/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:54:48,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:54:48,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:54:48,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:54:48,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:54:48,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:54:48,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:54:48,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:54:48,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:54:48,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:54:48,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:54:48,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:54:48,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:54:48,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:54:48,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:54:48,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:54:48,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:54:48,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:54:48,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:54:48,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:54:48,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:54:48,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:54:48,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:54:48,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:54:48,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:54:48,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:54:48,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:54:48,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:54:48,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:54:48,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:54:48,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:54:48,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:54:48,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:54:48,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:54:48,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:54:48,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:54:48,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:54:48,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:54:48,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:54:48,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:54:48,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:54:48,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:54:48,279 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:54:48,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:54:48,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:54:48,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:54:48,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:54:48,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:54:48,281 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:54:48,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:54:48,281 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:54:48,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:54:48,281 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:54:48,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:54:48,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:54:48,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:54:48,282 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:54:48,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:54:48,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:54:48,282 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:54:48,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:54:48,283 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:54:48,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:54:48,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:54:48,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:54:48,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:54:48,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:54:48,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:54:48,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:54:48,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:54:48,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:54:48,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:54:48,491 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:54:48,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-03 02:54:49,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:54:49,627 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:54:49,628 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-03 02:54:49,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c7065c6f/8b925a90701041b3b9a8f7532dbd27e4/FLAG94da8f6e1 [2023-04-03 02:54:49,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c7065c6f/8b925a90701041b3b9a8f7532dbd27e4 [2023-04-03 02:54:49,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:54:49,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:54:49,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:54:49,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:54:49,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:54:49,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcb4422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49, skipping insertion in model container [2023-04-03 02:54:49,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:54:49,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:54:49,840 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7182,7195] [2023-04-03 02:54:49,852 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9513,9526] [2023-04-03 02:54:49,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:54:49,867 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:54:49,895 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7182,7195] [2023-04-03 02:54:49,901 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9513,9526] [2023-04-03 02:54:49,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:54:49,917 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:54:49,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49 WrapperNode [2023-04-03 02:54:49,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:54:49,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:54:49,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:54:49,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:54:49,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:54:49,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:54:49,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:54:49,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:54:49,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (1/1) ... [2023-04-03 02:54:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:54:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:54:49,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:54:49,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:54:50,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:54:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:54:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:54:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:54:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:54:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:54:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:54:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:54:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:54:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:54:50,085 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:54:50,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:54:50,437 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:54:50,500 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:54:50,500 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:54:50,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:54:50 BoogieIcfgContainer [2023-04-03 02:54:50,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:54:50,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:54:50,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:54:50,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:54:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:54:49" (1/3) ... [2023-04-03 02:54:50,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792852ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:54:50, skipping insertion in model container [2023-04-03 02:54:50,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:49" (2/3) ... [2023-04-03 02:54:50,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792852ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:54:50, skipping insertion in model container [2023-04-03 02:54:50,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:54:50" (3/3) ... [2023-04-03 02:54:50,508 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-03 02:54:50,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:54:50,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-03 02:54:50,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:54:50,572 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;@4f5aab8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:54:50,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-03 02:54:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 81 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:54:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:54:50,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:50,586 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] [2023-04-03 02:54:50,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:50,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash 856572595, now seen corresponding path program 1 times [2023-04-03 02:54:50,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:50,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989521625] [2023-04-03 02:54:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:50,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:50,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989521625] [2023-04-03 02:54:50,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989521625] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:50,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:50,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:54:50,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986681494] [2023-04-03 02:54:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:50,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:54:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:54:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:54:51,038 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 81 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:51,200 INFO L93 Difference]: Finished difference Result 150 states and 234 transitions. [2023-04-03 02:54:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:54:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:54:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:51,208 INFO L225 Difference]: With dead ends: 150 [2023-04-03 02:54:51,209 INFO L226 Difference]: Without dead ends: 81 [2023-04-03 02:54:51,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:54:51,216 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 344 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:51,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 128 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:54:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-03 02:54:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-03 02:54:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-04-03 02:54:51,258 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 45 [2023-04-03 02:54:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:51,259 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-04-03 02:54:51,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-04-03 02:54:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 02:54:51,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:51,261 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] [2023-04-03 02:54:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:54:51,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:51,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:51,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1200459094, now seen corresponding path program 1 times [2023-04-03 02:54:51,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:51,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163257681] [2023-04-03 02:54:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:51,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:51,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163257681] [2023-04-03 02:54:51,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163257681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:51,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:51,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:54:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896670660] [2023-04-03 02:54:51,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:51,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:54:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:54:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:54:51,475 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:51,558 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2023-04-03 02:54:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:54:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-03 02:54:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:51,566 INFO L225 Difference]: With dead ends: 128 [2023-04-03 02:54:51,566 INFO L226 Difference]: Without dead ends: 81 [2023-04-03 02:54:51,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:54:51,568 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:51,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 79 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-03 02:54:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-03 02:54:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-04-03 02:54:51,584 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 46 [2023-04-03 02:54:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:51,585 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-04-03 02:54:51,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-04-03 02:54:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:54:51,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:51,587 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] [2023-04-03 02:54:51,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:54:51,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:51,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 281488132, now seen corresponding path program 1 times [2023-04-03 02:54:51,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:51,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486298463] [2023-04-03 02:54:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:51,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:51,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486298463] [2023-04-03 02:54:51,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486298463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:51,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:51,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:54:51,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717538346] [2023-04-03 02:54:51,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:51,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:54:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:51,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:54:51,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:54:51,701 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:51,773 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2023-04-03 02:54:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:54:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:54:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:51,775 INFO L225 Difference]: With dead ends: 136 [2023-04-03 02:54:51,775 INFO L226 Difference]: Without dead ends: 81 [2023-04-03 02:54:51,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:54:51,780 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 187 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:51,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 94 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-03 02:54:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-03 02:54:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 77 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2023-04-03 02:54:51,793 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 47 [2023-04-03 02:54:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:51,793 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2023-04-03 02:54:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2023-04-03 02:54:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:54:51,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:51,795 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] [2023-04-03 02:54:51,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:54:51,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:51,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1640910520, now seen corresponding path program 1 times [2023-04-03 02:54:51,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:51,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861833682] [2023-04-03 02:54:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:51,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:53,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:53,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861833682] [2023-04-03 02:54:53,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861833682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:53,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:53,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:54:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958387852] [2023-04-03 02:54:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:54:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:54:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:54:53,528 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:54,731 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2023-04-03 02:54:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:54:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 02:54:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:54,736 INFO L225 Difference]: With dead ends: 191 [2023-04-03 02:54:54,736 INFO L226 Difference]: Without dead ends: 162 [2023-04-03 02:54:54,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:54:54,741 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 462 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:54,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 407 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:54:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-04-03 02:54:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2023-04-03 02:54:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.2) internal successors, (120), 101 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-04-03 02:54:54,761 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 48 [2023-04-03 02:54:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:54,762 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-04-03 02:54:54,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-04-03 02:54:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 02:54:54,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:54,768 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] [2023-04-03 02:54:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:54:54,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:54,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -839543389, now seen corresponding path program 1 times [2023-04-03 02:54:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810726800] [2023-04-03 02:54:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:57,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810726800] [2023-04-03 02:54:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810726800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:57,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:57,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:54:57,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204753652] [2023-04-03 02:54:57,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:57,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:54:57,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:54:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:54:57,020 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:00,265 INFO L93 Difference]: Finished difference Result 269 states and 341 transitions. [2023-04-03 02:55:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:55:00,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-03 02:55:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:00,267 INFO L225 Difference]: With dead ends: 269 [2023-04-03 02:55:00,267 INFO L226 Difference]: Without dead ends: 213 [2023-04-03 02:55:00,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:55:00,270 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 458 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:00,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 825 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:55:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-03 02:55:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 129. [2023-04-03 02:55:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.224) internal successors, (153), 125 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2023-04-03 02:55:00,291 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 49 [2023-04-03 02:55:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:00,293 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2023-04-03 02:55:00,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2023-04-03 02:55:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:55:00,295 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:00,295 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] [2023-04-03 02:55:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:55:00,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:00,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1885602009, now seen corresponding path program 1 times [2023-04-03 02:55:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479919342] [2023-04-03 02:55:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:00,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:00,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479919342] [2023-04-03 02:55:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479919342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:00,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:55:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798592470] [2023-04-03 02:55:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:55:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:55:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,392 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:00,423 INFO L93 Difference]: Finished difference Result 259 states and 331 transitions. [2023-04-03 02:55:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:55:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:55:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:00,425 INFO L225 Difference]: With dead ends: 259 [2023-04-03 02:55:00,425 INFO L226 Difference]: Without dead ends: 179 [2023-04-03 02:55:00,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,427 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 37 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:00,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 175 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-04-03 02:55:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2023-04-03 02:55:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.236024844720497) internal successors, (199), 161 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2023-04-03 02:55:00,453 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 62 [2023-04-03 02:55:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:00,454 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2023-04-03 02:55:00,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2023-04-03 02:55:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:55:00,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:00,455 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] [2023-04-03 02:55:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:55:00,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:00,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash -883142558, now seen corresponding path program 1 times [2023-04-03 02:55:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282757057] [2023-04-03 02:55:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:00,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:00,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282757057] [2023-04-03 02:55:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282757057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:00,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:00,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:55:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018410882] [2023-04-03 02:55:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:55:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:55:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,537 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:00,577 INFO L93 Difference]: Finished difference Result 379 states and 485 transitions. [2023-04-03 02:55:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:55:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-03 02:55:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:00,579 INFO L225 Difference]: With dead ends: 379 [2023-04-03 02:55:00,579 INFO L226 Difference]: Without dead ends: 263 [2023-04-03 02:55:00,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,580 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 32 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:00,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 168 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-04-03 02:55:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 245. [2023-04-03 02:55:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 241 states have (on average 1.2614107883817427) internal successors, (304), 241 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 307 transitions. [2023-04-03 02:55:00,622 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 307 transitions. Word has length 65 [2023-04-03 02:55:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:00,623 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 307 transitions. [2023-04-03 02:55:00,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 307 transitions. [2023-04-03 02:55:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:55:00,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:00,623 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] [2023-04-03 02:55:00,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:55:00,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:00,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2041361041, now seen corresponding path program 1 times [2023-04-03 02:55:00,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:00,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631188086] [2023-04-03 02:55:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:00,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631188086] [2023-04-03 02:55:00,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631188086] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:00,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:00,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:55:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144542078] [2023-04-03 02:55:00,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:55:00,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:55:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,701 INFO L87 Difference]: Start difference. First operand 245 states and 307 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:00,765 INFO L93 Difference]: Finished difference Result 631 states and 816 transitions. [2023-04-03 02:55:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:55:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-03 02:55:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:00,767 INFO L225 Difference]: With dead ends: 631 [2023-04-03 02:55:00,767 INFO L226 Difference]: Without dead ends: 435 [2023-04-03 02:55:00,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,769 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:00,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 159 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-04-03 02:55:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 409. [2023-04-03 02:55:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.2790123456790123) internal successors, (518), 405 states have internal predecessors, (518), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 521 transitions. [2023-04-03 02:55:00,813 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 521 transitions. Word has length 68 [2023-04-03 02:55:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:00,813 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 521 transitions. [2023-04-03 02:55:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 521 transitions. [2023-04-03 02:55:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:55:00,814 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:00,814 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] [2023-04-03 02:55:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:55:00,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:00,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1428759068, now seen corresponding path program 1 times [2023-04-03 02:55:00,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:00,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700302904] [2023-04-03 02:55:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:00,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:00,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700302904] [2023-04-03 02:55:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700302904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:00,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:00,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:55:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783181276] [2023-04-03 02:55:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:55:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:55:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,857 INFO L87 Difference]: Start difference. First operand 409 states and 521 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:00,924 INFO L93 Difference]: Finished difference Result 855 states and 1110 transitions. [2023-04-03 02:55:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:55:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:55:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:00,926 INFO L225 Difference]: With dead ends: 855 [2023-04-03 02:55:00,926 INFO L226 Difference]: Without dead ends: 495 [2023-04-03 02:55:00,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:00,929 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 56 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:00,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 110 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-04-03 02:55:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2023-04-03 02:55:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 489 states have (on average 1.2862985685071575) internal successors, (629), 489 states have internal predecessors, (629), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 632 transitions. [2023-04-03 02:55:01,002 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 632 transitions. Word has length 73 [2023-04-03 02:55:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:01,002 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 632 transitions. [2023-04-03 02:55:01,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 632 transitions. [2023-04-03 02:55:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:55:01,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:01,005 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] [2023-04-03 02:55:01,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:55:01,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:01,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1776177949, now seen corresponding path program 1 times [2023-04-03 02:55:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:01,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600482037] [2023-04-03 02:55:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:01,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600482037] [2023-04-03 02:55:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600482037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:01,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:55:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137060177] [2023-04-03 02:55:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:55:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:55:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:55:01,175 INFO L87 Difference]: Start difference. First operand 493 states and 632 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:01,332 INFO L93 Difference]: Finished difference Result 746 states and 943 transitions. [2023-04-03 02:55:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:55:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:55:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:01,335 INFO L225 Difference]: With dead ends: 746 [2023-04-03 02:55:01,336 INFO L226 Difference]: Without dead ends: 744 [2023-04-03 02:55:01,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:55:01,336 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 111 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:01,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 429 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-04-03 02:55:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 517. [2023-04-03 02:55:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 513 states have (on average 1.2573099415204678) internal successors, (645), 513 states have internal predecessors, (645), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 648 transitions. [2023-04-03 02:55:01,433 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 648 transitions. Word has length 74 [2023-04-03 02:55:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:01,434 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 648 transitions. [2023-04-03 02:55:01,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 648 transitions. [2023-04-03 02:55:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:55:01,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:01,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:55:01,436 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:01,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 214311665, now seen corresponding path program 1 times [2023-04-03 02:55:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352740004] [2023-04-03 02:55:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-03 02:55:01,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352740004] [2023-04-03 02:55:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352740004] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:01,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:01,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:55:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240940025] [2023-04-03 02:55:01,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:55:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:55:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:55:01,755 INFO L87 Difference]: Start difference. First operand 517 states and 648 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:01,890 INFO L93 Difference]: Finished difference Result 985 states and 1247 transitions. [2023-04-03 02:55:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:55:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:55:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:01,893 INFO L225 Difference]: With dead ends: 985 [2023-04-03 02:55:01,893 INFO L226 Difference]: Without dead ends: 517 [2023-04-03 02:55:01,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:55:01,895 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:01,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 116 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:55:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-04-03 02:55:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2023-04-03 02:55:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 513 states have (on average 1.226120857699805) internal successors, (629), 513 states have internal predecessors, (629), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 632 transitions. [2023-04-03 02:55:01,985 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 632 transitions. Word has length 86 [2023-04-03 02:55:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:01,986 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 632 transitions. [2023-04-03 02:55:01,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 632 transitions. [2023-04-03 02:55:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:55:01,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:01,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:01,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:55:01,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:01,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2035961238, now seen corresponding path program 1 times [2023-04-03 02:55:01,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:01,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056258624] [2023-04-03 02:55:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:08,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056258624] [2023-04-03 02:55:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056258624] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:55:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053133594] [2023-04-03 02:55:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:55:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:55:08,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:55:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:55:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:08,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 79 conjunts are in the unsatisfiable core [2023-04-03 02:55:08,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:55:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:18,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:57:15,184 WARN L223 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 511 DAG size of output: 476 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)