/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:31:03,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:31:03,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:31:03,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:31:03,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:31:03,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:31:03,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:31:03,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:31:03,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:31:03,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:31:03,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:31:03,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:31:03,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:31:03,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:31:03,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:31:03,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:31:03,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:31:03,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:31:03,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:31:03,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:31:03,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:31:03,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:31:03,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:31:03,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:31:03,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:31:03,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:31:03,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:31:03,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:31:03,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:31:03,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:31:03,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:31:03,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:31:03,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:31:03,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:31:03,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:31:03,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:31:03,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:31:03,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:31:03,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:31:03,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:31:03,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:31:03,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:31:03,503 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:31:03,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:31:03,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:31:03,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:31:03,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:31:03,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:31:03,505 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:31:03,505 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:31:03,505 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:31:03,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:31:03,505 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:31:03,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:31:03,506 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:31:03,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:31:03,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:31:03,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:31:03,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:31:03,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:31:03,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:31:03,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:31:03,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:31:03,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:31:03,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:31:03,740 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:31:03,740 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:31:03,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label33.c [2023-04-01 10:31:04,888 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:31:05,152 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:31:05,152 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label33.c [2023-04-01 10:31:05,171 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a32de6f83/683c84ea75e54659b371892db68a9163/FLAGca546e0e7 [2023-04-01 10:31:05,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a32de6f83/683c84ea75e54659b371892db68a9163 [2023-04-01 10:31:05,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:31:05,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:31:05,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:31:05,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:31:05,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:31:05,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:05,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42815e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05, skipping insertion in model container [2023-04-01 10:31:05,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:05,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:31:05,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:31:05,420 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/eca-rers2012/Problem18_label33.c[2701,2714] [2023-04-01 10:31:05,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:31:05,926 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:31:05,943 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/eca-rers2012/Problem18_label33.c[2701,2714] [2023-04-01 10:31:06,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:31:06,184 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:31:06,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06 WrapperNode [2023-04-01 10:31:06,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:31:06,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:31:06,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:31:06,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:31:06,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:31:06,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:31:06,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:31:06,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:31:06,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (1/1) ... [2023-04-01 10:31:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:31:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:31:06,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:31:06,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:31:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:31:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:31:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:31:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:31:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:31:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:31:06,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:31:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:31:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:31:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:31:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:31:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:31:06,547 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:31:06,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:31:09,146 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:31:15,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:31:15,939 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:31:15,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:15 BoogieIcfgContainer [2023-04-01 10:31:15,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:31:15,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:31:15,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:31:15,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:31:15,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:31:05" (1/3) ... [2023-04-01 10:31:15,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127e2ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:15, skipping insertion in model container [2023-04-01 10:31:15,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:06" (2/3) ... [2023-04-01 10:31:15,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127e2ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:15, skipping insertion in model container [2023-04-01 10:31:15,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:15" (3/3) ... [2023-04-01 10:31:15,949 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label33.c [2023-04-01 10:31:15,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:31:15,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:31:16,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:31:16,025 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;@703a3678, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:31:16,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:31:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:31:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:31:16,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:16,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:16,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:16,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash 510740964, now seen corresponding path program 1 times [2023-04-01 10:31:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:16,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828497420] [2023-04-01 10:31:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:16,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828497420] [2023-04-01 10:31:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828497420] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:16,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202139691] [2023-04-01 10:31:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:16,421 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:31:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:18,397 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:31:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:31:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:18,411 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:31:18,412 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:31:18,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:18,418 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:18,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:31:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:31:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:31:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 10:31:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 10:31:18,474 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 10:31:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 10:31:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:31:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 10:31:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:31:18,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:18,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:18,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:31:18,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:18,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:18,476 INFO L85 PathProgramCache]: Analyzing trace with hash -495490966, now seen corresponding path program 1 times [2023-04-01 10:31:18,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:18,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867658246] [2023-04-01 10:31:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:18,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867658246] [2023-04-01 10:31:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867658246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:18,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:18,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:31:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275111260] [2023-04-01 10:31:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:18,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:31:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:18,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:31:18,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:31:18,606 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:31:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:21,047 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 10:31:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:31:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 10:31:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:21,055 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 10:31:21,055 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 10:31:21,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:31:21,057 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:21,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 10:31:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 10:31:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 10:31:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 10:31:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 10:31:21,097 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 10:31:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:21,097 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 10:31:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:31:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 10:31:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:31:21,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:21,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:31:21,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:21,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1554637278, now seen corresponding path program 1 times [2023-04-01 10:31:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120633204] [2023-04-01 10:31:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:21,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120633204] [2023-04-01 10:31:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120633204] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:21,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:21,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:31:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644154211] [2023-04-01 10:31:21,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:31:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:31:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:31:21,174 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:31:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:23,440 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 10:31:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:31:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 10:31:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:23,456 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 10:31:23,456 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 10:31:23,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:31:23,460 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:31:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 10:31:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 10:31:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 10:31:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 10:31:23,513 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 10:31:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:23,513 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 10:31:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:31:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 10:31:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 10:31:23,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:23,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:23,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:31:23,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:23,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -353231179, now seen corresponding path program 1 times [2023-04-01 10:31:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969976127] [2023-04-01 10:31:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:23,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:23,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969976127] [2023-04-01 10:31:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969976127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:23,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:23,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121682945] [2023-04-01 10:31:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:23,633 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:31:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:25,091 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2023-04-01 10:31:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-01 10:31:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:25,102 INFO L225 Difference]: With dead ends: 6434 [2023-04-01 10:31:25,102 INFO L226 Difference]: Without dead ends: 3232 [2023-04-01 10:31:25,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:25,112 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:25,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 10:31:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-04-01 10:31:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207. [2023-04-01 10:31:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132) [2023-04-01 10:31:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions. [2023-04-01 10:31:25,187 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58 [2023-04-01 10:31:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:25,187 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions. [2023-04-01 10:31:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:31:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions. [2023-04-01 10:31:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 10:31:25,192 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:25,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:25,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:31:25,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:25,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash 28650491, now seen corresponding path program 1 times [2023-04-01 10:31:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:25,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513578068] [2023-04-01 10:31:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:31:25,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513578068] [2023-04-01 10:31:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513578068] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:25,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:25,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:25,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797237699] [2023-04-01 10:31:25,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:25,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:25,358 INFO L87 Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:31:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:27,019 INFO L93 Difference]: Finished difference Result 9127 states and 12555 transitions. [2023-04-01 10:31:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-04-01 10:31:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:27,136 INFO L225 Difference]: With dead ends: 9127 [2023-04-01 10:31:27,137 INFO L226 Difference]: Without dead ends: 5925 [2023-04-01 10:31:27,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:27,147 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:27,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 905 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:31:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-04-01 10:31:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5866. [2023-04-01 10:31:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5778 states have (on average 1.248355832467982) internal successors, (7213), 5797 states have internal predecessors, (7213), 29 states have call successors, (29), 29 states have call predecessors, (29), 58 states have return successors, (303), 39 states have call predecessors, (303), 28 states have call successors, (303) [2023-04-01 10:31:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7545 transitions. [2023-04-01 10:31:27,237 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7545 transitions. Word has length 68 [2023-04-01 10:31:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:27,238 INFO L495 AbstractCegarLoop]: Abstraction has 5866 states and 7545 transitions. [2023-04-01 10:31:27,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:31:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7545 transitions. [2023-04-01 10:31:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:31:27,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:27,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:27,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:31:27,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:27,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1317721496, now seen corresponding path program 1 times [2023-04-01 10:31:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239949119] [2023-04-01 10:31:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:27,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239949119] [2023-04-01 10:31:27,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239949119] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:31:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007877845] [2023-04-01 10:31:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:31:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:31:27,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:31:27,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:31:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:27,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:31:27,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:31:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:27,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:31:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:27,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007877845] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:31:27,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932700176] [2023-04-01 10:31:27,742 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 10:31:27,742 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:31:27,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:31:27,748 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:31:27,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:31:27,941 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:31:28,099 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-01 10:31:30,622 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44