/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:03:06,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:03:06,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:03:06,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:03:06,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:03:06,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:03:06,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:03:06,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:03:06,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:03:06,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:03:06,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:03:06,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:03:06,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:03:06,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:03:06,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:03:06,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:03:06,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:03:06,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:03:07,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:03:07,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:03:07,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:03:07,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:03:07,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:03:07,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:03:07,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:03:07,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:03:07,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:03:07,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:03:07,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:03:07,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:03:07,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:03:07,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:03:07,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:03:07,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:03:07,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:03:07,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:03:07,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:03:07,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:03:07,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:03:07,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:03:07,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:03:07,020 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 [2023-03-31 22:03:07,044 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:03:07,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:03:07,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:03:07,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:03:07,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:03:07,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:03:07,045 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:03:07,045 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:03:07,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:03:07,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:03:07,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:03:07,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:03:07,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:03:07,048 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:03:07,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:03:07,048 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:03:07,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:03:07,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:07,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:03:07,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:03:07,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:03:07,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:03:07,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:03:07,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:03:07,246 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:03:07,246 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:03:07,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label19.c [2023-03-31 22:03:08,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:03:08,572 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:03:08,573 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label19.c [2023-03-31 22:03:08,598 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ce4d10c/336cf61383bf4074bf6dcac7f50541d6/FLAG08fddb2bd [2023-03-31 22:03:08,612 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ce4d10c/336cf61383bf4074bf6dcac7f50541d6 [2023-03-31 22:03:08,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:03:08,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:03:08,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:08,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:03:08,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:03:08,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:08,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d315d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08, skipping insertion in model container [2023-03-31 22:03:08,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:08,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:03:08,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:03:08,955 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/Problem13_label19.c[2731,2744] [2023-03-31 22:03:09,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:09,626 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:03:09,643 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/Problem13_label19.c[2731,2744] [2023-03-31 22:03:09,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:09,987 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:03:09,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09 WrapperNode [2023-03-31 22:03:09,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:09,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:03:09,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:03:09,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:03:09,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:09,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:03:10,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:03:10,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:03:10,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:03:10,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (1/1) ... [2023-03-31 22:03:10,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:10,358 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) [2023-03-31 22:03:10,393 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 [2023-03-31 22:03:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:03:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:03:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:03:10,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:03:10,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:03:10,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:03:10,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:03:10,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:03:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:03:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:03:10,493 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:03:10,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:03:14,261 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:03:16,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:03:16,442 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:03:16,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:16 BoogieIcfgContainer [2023-03-31 22:03:16,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:03:16,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:03:16,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:03:16,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:03:16,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:03:08" (1/3) ... [2023-03-31 22:03:16,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b4b656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:16, skipping insertion in model container [2023-03-31 22:03:16,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:09" (2/3) ... [2023-03-31 22:03:16,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b4b656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:16, skipping insertion in model container [2023-03-31 22:03:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:16" (3/3) ... [2023-03-31 22:03:16,462 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label19.c [2023-03-31 22:03:16,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:03:16,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:03:16,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:03:16,525 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;@c98bfc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:03:16,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:03:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:03:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:03:16,535 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:16,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:16,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:16,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -134423787, now seen corresponding path program 1 times [2023-03-31 22:03:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415432277] [2023-03-31 22:03:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:16,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:16,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415432277] [2023-03-31 22:03:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415432277] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:16,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712770653] [2023-03-31 22:03:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:16,817 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-03-31 22:03:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:19,966 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:03:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:19,990 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 [2023-03-31 22:03:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:20,015 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:03:20,016 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:03:20,025 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 [2023-03-31 22:03:20,028 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 715 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:20,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 104 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:03:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:03:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2023-03-31 22:03:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1342 states have (on average 1.9418777943368106) internal successors, (2606), 1342 states have internal predecessors, (2606), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:03:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2629 transitions. [2023-03-31 22:03:20,115 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2629 transitions. Word has length 11 [2023-03-31 22:03:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2629 transitions. [2023-03-31 22:03:20,115 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) [2023-03-31 22:03:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2629 transitions. [2023-03-31 22:03:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:03:20,116 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:20,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:03:20,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:20,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -625385714, now seen corresponding path program 1 times [2023-03-31 22:03:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027023407] [2023-03-31 22:03:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:20,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:20,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027023407] [2023-03-31 22:03:20,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027023407] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:20,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:20,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873651921] [2023-03-31 22:03:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:20,355 INFO L87 Difference]: Start difference. First operand 1360 states and 2629 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) [2023-03-31 22:03:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:23,989 INFO L93 Difference]: Finished difference Result 4145 states and 8028 transitions. [2023-03-31 22:03:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:23,989 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 [2023-03-31 22:03:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:24,001 INFO L225 Difference]: With dead ends: 4145 [2023-03-31 22:03:24,001 INFO L226 Difference]: Without dead ends: 2790 [2023-03-31 22:03:24,004 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 [2023-03-31 22:03:24,005 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2457 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:24,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 109 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 22:03:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-03-31 22:03:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2730. [2023-03-31 22:03:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2687 states have (on average 1.6278377372534425) internal successors, (4374), 2692 states have internal predecessors, (4374), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-03-31 22:03:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 4464 transitions. [2023-03-31 22:03:24,068 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 4464 transitions. Word has length 21 [2023-03-31 22:03:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:24,068 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 4464 transitions. [2023-03-31 22:03:24,068 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) [2023-03-31 22:03:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 4464 transitions. [2023-03-31 22:03:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:03:24,069 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:24,069 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] [2023-03-31 22:03:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:03:24,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:24,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1958281022, now seen corresponding path program 1 times [2023-03-31 22:03:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:24,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40876591] [2023-03-31 22:03:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:24,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40876591] [2023-03-31 22:03:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40876591] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:24,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:24,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:24,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713127319] [2023-03-31 22:03:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:24,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:24,264 INFO L87 Difference]: Start difference. First operand 2730 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-03-31 22:03:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:28,781 INFO L93 Difference]: Finished difference Result 8478 states and 14185 transitions. [2023-03-31 22:03:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-03-31 22:03:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:28,824 INFO L225 Difference]: With dead ends: 8478 [2023-03-31 22:03:28,825 INFO L226 Difference]: Without dead ends: 5753 [2023-03-31 22:03:28,832 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 [2023-03-31 22:03:28,836 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2187 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 1049 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:28,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 124 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1049 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 22:03:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2023-03-31 22:03:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5609. [2023-03-31 22:03:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5463 states have (on average 1.4363902617609372) internal successors, (7847), 5498 states have internal predecessors, (7847), 27 states have call successors, (27), 27 states have call predecessors, (27), 118 states have return successors, (459), 83 states have call predecessors, (459), 26 states have call successors, (459) [2023-03-31 22:03:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8333 transitions. [2023-03-31 22:03:28,973 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8333 transitions. Word has length 27 [2023-03-31 22:03:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:28,973 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8333 transitions. [2023-03-31 22:03:28,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-03-31 22:03:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8333 transitions. [2023-03-31 22:03:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:03:28,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:28,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:03:28,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:28,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash 779986027, now seen corresponding path program 1 times [2023-03-31 22:03:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681268526] [2023-03-31 22:03:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:03:29,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681268526] [2023-03-31 22:03:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681268526] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:29,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181392393] [2023-03-31 22:03:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:29,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:29,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:29,303 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) [2023-03-31 22:03:29,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:03:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:29,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:29,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:03:29,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181392393] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:29,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:29,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:03:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924762449] [2023-03-31 22:03:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:03:29,480 INFO L87 Difference]: Start difference. First operand 5609 states and 8333 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:03:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:32,935 INFO L93 Difference]: Finished difference Result 17105 states and 26427 transitions. [2023-03-31 22:03:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-03-31 22:03:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:32,976 INFO L225 Difference]: With dead ends: 17105 [2023-03-31 22:03:32,976 INFO L226 Difference]: Without dead ends: 11501 [2023-03-31 22:03:32,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:32,993 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2098 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4111 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:32,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 95 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4111 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:03:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2023-03-31 22:03:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11238. [2023-03-31 22:03:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 10909 states have (on average 1.2722522687689064) internal successors, (13879), 10998 states have internal predecessors, (13879), 51 states have call successors, (51), 51 states have call predecessors, (51), 277 states have return successors, (1463), 188 states have call predecessors, (1463), 50 states have call successors, (1463) [2023-03-31 22:03:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 15393 transitions. [2023-03-31 22:03:33,368 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 15393 transitions. Word has length 45 [2023-03-31 22:03:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:33,368 INFO L495 AbstractCegarLoop]: Abstraction has 11238 states and 15393 transitions. [2023-03-31 22:03:33,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:03:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 15393 transitions. [2023-03-31 22:03:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 22:03:33,375 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:33,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:33,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:33,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:33,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:33,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -509230058, now seen corresponding path program 1 times [2023-03-31 22:03:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878267467] [2023-03-31 22:03:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:33,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:33,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878267467] [2023-03-31 22:03:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878267467] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638879764] [2023-03-31 22:03:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:33,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:33,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:33,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:03:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:33,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:03:33,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:34,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638879764] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:34,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:34,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-03-31 22:03:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773307747] [2023-03-31 22:03:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:34,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:34,090 INFO L87 Difference]: Start difference. First operand 11238 states and 15393 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-03-31 22:03:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:37,578 INFO L93 Difference]: Finished difference Result 23691 states and 32491 transitions. [2023-03-31 22:03:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:03:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-03-31 22:03:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:37,618 INFO L225 Difference]: With dead ends: 23691 [2023-03-31 22:03:37,618 INFO L226 Difference]: Without dead ends: 12458 [2023-03-31 22:03:37,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:03:37,634 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1953 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:37,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 116 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:03:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2023-03-31 22:03:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 12164. [2023-03-31 22:03:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12164 states, 11724 states have (on average 1.2540941658137155) internal successors, (14703), 11860 states have internal predecessors, (14703), 54 states have call successors, (54), 54 states have call predecessors, (54), 385 states have return successors, (1737), 249 states have call predecessors, (1737), 53 states have call successors, (1737) [2023-03-31 22:03:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12164 states to 12164 states and 16494 transitions. [2023-03-31 22:03:37,837 INFO L78 Accepts]: Start accepts. Automaton has 12164 states and 16494 transitions. Word has length 70 [2023-03-31 22:03:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 12164 states and 16494 transitions. [2023-03-31 22:03:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-03-31 22:03:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 12164 states and 16494 transitions. [2023-03-31 22:03:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:03:37,841 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:37,842 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:03:37,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:38,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:38,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1875044620, now seen corresponding path program 1 times [2023-03-31 22:03:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:38,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567390690] [2023-03-31 22:03:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:03:38,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567390690] [2023-03-31 22:03:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567390690] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:38,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896836350] [2023-03-31 22:03:38,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:38,207 INFO L87 Difference]: Start difference. First operand 12164 states and 16494 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-03-31 22:03:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:41,219 INFO L93 Difference]: Finished difference Result 29251 states and 42530 transitions. [2023-03-31 22:03:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 79 [2023-03-31 22:03:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:41,260 INFO L225 Difference]: With dead ends: 29251 [2023-03-31 22:03:41,261 INFO L226 Difference]: Without dead ends: 17741 [2023-03-31 22:03:41,278 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 [2023-03-31 22:03:41,279 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:41,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1281 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:03:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17741 states. [2023-03-31 22:03:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17741 to 17151. [2023-03-31 22:03:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17151 states, 16578 states have (on average 1.2170949451079744) internal successors, (20177), 16754 states have internal predecessors, (20177), 77 states have call successors, (77), 77 states have call predecessors, (77), 495 states have return successors, (3050), 319 states have call predecessors, (3050), 76 states have call successors, (3050) [2023-03-31 22:03:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17151 states to 17151 states and 23304 transitions. [2023-03-31 22:03:41,529 INFO L78 Accepts]: Start accepts. Automaton has 17151 states and 23304 transitions. Word has length 79 [2023-03-31 22:03:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:41,531 INFO L495 AbstractCegarLoop]: Abstraction has 17151 states and 23304 transitions. [2023-03-31 22:03:41,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-03-31 22:03:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 17151 states and 23304 transitions. [2023-03-31 22:03:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 22:03:41,534 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:41,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:41,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:03:41,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:41,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash 511485999, now seen corresponding path program 1 times [2023-03-31 22:03:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398606892] [2023-03-31 22:03:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:41,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:41,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:41,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398606892] [2023-03-31 22:03:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398606892] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:41,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:41,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278551981] [2023-03-31 22:03:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:41,661 INFO L87 Difference]: Start difference. First operand 17151 states and 23304 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-03-31 22:03:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:44,886 INFO L93 Difference]: Finished difference Result 48764 states and 69439 transitions. [2023-03-31 22:03:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 81 [2023-03-31 22:03:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:44,981 INFO L225 Difference]: With dead ends: 48764 [2023-03-31 22:03:44,981 INFO L226 Difference]: Without dead ends: 32267 [2023-03-31 22:03:45,024 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 [2023-03-31 22:03:45,025 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:45,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1281 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:03:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32267 states. [2023-03-31 22:03:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32267 to 29430. [2023-03-31 22:03:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29430 states, 28610 states have (on average 1.1813002446696959) internal successors, (33797), 28851 states have internal predecessors, (33797), 133 states have call successors, (133), 133 states have call predecessors, (133), 686 states have return successors, (6020), 445 states have call predecessors, (6020), 132 states have call successors, (6020) [2023-03-31 22:03:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29430 states to 29430 states and 39950 transitions. [2023-03-31 22:03:45,527 INFO L78 Accepts]: Start accepts. Automaton has 29430 states and 39950 transitions. Word has length 81 [2023-03-31 22:03:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:45,529 INFO L495 AbstractCegarLoop]: Abstraction has 29430 states and 39950 transitions. [2023-03-31 22:03:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-03-31 22:03:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29430 states and 39950 transitions. [2023-03-31 22:03:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 22:03:45,531 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:45,532 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2023-03-31 22:03:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:03:45,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:45,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -451151275, now seen corresponding path program 1 times [2023-03-31 22:03:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523981002] [2023-03-31 22:03:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:03:45,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523981002] [2023-03-31 22:03:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523981002] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471651584] [2023-03-31 22:03:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:45,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:45,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:45,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:45,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:03:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:45,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:03:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:03:45,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:03:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471651584] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:03:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:03:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616902037] [2023-03-31 22:03:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:46,222 INFO L87 Difference]: Start difference. First operand 29430 states and 39950 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:03:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:49,963 INFO L93 Difference]: Finished difference Result 74296 states and 104241 transitions. [2023-03-31 22:03:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:49,964 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-03-31 22:03:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:50,096 INFO L225 Difference]: With dead ends: 74296 [2023-03-31 22:03:50,097 INFO L226 Difference]: Without dead ends: 45256 [2023-03-31 22:03:50,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:03:50,151 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2411 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2411 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2411 Valid, 83 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:03:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45256 states. [2023-03-31 22:03:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45256 to 43990. [2023-03-31 22:03:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43990 states, 42687 states have (on average 1.1707779886148009) internal successors, (49977), 43096 states have internal predecessors, (49977), 197 states have call successors, (197), 197 states have call predecessors, (197), 1105 states have return successors, (9771), 696 states have call predecessors, (9771), 196 states have call successors, (9771) [2023-03-31 22:03:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43990 states to 43990 states and 59945 transitions. [2023-03-31 22:03:50,752 INFO L78 Accepts]: Start accepts. Automaton has 43990 states and 59945 transitions. Word has length 85 [2023-03-31 22:03:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:50,755 INFO L495 AbstractCegarLoop]: Abstraction has 43990 states and 59945 transitions. [2023-03-31 22:03:50,755 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:03:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 43990 states and 59945 transitions. [2023-03-31 22:03:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-03-31 22:03:50,759 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:50,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:50,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:50,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:50,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:50,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -595168014, now seen corresponding path program 1 times [2023-03-31 22:03:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:50,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142163552] [2023-03-31 22:03:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-31 22:03:51,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142163552] [2023-03-31 22:03:51,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142163552] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:51,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:51,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:51,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141635136] [2023-03-31 22:03:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:51,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:51,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:51,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:51,078 INFO L87 Difference]: Start difference. First operand 43990 states and 59945 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-03-31 22:03:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:54,154 INFO L93 Difference]: Finished difference Result 103755 states and 148140 transitions. [2023-03-31 22:03:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 102 [2023-03-31 22:03:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:54,871 INFO L225 Difference]: With dead ends: 103755 [2023-03-31 22:03:54,871 INFO L226 Difference]: Without dead ends: 60155 [2023-03-31 22:03:54,914 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 [2023-03-31 22:03:54,916 INFO L413 NwaCegarLoop]: 1210 mSDtfsCounter, 679 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:54,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1238 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:03:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60155 states. [2023-03-31 22:03:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60155 to 57986. [2023-03-31 22:03:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57986 states, 56472 states have (on average 1.1474890211078057) internal successors, (64801), 56939 states have internal predecessors, (64801), 262 states have call successors, (262), 262 states have call predecessors, (262), 1251 states have return successors, (12693), 784 states have call predecessors, (12693), 261 states have call successors, (12693) [2023-03-31 22:03:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57986 states to 57986 states and 77756 transitions. [2023-03-31 22:03:55,933 INFO L78 Accepts]: Start accepts. Automaton has 57986 states and 77756 transitions. Word has length 102 [2023-03-31 22:03:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:55,933 INFO L495 AbstractCegarLoop]: Abstraction has 57986 states and 77756 transitions. [2023-03-31 22:03:55,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-03-31 22:03:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 57986 states and 77756 transitions. [2023-03-31 22:03:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-31 22:03:55,935 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:55,936 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 22:03:55,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:55,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 598364868, now seen corresponding path program 1 times [2023-03-31 22:03:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:55,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404132995] [2023-03-31 22:03:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:55,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 22:03:56,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:56,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404132995] [2023-03-31 22:03:56,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404132995] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106285661] [2023-03-31 22:03:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:56,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:03:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:56,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:03:56,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 22:03:56,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 22:03:56,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106285661] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:03:56,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556301513] [2023-03-31 22:03:56,549 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-03-31 22:03:56,549 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:03:56,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:03:56,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:03:56,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:03:56,656 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:03:56,757 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-03-31 22:03:56,874 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2023-03-31 22:03:57,142 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8838 conjuctions. This might take some time... [2023-03-31 22:03:57,219 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 36 conjuctions. [2023-03-31 22:03:57,760 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:03:57,811 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:03:57,843 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5335 conjuctions. This might take some time... [2023-03-31 22:03:58,426 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 385 conjuctions.