/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.09.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:17:07,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:17:07,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:17:07,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:17:07,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:17:07,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:17:07,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:17:07,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:17:07,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:17:07,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:17:07,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:17:07,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:17:07,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:17:07,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:17:07,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:17:07,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:17:07,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:17:07,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:17:07,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:17:08,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:17:08,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:17:08,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:17:08,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:17:08,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:17:08,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:17:08,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:17:08,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:17:08,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:17:08,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:17:08,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:17:08,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:17:08,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:17:08,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:17:08,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:17:08,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:17:08,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:17:08,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:17:08,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:17:08,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:17:08,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:17:08,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:17:08,025 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 12:17:08,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:17:08,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:17:08,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:17:08,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:17:08,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:17:08,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:17:08,061 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:17:08,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:17:08,062 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:17:08,063 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:17:08,063 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:17:08,063 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:17:08,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:17:08,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:17:08,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:17:08,065 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:17:08,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:17:08,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:17:08,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:17:08,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:17:08,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:17:08,065 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:17:08,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:17:08,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:17:08,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:17:08,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:17:08,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:17:08,315 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:17:08,316 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:17:08,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2023-04-01 12:17:09,577 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:17:09,832 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:17:09,832 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2023-04-01 12:17:09,842 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e93882c/86a891d16edd4684b8e915c0a4bfc8bf/FLAGf430a32f3 [2023-04-01 12:17:09,854 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e93882c/86a891d16edd4684b8e915c0a4bfc8bf [2023-04-01 12:17:09,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:17:09,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:17:09,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:17:09,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:17:09,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:17:09,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:09" (1/1) ... [2023-04-01 12:17:09,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca74e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:09, skipping insertion in model container [2023-04-01 12:17:09,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:09" (1/1) ... [2023-04-01 12:17:09,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:17:09,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:17:10,028 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.09.cil-1.c[671,684] [2023-04-01 12:17:10,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:17:10,150 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:17:10,158 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.09.cil-1.c[671,684] [2023-04-01 12:17:10,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:17:10,221 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:17:10,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10 WrapperNode [2023-04-01 12:17:10,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:17:10,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:17:10,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:17:10,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:17:10,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,300 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:17:10,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:17:10,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:17:10,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:17:10,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (1/1) ... [2023-04-01 12:17:10,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:17:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:10,348 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 12:17:10,350 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 12:17:10,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:17:10,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:17:10,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:17:10,385 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2023-04-01 12:17:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-01 12:17:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 12:17:10,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 12:17:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:17:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 12:17:10,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 12:17:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:17:10,392 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 12:17:10,392 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 12:17:10,392 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 12:17:10,392 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 12:17:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 12:17:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 12:17:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:17:10,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:17:10,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:17:10,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:17:10,554 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:17:10,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:17:11,185 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:17:11,525 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:17:11,525 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-04-01 12:17:11,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:11 BoogieIcfgContainer [2023-04-01 12:17:11,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:17:11,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:17:11,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:17:11,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:17:11,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:17:09" (1/3) ... [2023-04-01 12:17:11,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d704b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:11, skipping insertion in model container [2023-04-01 12:17:11,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:10" (2/3) ... [2023-04-01 12:17:11,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d704b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:11, skipping insertion in model container [2023-04-01 12:17:11,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:11" (3/3) ... [2023-04-01 12:17:11,541 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-1.c [2023-04-01 12:17:11,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:17:11,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:17:11,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:17:11,613 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;@3c2e8394, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:17:11,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:17:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 153 states have (on average 1.4444444444444444) internal successors, (221), 167 states have internal predecessors, (221), 53 states have call successors, (53), 36 states have call predecessors, (53), 36 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-04-01 12:17:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 12:17:11,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:11,634 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] [2023-04-01 12:17:11,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:11,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1238101312, now seen corresponding path program 1 times [2023-04-01 12:17:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615843084] [2023-04-01 12:17:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:12,420 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 12:17:12,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615843084] [2023-04-01 12:17:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615843084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:12,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:17:12,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:17:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306426518] [2023-04-01 12:17:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:12,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:17:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:17:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:17:12,482 INFO L87 Difference]: Start difference. First operand has 244 states, 153 states have (on average 1.4444444444444444) internal successors, (221), 167 states have internal predecessors, (221), 53 states have call successors, (53), 36 states have call predecessors, (53), 36 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-01 12:17:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:13,173 INFO L93 Difference]: Finished difference Result 689 states and 982 transitions. [2023-04-01 12:17:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:17:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2023-04-01 12:17:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:13,195 INFO L225 Difference]: With dead ends: 689 [2023-04-01 12:17:13,196 INFO L226 Difference]: Without dead ends: 449 [2023-04-01 12:17:13,204 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 12:17:13,211 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 574 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:13,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 822 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:17:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-04-01 12:17:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 448. [2023-04-01 12:17:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 289 states have (on average 1.4083044982698962) internal successors, (407), 312 states have internal predecessors, (407), 96 states have call successors, (96), 66 states have call predecessors, (96), 62 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2023-04-01 12:17:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 597 transitions. [2023-04-01 12:17:13,301 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 597 transitions. Word has length 112 [2023-04-01 12:17:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 597 transitions. [2023-04-01 12:17:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2023-04-01 12:17:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 597 transitions. [2023-04-01 12:17:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-01 12:17:13,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:13,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:17:13,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:13,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1171705969, now seen corresponding path program 1 times [2023-04-01 12:17:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:13,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011258252] [2023-04-01 12:17:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:13,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 12:17:13,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011258252] [2023-04-01 12:17:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011258252] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841763763] [2023-04-01 12:17:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:13,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:13,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:13,777 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 12:17:13,809 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 12:17:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:14,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 12:17:14,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:14,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841763763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:14,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136653735] [2023-04-01 12:17:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:14,272 INFO L87 Difference]: Start difference. First operand 448 states and 597 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-01 12:17:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:14,455 INFO L93 Difference]: Finished difference Result 768 states and 1051 transitions. [2023-04-01 12:17:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 211 [2023-04-01 12:17:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:14,464 INFO L225 Difference]: With dead ends: 768 [2023-04-01 12:17:14,464 INFO L226 Difference]: Without dead ends: 548 [2023-04-01 12:17:14,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 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 12:17:14,466 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 122 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:14,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 669 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-04-01 12:17:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2023-04-01 12:17:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 339 states have (on average 1.4572271386430677) internal successors, (494), 371 states have internal predecessors, (494), 106 states have call successors, (106), 76 states have call predecessors, (106), 72 states have return successors, (113), 101 states have call predecessors, (113), 103 states have call successors, (113) [2023-04-01 12:17:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 713 transitions. [2023-04-01 12:17:14,536 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 713 transitions. Word has length 211 [2023-04-01 12:17:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:14,539 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 713 transitions. [2023-04-01 12:17:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-01 12:17:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 713 transitions. [2023-04-01 12:17:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:14,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:14,547 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:14,558 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 12:17:14,755 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 12:17:14,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:14,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash -80808551, now seen corresponding path program 1 times [2023-04-01 12:17:14,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731083910] [2023-04-01 12:17:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-04-01 12:17:15,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731083910] [2023-04-01 12:17:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731083910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097572716] [2023-04-01 12:17:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:15,297 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 12:17:15,303 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 12:17:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:15,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:15,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:15,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:15,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097572716] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:15,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:15,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876912360] [2023-04-01 12:17:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:15,812 INFO L87 Difference]: Start difference. First operand 518 states and 713 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:15,978 INFO L93 Difference]: Finished difference Result 1511 states and 2210 transitions. [2023-04-01 12:17:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2023-04-01 12:17:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:15,989 INFO L225 Difference]: With dead ends: 1511 [2023-04-01 12:17:15,992 INFO L226 Difference]: Without dead ends: 1010 [2023-04-01 12:17:15,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 12:17:15,997 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 245 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:15,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 706 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2023-04-01 12:17:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1002. [2023-04-01 12:17:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 663 states have (on average 1.4524886877828054) internal successors, (963), 723 states have internal predecessors, (963), 200 states have call successors, (200), 145 states have call predecessors, (200), 138 states have return successors, (272), 192 states have call predecessors, (272), 197 states have call successors, (272) [2023-04-01 12:17:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1435 transitions. [2023-04-01 12:17:16,123 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1435 transitions. Word has length 294 [2023-04-01 12:17:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:16,124 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1435 transitions. [2023-04-01 12:17:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1435 transitions. [2023-04-01 12:17:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:16,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:16,130 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, 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] [2023-04-01 12:17:16,143 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 12:17:16,340 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 12:17:16,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:16,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:16,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1735683945, now seen corresponding path program 1 times [2023-04-01 12:17:16,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:16,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091482239] [2023-04-01 12:17:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:16,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-01 12:17:16,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091482239] [2023-04-01 12:17:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091482239] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:16,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014376948] [2023-04-01 12:17:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:16,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:16,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:16,812 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 12:17:16,816 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 12:17:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:17,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:17,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-01 12:17:17,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014376948] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:17,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:17,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:17,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930182946] [2023-04-01 12:17:17,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:17,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:17,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:17,352 INFO L87 Difference]: Start difference. First operand 1002 states and 1435 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-01 12:17:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:17,549 INFO L93 Difference]: Finished difference Result 2954 states and 4409 transitions. [2023-04-01 12:17:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) Word has length 294 [2023-04-01 12:17:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:17,562 INFO L225 Difference]: With dead ends: 2954 [2023-04-01 12:17:17,563 INFO L226 Difference]: Without dead ends: 1968 [2023-04-01 12:17:17,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 12:17:17,571 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 234 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 556 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2023-04-01 12:17:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1959. [2023-04-01 12:17:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1306 states have (on average 1.448698315467075) internal successors, (1892), 1419 states have internal predecessors, (1892), 385 states have call successors, (385), 284 states have call predecessors, (385), 267 states have return successors, (533), 365 states have call predecessors, (533), 382 states have call successors, (533) [2023-04-01 12:17:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2810 transitions. [2023-04-01 12:17:17,714 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2810 transitions. Word has length 294 [2023-04-01 12:17:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:17,715 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 2810 transitions. [2023-04-01 12:17:17,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-01 12:17:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2810 transitions. [2023-04-01 12:17:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:17,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:17,726 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, 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] [2023-04-01 12:17:17,739 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 12:17:17,936 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 12:17:17,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:17,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash 225554040, now seen corresponding path program 1 times [2023-04-01 12:17:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079257701] [2023-04-01 12:17:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-01 12:17:18,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:18,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079257701] [2023-04-01 12:17:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079257701] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695912749] [2023-04-01 12:17:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:18,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:18,423 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 12:17:18,426 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 12:17:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:18,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:18,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-04-01 12:17:19,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:19,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695912749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:19,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:19,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935913275] [2023-04-01 12:17:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:19,057 INFO L87 Difference]: Start difference. First operand 1959 states and 2810 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 12:17:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:19,350 INFO L93 Difference]: Finished difference Result 5807 states and 8683 transitions. [2023-04-01 12:17:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) Word has length 294 [2023-04-01 12:17:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:19,376 INFO L225 Difference]: With dead ends: 5807 [2023-04-01 12:17:19,376 INFO L226 Difference]: Without dead ends: 3864 [2023-04-01 12:17:19,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 12:17:19,391 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 262 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:19,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 535 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2023-04-01 12:17:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3849. [2023-04-01 12:17:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 2578 states have (on average 1.4437548487199379) internal successors, (3722), 2791 states have internal predecessors, (3722), 751 states have call successors, (751), 562 states have call predecessors, (751), 519 states have return successors, (1062), 701 states have call predecessors, (1062), 748 states have call successors, (1062) [2023-04-01 12:17:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5535 transitions. [2023-04-01 12:17:19,659 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5535 transitions. Word has length 294 [2023-04-01 12:17:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:19,659 INFO L495 AbstractCegarLoop]: Abstraction has 3849 states and 5535 transitions. [2023-04-01 12:17:19,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 12:17:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5535 transitions. [2023-04-01 12:17:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:19,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:19,675 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:19,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:19,886 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 12:17:19,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:19,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash -526517702, now seen corresponding path program 1 times [2023-04-01 12:17:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:19,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309696362] [2023-04-01 12:17:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-04-01 12:17:20,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309696362] [2023-04-01 12:17:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309696362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162817857] [2023-04-01 12:17:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:20,255 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 12:17:20,257 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 12:17:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:20,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:20,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 12:17:20,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162817857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827053031] [2023-04-01 12:17:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:20,760 INFO L87 Difference]: Start difference. First operand 3849 states and 5535 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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 12:17:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:21,018 INFO L93 Difference]: Finished difference Result 5787 states and 8225 transitions. [2023-04-01 12:17:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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 294 [2023-04-01 12:17:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:21,041 INFO L225 Difference]: With dead ends: 5787 [2023-04-01 12:17:21,042 INFO L226 Difference]: Without dead ends: 3859 [2023-04-01 12:17:21,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 12:17:21,056 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 220 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:21,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 506 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2023-04-01 12:17:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3848. [2023-04-01 12:17:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 2578 states have (on average 1.4359968968192398) internal successors, (3702), 2791 states have internal predecessors, (3702), 750 states have call successors, (750), 562 states have call predecessors, (750), 519 states have return successors, (868), 699 states have call predecessors, (868), 747 states have call successors, (868) [2023-04-01 12:17:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 5320 transitions. [2023-04-01 12:17:21,272 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 5320 transitions. Word has length 294 [2023-04-01 12:17:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:21,273 INFO L495 AbstractCegarLoop]: Abstraction has 3848 states and 5320 transitions. [2023-04-01 12:17:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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 12:17:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 5320 transitions. [2023-04-01 12:17:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:21,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:21,288 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:21,303 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 12:17:21,498 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 12:17:21,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:21,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -610408637, now seen corresponding path program 1 times [2023-04-01 12:17:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104276140] [2023-04-01 12:17:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:21,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 12:17:22,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104276140] [2023-04-01 12:17:22,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104276140] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937346055] [2023-04-01 12:17:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:22,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:22,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:22,417 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 12:17:22,420 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 12:17:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:22,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:22,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:22,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:22,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937346055] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:22,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:22,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 12:17:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387329117] [2023-04-01 12:17:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:22,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:22,874 INFO L87 Difference]: Start difference. First operand 3848 states and 5320 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:23,360 INFO L93 Difference]: Finished difference Result 11431 states and 16844 transitions. [2023-04-01 12:17:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2023-04-01 12:17:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:23,415 INFO L225 Difference]: With dead ends: 11431 [2023-04-01 12:17:23,415 INFO L226 Difference]: Without dead ends: 7600 [2023-04-01 12:17:23,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:23,450 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 246 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:23,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 732 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2023-04-01 12:17:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 7557. [2023-04-01 12:17:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7557 states, 5078 states have (on average 1.4269397400551398) internal successors, (7246), 5479 states have internal predecessors, (7246), 1467 states have call successors, (1467), 1110 states have call predecessors, (1467), 1011 states have return successors, (2132), 1353 states have call predecessors, (2132), 1464 states have call successors, (2132) [2023-04-01 12:17:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 10845 transitions. [2023-04-01 12:17:23,991 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 10845 transitions. Word has length 294 [2023-04-01 12:17:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:23,992 INFO L495 AbstractCegarLoop]: Abstraction has 7557 states and 10845 transitions. [2023-04-01 12:17:23,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 10845 transitions. [2023-04-01 12:17:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:24,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:24,024 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, 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] [2023-04-01 12:17:24,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:24,233 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 12:17:24,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:24,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash 966149122, now seen corresponding path program 1 times [2023-04-01 12:17:24,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:24,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041990654] [2023-04-01 12:17:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-01 12:17:25,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041990654] [2023-04-01 12:17:25,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041990654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688219421] [2023-04-01 12:17:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:25,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:25,113 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 12:17:25,115 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 12:17:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:25,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 12:17:25,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 143 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:25,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:17:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-01 12:17:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688219421] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:26,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 12:17:26,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-01 12:17:26,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213066456] [2023-04-01 12:17:26,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:26,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:17:26,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:26,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:17:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:17:26,129 INFO L87 Difference]: Start difference. First operand 7557 states and 10845 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 12:17:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:27,246 INFO L93 Difference]: Finished difference Result 12987 states and 19249 transitions. [2023-04-01 12:17:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:17:27,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 294 [2023-04-01 12:17:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:27,301 INFO L225 Difference]: With dead ends: 12987 [2023-04-01 12:17:27,302 INFO L226 Difference]: Without dead ends: 9195 [2023-04-01 12:17:27,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 593 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:17:27,326 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 751 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:27,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 625 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:17:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2023-04-01 12:17:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 8804. [2023-04-01 12:17:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 5910 states have (on average 1.4710659898477156) internal successors, (8694), 6695 states have internal predecessors, (8694), 1778 states have call successors, (1778), 1110 states have call predecessors, (1778), 1115 states have return successors, (2317), 1615 states have call predecessors, (2317), 1775 states have call successors, (2317) [2023-04-01 12:17:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 12789 transitions. [2023-04-01 12:17:27,971 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 12789 transitions. Word has length 294 [2023-04-01 12:17:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:27,972 INFO L495 AbstractCegarLoop]: Abstraction has 8804 states and 12789 transitions. [2023-04-01 12:17:27,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 12:17:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 12789 transitions. [2023-04-01 12:17:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:27,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:27,999 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:28,010 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 12:17:28,208 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 12:17:28,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:28,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:28,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1132363209, now seen corresponding path program 1 times [2023-04-01 12:17:28,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:28,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555286593] [2023-04-01 12:17:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:28,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 12:17:29,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:29,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555286593] [2023-04-01 12:17:29,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555286593] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:29,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667819113] [2023-04-01 12:17:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:29,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:29,004 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 12:17:29,007 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 12:17:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:29,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:29,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:29,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:29,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667819113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:29,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:29,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 12:17:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207759009] [2023-04-01 12:17:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:29,414 INFO L87 Difference]: Start difference. First operand 8804 states and 12789 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:30,413 INFO L93 Difference]: Finished difference Result 26195 states and 40850 transitions. [2023-04-01 12:17:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2023-04-01 12:17:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:30,594 INFO L225 Difference]: With dead ends: 26195 [2023-04-01 12:17:30,594 INFO L226 Difference]: Without dead ends: 17408 [2023-04-01 12:17:30,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:30,649 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 260 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:30,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 756 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2023-04-01 12:17:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 17317. [2023-04-01 12:17:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17317 states, 11662 states have (on average 1.46372834848225) internal successors, (17070), 13159 states have internal predecessors, (17070), 3483 states have call successors, (3483), 2198 states have call predecessors, (3483), 2171 states have return successors, (5643), 3113 states have call predecessors, (5643), 3480 states have call successors, (5643) [2023-04-01 12:17:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17317 states to 17317 states and 26196 transitions. [2023-04-01 12:17:31,890 INFO L78 Accepts]: Start accepts. Automaton has 17317 states and 26196 transitions. Word has length 294 [2023-04-01 12:17:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:31,891 INFO L495 AbstractCegarLoop]: Abstraction has 17317 states and 26196 transitions. [2023-04-01 12:17:31,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 17317 states and 26196 transitions. [2023-04-01 12:17:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:31,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:31,958 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:31,970 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 12:17:32,167 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 12:17:32,167 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:32,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -340771754, now seen corresponding path program 1 times [2023-04-01 12:17:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:32,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92877197] [2023-04-01 12:17:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:32,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-04-01 12:17:32,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92877197] [2023-04-01 12:17:32,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92877197] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671525977] [2023-04-01 12:17:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:32,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:32,507 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 12:17:32,510 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 12:17:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:32,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 12:17:32,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-04-01 12:17:33,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671525977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:33,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:33,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 12:17:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279265335] [2023-04-01 12:17:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:17:33,023 INFO L87 Difference]: Start difference. First operand 17317 states and 26196 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 12:17:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:33,860 INFO L93 Difference]: Finished difference Result 26019 states and 38969 transitions. [2023-04-01 12:17:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 294 [2023-04-01 12:17:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:33,948 INFO L225 Difference]: With dead ends: 26019 [2023-04-01 12:17:33,948 INFO L226 Difference]: Without dead ends: 17343 [2023-04-01 12:17:33,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 12:17:33,996 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 241 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:33,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 532 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2023-04-01 12:17:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 17316. [2023-04-01 12:17:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17316 states, 11662 states have (on average 1.4568684616703824) internal successors, (16990), 13159 states have internal predecessors, (16990), 3482 states have call successors, (3482), 2198 states have call predecessors, (3482), 2171 states have return successors, (4737), 3111 states have call predecessors, (4737), 3479 states have call successors, (4737) [2023-04-01 12:17:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17316 states to 17316 states and 25209 transitions. [2023-04-01 12:17:35,103 INFO L78 Accepts]: Start accepts. Automaton has 17316 states and 25209 transitions. Word has length 294 [2023-04-01 12:17:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:35,103 INFO L495 AbstractCegarLoop]: Abstraction has 17316 states and 25209 transitions. [2023-04-01 12:17:35,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 12:17:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17316 states and 25209 transitions. [2023-04-01 12:17:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:35,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:35,143 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:35,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 12:17:35,352 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 12:17:35,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:35,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1358278642, now seen corresponding path program 1 times [2023-04-01 12:17:35,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:35,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544599005] [2023-04-01 12:17:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 12:17:36,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544599005] [2023-04-01 12:17:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544599005] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518185330] [2023-04-01 12:17:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:36,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:36,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:36,367 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 12:17:36,382 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 12:17:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:36,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:36,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:36,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518185330] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:36,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:36,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 12:17:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227421030] [2023-04-01 12:17:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:36,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:36,762 INFO L87 Difference]: Start difference. First operand 17316 states and 25209 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:38,682 INFO L93 Difference]: Finished difference Result 51547 states and 81154 transitions. [2023-04-01 12:17:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2023-04-01 12:17:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:38,890 INFO L225 Difference]: With dead ends: 51547 [2023-04-01 12:17:38,890 INFO L226 Difference]: Without dead ends: 34248 [2023-04-01 12:17:39,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:39,068 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 266 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:39,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 757 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34248 states. [2023-04-01 12:17:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34248 to 34069. [2023-04-01 12:17:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34069 states, 23014 states have (on average 1.4491179282176068) internal successors, (33350), 25863 states have internal predecessors, (33350), 6827 states have call successors, (6827), 4358 states have call predecessors, (6827), 4227 states have return successors, (11623), 5993 states have call predecessors, (11623), 6824 states have call successors, (11623) [2023-04-01 12:17:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34069 states to 34069 states and 51800 transitions. [2023-04-01 12:17:41,507 INFO L78 Accepts]: Start accepts. Automaton has 34069 states and 51800 transitions. Word has length 294 [2023-04-01 12:17:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:41,508 INFO L495 AbstractCegarLoop]: Abstraction has 34069 states and 51800 transitions. [2023-04-01 12:17:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:41,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34069 states and 51800 transitions. [2023-04-01 12:17:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:41,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:41,592 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, 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] [2023-04-01 12:17:41,603 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 12:17:41,802 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 12:17:41,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:41,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1118011313, now seen corresponding path program 1 times [2023-04-01 12:17:41,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:41,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035132611] [2023-04-01 12:17:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:41,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-01 12:17:42,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035132611] [2023-04-01 12:17:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035132611] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550626051] [2023-04-01 12:17:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:42,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:42,630 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 12:17:42,633 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 12:17:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:42,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 12:17:42,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 143 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:43,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:17:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-04-01 12:17:43,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550626051] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:43,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 12:17:43,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2023-04-01 12:17:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562738727] [2023-04-01 12:17:43,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:43,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:17:43,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:17:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:17:43,586 INFO L87 Difference]: Start difference. First operand 34069 states and 51800 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 12:17:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:46,526 INFO L93 Difference]: Finished difference Result 59995 states and 94580 transitions. [2023-04-01 12:17:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:17:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 294 [2023-04-01 12:17:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:46,934 INFO L225 Difference]: With dead ends: 59995 [2023-04-01 12:17:46,934 INFO L226 Difference]: Without dead ends: 42919 [2023-04-01 12:17:47,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 593 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:17:47,056 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 543 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:47,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 708 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:17:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42919 states. [2023-04-01 12:17:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42919 to 40820. [2023-04-01 12:17:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40820 states, 27694 states have (on average 1.5095688596807972) internal successors, (41806), 32423 states have internal predecessors, (41806), 8586 states have call successors, (8586), 4358 states have call predecessors, (8586), 4539 states have return successors, (12583), 7383 states have call predecessors, (12583), 8583 states have call successors, (12583) [2023-04-01 12:17:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40820 states to 40820 states and 62975 transitions. [2023-04-01 12:17:49,969 INFO L78 Accepts]: Start accepts. Automaton has 40820 states and 62975 transitions. Word has length 294 [2023-04-01 12:17:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:17:49,970 INFO L495 AbstractCegarLoop]: Abstraction has 40820 states and 62975 transitions. [2023-04-01 12:17:49,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 12:17:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 40820 states and 62975 transitions. [2023-04-01 12:17:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-01 12:17:50,039 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:17:50,039 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:17:50,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 12:17:50,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 12:17:50,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:17:50,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:17:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash 870725279, now seen corresponding path program 1 times [2023-04-01 12:17:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:17:50,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942870738] [2023-04-01 12:17:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:17:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 12:17:51,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:17:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942870738] [2023-04-01 12:17:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942870738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:17:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117334628] [2023-04-01 12:17:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:17:51,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:17:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:17:51,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:17:51,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 12:17:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:17:51,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:17:51,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:17:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 12:17:51,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:17:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117334628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:17:51,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:17:51,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 12:17:51,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390326799] [2023-04-01 12:17:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:17:51,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:17:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:17:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:17:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:51,518 INFO L87 Difference]: Start difference. First operand 40820 states and 62975 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-01 12:17:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:17:56,336 INFO L93 Difference]: Finished difference Result 121643 states and 204566 transitions. [2023-04-01 12:17:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:17:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2023-04-01 12:17:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:17:57,043 INFO L225 Difference]: With dead ends: 121643 [2023-04-01 12:17:57,043 INFO L226 Difference]: Without dead ends: 80840 [2023-04-01 12:17:57,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:17:57,524 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 278 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:17:57,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 731 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:17:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80840 states.