04-01 12:17:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:17:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:17:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:17:26,493 INFO L87 Difference]: Start difference. First operand has 278 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 193 states have internal predecessors, (257), 59 states have call successors, (59), 40 states have call predecessors, (59), 40 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-01 12:17:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:27,302 INFO L93 Difference]: Finished difference Result 791 states and 1134 transitions. [2023-04-01 12:17:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:17:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 126 [2023-04-01 12:17:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:27,316 INFO L225 Difference]: With dead ends: 791 [2023-04-01 12:17:27,317 INFO L226 Difference]: Without dead ends: 517 [2023-04-01 12:17:27,322 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 [2023-04-01 12:17:27,325 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 666 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:27,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 958 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:17:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-04-01 12:17:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 516. [2023-04-01 12:17:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 337 states have (on average 1.4213649851632046) internal successors, (479), 364 states have internal predecessors, (479), 108 states have call successors, (108), 74 states have call predecessors, (108), 70 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2023-04-01 12:17:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 693 transitions. [2023-04-01 12:17:27,407 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 693 transitions. Word has length 126 [2023-04-01 12:17:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:27,407 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 693 transitions. [2023-04-01 12:17:27,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-01 12:17:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 693 transitions. [2023-04-01 12:17:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-04-01 12:17:27,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:27,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:17:27,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:27,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1593596157, now seen corresponding path program 1 times [2023-04-01 12:17:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40637374] [2023-04-01 12:17:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-01 12:17:27,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40637374] [2023-04-01 12:17:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40637374] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932217826] [2023-04-01 12:17:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:27,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:17:27,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:17:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:28,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 12:17:28,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 12:17:28,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:28,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932217826] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:28,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:28,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789258735] [2023-04-01 12:17:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:28,506 INFO L87 Difference]: Start difference. First operand 516 states and 693 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-01 12:17:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:28,662 INFO L93 Difference]: Finished difference Result 886 states and 1223 transitions. [2023-04-01 12:17:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:28,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 241 [2023-04-01 12:17:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:28,668 INFO L225 Difference]: With dead ends: 886 [2023-04-01 12:17:28,668 INFO L226 Difference]: Without dead ends: 632 [2023-04-01 12:17:28,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:28,670 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 144 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:28,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 775 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-04-01 12:17:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 600. [2023-04-01 12:17:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 397 states have (on average 1.4710327455919396) internal successors, (584), 435 states have internal predecessors, (584), 120 states have call successors, (120), 86 states have call predecessors, (120), 82 states have return successors, (129), 115 states have call predecessors, (129), 117 states have call successors, (129) [2023-04-01 12:17:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 833 transitions. [2023-04-01 12:17:28,715 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 833 transitions. Word has length 241 [2023-04-01 12:17:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:28,716 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 833 transitions. [2023-04-01 12:17:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-01 12:17:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 833 transitions. [2023-04-01 12:17:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:28,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:28,725 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, 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] [2023-04-01 12:17:28,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:28,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:28,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1123001130, now seen corresponding path program 1 times [2023-04-01 12:17:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:28,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931044451] [2023-04-01 12:17:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:28,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:29,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931044451] [2023-04-01 12:17:29,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931044451] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:29,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802127709] [2023-04-01 12:17:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:29,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:29,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:17:29,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:17:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:30,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 12:17:30,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 12:17:30,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:30,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802127709] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:30,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:30,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501046321] [2023-04-01 12:17:30,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:30,114 INFO L87 Difference]: Start difference. First operand 600 states and 833 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 12:17:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:30,244 INFO L93 Difference]: Finished difference Result 1385 states and 1958 transitions. [2023-04-01 12:17:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 338 [2023-04-01 12:17:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:30,251 INFO L225 Difference]: With dead ends: 1385 [2023-04-01 12:17:30,251 INFO L226 Difference]: Without dead ends: 801 [2023-04-01 12:17:30,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:30,255 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 323 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:30,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 409 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-04-01 12:17:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2023-04-01 12:17:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 544 states have (on average 1.4227941176470589) internal successors, (774), 582 states have internal predecessors, (774), 146 states have call successors, (146), 114 states have call predecessors, (146), 110 states have return successors, (155), 141 states have call predecessors, (155), 143 states have call successors, (155) [2023-04-01 12:17:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1075 transitions. [2023-04-01 12:17:30,314 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1075 transitions. Word has length 338 [2023-04-01 12:17:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:30,315 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1075 transitions. [2023-04-01 12:17:30,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 12:17:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1075 transitions. [2023-04-01 12:17:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:30,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:30,323 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, 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] [2023-04-01 12:17:30,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:30,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 12:17:30,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:30,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:30,534 INFO L85 PathProgramCache]: Analyzing trace with hash 90809802, now seen corresponding path program 1 times [2023-04-01 12:17:30,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:30,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692370288] [2023-04-01 12:17:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:30,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-04-01 12:17:31,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:31,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692370288] [2023-04-01 12:17:31,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692370288] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:31,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311458685] [2023-04-01 12:17:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:31,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:17:31,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:17:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:31,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:31,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 12:17:31,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311458685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:31,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505400342] [2023-04-01 12:17:31,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:31,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:31,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:31,701 INFO L87 Difference]: Start difference. First operand 801 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-04-01 12:17:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:31,917 INFO L93 Difference]: Finished difference Result 2358 states and 3322 transitions. [2023-04-01 12:17:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 338 [2023-04-01 12:17:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:31,929 INFO L225 Difference]: With dead ends: 2358 [2023-04-01 12:17:31,929 INFO L226 Difference]: Without dead ends: 1574 [2023-04-01 12:17:31,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:31,934 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 255 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:31,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 824 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2023-04-01 12:17:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1566. [2023-04-01 12:17:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1071 states have (on average 1.4183006535947713) internal successors, (1519), 1143 states have internal predecessors, (1519), 280 states have call successors, (280), 221 states have call predecessors, (280), 214 states have return successors, (370), 272 states have call predecessors, (370), 277 states have call successors, (370) [2023-04-01 12:17:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2169 transitions. [2023-04-01 12:17:32,032 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2169 transitions. Word has length 338 [2023-04-01 12:17:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:32,033 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2169 transitions. [2023-04-01 12:17:32,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-04-01 12:17:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2169 transitions. [2023-04-01 12:17:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-04-01 12:17:32,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:32,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-04-01 12:17:32,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:32,253 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 [2023-04-01 12:17:32,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:32,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1191184054, now seen corresponding path program 1 times [2023-04-01 12:17:32,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:32,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984007] [2023-04-01 12:17:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:32,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:32,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984007] [2023-04-01 12:17:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879626801] [2023-04-01 12:17:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:32,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:32,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:17:32,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 12:17:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:33,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:33,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 12:17:33,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:33,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879626801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:33,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993763825] [2023-04-01 12:17:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:33,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:33,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:33,338 INFO L87 Difference]: Start difference. First operand 1566 states and 2169 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-04-01 12:17:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:33,544 INFO L93 Difference]: Finished difference Result 2350 states and 3216 transitions. [2023-04-01 12:17:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 339 [2023-04-01 12:17:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:33,553 INFO L225 Difference]: With dead ends: 2350 [2023-04-01 12:17:33,553 INFO L226 Difference]: Without dead ends: 1570 [2023-04-01 12:17:33,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:33,557 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 244 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:33,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 632 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2023-04-01 12:17:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1565. [2023-04-01 12:17:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1071 states have (on average 1.411764705882353) internal successors, (1512), 1143 states have internal predecessors, (1512), 279 states have call successors, (279), 221 states have call predecessors, (279), 214 states have return successors, (301), 270 states have call predecessors, (301), 276 states have call successors, (301) [2023-04-01 12:17:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2092 transitions. [2023-04-01 12:17:33,650 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2092 transitions. Word has length 339 [2023-04-01 12:17:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:33,651 INFO L495 AbstractCegarLoop]: Abstraction has 1565 states and 2092 transitions. [2023-04-01 12:17:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-04-01 12:17:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2092 transitions. [2023-04-01 12:17:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:33,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:33,659 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, 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] [2023-04-01 12:17:33,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 12:17:33,869 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 [2023-04-01 12:17:33,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:33,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash -546203701, now seen corresponding path program 1 times [2023-04-01 12:17:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330980602] [2023-04-01 12:17:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:33,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:34,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330980602] [2023-04-01 12:17:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330980602] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575193557] [2023-04-01 12:17:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:34,413 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) [2023-04-01 12:17:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 12:17:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:34,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:34,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-01 12:17:34,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575193557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025829629] [2023-04-01 12:17:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:34,997 INFO L87 Difference]: Start difference. First operand 1565 states and 2092 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-04-01 12:17:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:35,252 INFO L93 Difference]: Finished difference Result 4640 states and 6357 transitions. [2023-04-01 12:17:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 338 [2023-04-01 12:17:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:35,271 INFO L225 Difference]: With dead ends: 4640 [2023-04-01 12:17:35,271 INFO L226 Difference]: Without dead ends: 3091 [2023-04-01 12:17:35,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:35,280 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 275 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:35,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 586 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2023-04-01 12:17:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 3082. [2023-04-01 12:17:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2118 states have (on average 1.4060434372049102) internal successors, (2978), 2255 states have internal predecessors, (2978), 544 states have call successors, (544), 436 states have call predecessors, (544), 419 states have return successors, (598), 523 states have call predecessors, (598), 541 states have call successors, (598) [2023-04-01 12:17:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4120 transitions. [2023-04-01 12:17:35,489 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4120 transitions. Word has length 338 [2023-04-01 12:17:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:35,491 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4120 transitions. [2023-04-01 12:17:35,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-04-01 12:17:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4120 transitions. [2023-04-01 12:17:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:35,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:35,502 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, 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] [2023-04-01 12:17:35,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:35,712 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 [2023-04-01 12:17:35,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:35,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1171203338, now seen corresponding path program 1 times [2023-04-01 12:17:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:35,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163635847] [2023-04-01 12:17:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:35,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:36,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163635847] [2023-04-01 12:17:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163635847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845014518] [2023-04-01 12:17:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:36,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:36,238 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) [2023-04-01 12:17:36,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 12:17:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:36,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:36,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-04-01 12:17:36,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845014518] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:36,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186120286] [2023-04-01 12:17:36,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:36,778 INFO L87 Difference]: Start difference. First operand 3082 states and 4120 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 12:17:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:37,154 INFO L93 Difference]: Finished difference Result 9169 states and 12569 transitions. [2023-04-01 12:17:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) Word has length 338 [2023-04-01 12:17:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:37,191 INFO L225 Difference]: With dead ends: 9169 [2023-04-01 12:17:37,191 INFO L226 Difference]: Without dead ends: 6103 [2023-04-01 12:17:37,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:37,211 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 317 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:37,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 602 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6103 states. [2023-04-01 12:17:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6103 to 6088. [2023-04-01 12:17:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 4194 states have (on average 1.3996185026227945) internal successors, (5870), 4455 states have internal predecessors, (5870), 1070 states have call successors, (1070), 866 states have call predecessors, (1070), 823 states have return successors, (1204), 1019 states have call predecessors, (1204), 1067 states have call successors, (1204) [2023-04-01 12:17:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 8144 transitions. [2023-04-01 12:17:37,602 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 8144 transitions. Word has length 338 [2023-04-01 12:17:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 6088 states and 8144 transitions. [2023-04-01 12:17:37,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 12:17:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 8144 transitions. [2023-04-01 12:17:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:37,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:37,625 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, 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] [2023-04-01 12:17:37,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 12:17:37,835 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 [2023-04-01 12:17:37,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:37,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -586763383, now seen corresponding path program 1 times [2023-04-01 12:17:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:37,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190194001] [2023-04-01 12:17:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:38,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190194001] [2023-04-01 12:17:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190194001] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159974906] [2023-04-01 12:17:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:38,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:38,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:38,341 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) [2023-04-01 12:17:38,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 12:17:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:38,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:38,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 12:17:38,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:38,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159974906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:38,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:38,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547226716] [2023-04-01 12:17:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:38,925 INFO L87 Difference]: Start difference. First operand 6088 states and 8144 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 3 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) [2023-04-01 12:17:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:39,563 INFO L93 Difference]: Finished difference Result 18143 states and 24923 transitions. [2023-04-01 12:17:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 3 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) Word has length 338 [2023-04-01 12:17:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:39,650 INFO L225 Difference]: With dead ends: 18143 [2023-04-01 12:17:39,650 INFO L226 Difference]: Without dead ends: 12071 [2023-04-01 12:17:39,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:39,693 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 254 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:39,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 586 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12071 states. [2023-04-01 12:17:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12071 to 12044. [2023-04-01 12:17:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12044 states, 8310 states have (on average 1.3927797833935018) internal successors, (11574), 8807 states have internal predecessors, (11574), 2114 states have call successors, (2114), 1726 states have call predecessors, (2114), 1619 states have return successors, (2458), 1991 states have call predecessors, (2458), 2111 states have call successors, (2458) [2023-04-01 12:17:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12044 states to 12044 states and 16146 transitions. [2023-04-01 12:17:40,592 INFO L78 Accepts]: Start accepts. Automaton has 12044 states and 16146 transitions. Word has length 338 [2023-04-01 12:17:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:40,592 INFO L495 AbstractCegarLoop]: Abstraction has 12044 states and 16146 transitions. [2023-04-01 12:17:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 3 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) [2023-04-01 12:17:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 12044 states and 16146 transitions. [2023-04-01 12:17:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:40,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:40,643 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, 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] [2023-04-01 12:17:40,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 12:17:40,852 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 [2023-04-01 12:17:40,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:40,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash -762059199, now seen corresponding path program 1 times [2023-04-01 12:17:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826123524] [2023-04-01 12:17:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:17:41,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:41,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826123524] [2023-04-01 12:17:41,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826123524] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:41,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686664653] [2023-04-01 12:17:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:41,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:41,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:41,256 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) [2023-04-01 12:17:41,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 12:17:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:41,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:41,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 12:17:41,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:41,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686664653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:41,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:41,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704079950] [2023-04-01 12:17:41,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:41,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:41,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:41,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:41,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:41,769 INFO L87 Difference]: Start difference. First operand 12044 states and 16146 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 12:17:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:43,150 INFO L93 Difference]: Finished difference Result 35907 states and 50792 transitions. [2023-04-01 12:17:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:43,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 338 [2023-04-01 12:17:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:43,304 INFO L225 Difference]: With dead ends: 35907 [2023-04-01 12:17:43,305 INFO L226 Difference]: Without dead ends: 23880 [2023-04-01 12:17:43,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:43,410 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 285 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:43,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 856 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23880 states. [2023-04-01 12:17:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23880 to 23797. [2023-04-01 12:17:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23797 states, 16438 states have (on average 1.3835016425355882) internal successors, (22742), 17383 states have internal predecessors, (22742), 4171 states have call successors, (4171), 3430 states have call predecessors, (4171), 3187 states have return successors, (5978), 3897 states have call predecessors, (5978), 4168 states have call successors, (5978) [2023-04-01 12:17:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23797 states to 23797 states and 32891 transitions. [2023-04-01 12:17:45,031 INFO L78 Accepts]: Start accepts. Automaton has 23797 states and 32891 transitions. Word has length 338 [2023-04-01 12:17:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:45,032 INFO L495 AbstractCegarLoop]: Abstraction has 23797 states and 32891 transitions. [2023-04-01 12:17:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-04-01 12:17:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 23797 states and 32891 transitions. [2023-04-01 12:17:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:45,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:45,148 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, 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] [2023-04-01 12:17:45,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:45,360 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 [2023-04-01 12:17:45,361 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:45,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1701479199, now seen corresponding path program 1 times [2023-04-01 12:17:45,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:45,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808516321] [2023-04-01 12:17:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-04-01 12:17:45,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:45,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808516321] [2023-04-01 12:17:45,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808516321] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:45,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656786275] [2023-04-01 12:17:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:45,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:45,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:45,777 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) [2023-04-01 12:17:45,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 12:17:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:46,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:46,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 12:17:46,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656786275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:46,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:46,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936262404] [2023-04-01 12:17:46,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:46,375 INFO L87 Difference]: Start difference. First operand 23797 states and 32891 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 12:17:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:48,557 INFO L93 Difference]: Finished difference Result 71005 states and 102145 transitions. [2023-04-01 12:17:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) Word has length 338 [2023-04-01 12:17:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:48,846 INFO L225 Difference]: With dead ends: 71005 [2023-04-01 12:17:48,847 INFO L226 Difference]: Without dead ends: 47224 [2023-04-01 12:17:49,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:49,021 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 282 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:49,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 586 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47224 states. [2023-04-01 12:17:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47224 to 47125. [2023-04-01 12:17:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47125 states, 32582 states have (on average 1.3761586151862992) internal successors, (44838), 34375 states have internal predecessors, (44838), 8267 states have call successors, (8267), 6854 states have call predecessors, (8267), 6275 states have return successors, (12500), 7625 states have call predecessors, (12500), 8264 states have call successors, (12500) [2023-04-01 12:17:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47125 states to 47125 states and 65605 transitions. [2023-04-01 12:17:52,679 INFO L78 Accepts]: Start accepts. Automaton has 47125 states and 65605 transitions. Word has length 338 [2023-04-01 12:17:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:52,681 INFO L495 AbstractCegarLoop]: Abstraction has 47125 states and 65605 transitions. [2023-04-01 12:17:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (33), 2 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 12:17:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47125 states and 65605 transitions. [2023-04-01 12:17:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:17:52,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:52,932 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, 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] [2023-04-01 12:17:52,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:53,144 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 [2023-04-01 12:17:53,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:53,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1848344928, now seen corresponding path program 1 times [2023-04-01 12:17:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630208494] [2023-04-01 12:17:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-04-01 12:17:53,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:53,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630208494] [2023-04-01 12:17:53,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630208494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:53,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115515270] [2023-04-01 12:17:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:53,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:53,567 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) [2023-04-01 12:17:53,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 12:17:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:54,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:54,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-04-01 12:17:54,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115515270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:54,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699442034] [2023-04-01 12:17:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:54,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:54,211 INFO L87 Difference]: Start difference. First operand 47125 states and 65605 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 12:17:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:58,630 INFO L93 Difference]: Finished difference Result 140637 states and 205019 transitions. [2023-04-01 12:17:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 338 [2023-04-01 12:17:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:59,222 INFO L225 Difference]: With dead ends: 140637 [2023-04-01 12:17:59,222 INFO L226 Difference]: Without dead ends: 93528 [2023-04-01 12:17:59,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:59,708 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 303 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:59,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 586 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93528 states. [2023-04-01 12:18:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93528 to 93333. [2023-04-01 12:18:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93333 states, 64582 states have (on average 1.3686476107893841) internal successors, (88390), 67975 states have internal predecessors, (88390), 16395 states have call successors, (16395), 13702 states have call predecessors, (16395), 12355 states have return successors, (26826), 14921 states have call predecessors, (26826), 16392 states have call successors, (26826) [2023-04-01 12:18:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93333 states to 93333 states and 131611 transitions. [2023-04-01 12:18:05,906 INFO L78 Accepts]: Start accepts. Automaton has 93333 states and 131611 transitions. Word has length 338 [2023-04-01 12:18:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:05,907 INFO L495 AbstractCegarLoop]: Abstraction has 93333 states and 131611 transitions. [2023-04-01 12:18:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 12:18:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 93333 states and 131611 transitions. [2023-04-01 12:18:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 12:18:06,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:06,780 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, 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] [2023-04-01 12:18:06,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 12:18:06,991 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 [2023-04-01 12:18:06,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:06,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2040745600, now seen corresponding path program 1 times [2023-04-01 12:18:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533347775] [2023-04-01 12:18:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-01 12:18:07,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533347775] [2023-04-01 12:18:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533347775] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:18:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791236730] [2023-04-01 12:18:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:07,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:18:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:18:07,457 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) [2023-04-01 12:18:07,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 12:18:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:07,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:18:07,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:18:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-04-01 12:18:08,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:18:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791236730] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:08,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:18:08,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:18:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116781996] [2023-04-01 12:18:08,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:18:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:18:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:18:08,074 INFO L87 Difference]: Start difference. First operand 93333 states and 131611 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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)