/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:03:28,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:03:28,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:03:28,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:03:28,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:03:28,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:03:28,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:03:28,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:03:28,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:03:28,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:03:28,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:03:28,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:03:28,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:03:28,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:03:28,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:03:28,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:03:28,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:03:28,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:03:28,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:03:28,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:03:28,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:03:28,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:03:28,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:03:28,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:03:28,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:03:28,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:03:28,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:03:28,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:03:28,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:03:28,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:03:28,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:03:28,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:03:28,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:03:28,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:03:28,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:03:28,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:03:28,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:03:28,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:03:28,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:03:28,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:03:28,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:03:28,603 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 22:03:28,617 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:03:28,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:03:28,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:03:28,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:03:28,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:03:28,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:03:28,618 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:03:28,618 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:03:28,618 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:03:28,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:03:28,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:03:28,620 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:03:28,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:03:28,620 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:03:28,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:03:28,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:03:28,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:03:28,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:03:28,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:28,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:03:28,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:03:28,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:03:28,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:03:28,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:03:28,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:03:28,801 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:03:28,801 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:03:28,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label24.c [2023-03-31 22:03:29,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:03:30,191 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:03:30,192 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label24.c [2023-03-31 22:03:30,217 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0035cab9c/fe71c9b7c61249ddbfd94e7ee00de31e/FLAG685a55680 [2023-03-31 22:03:30,228 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0035cab9c/fe71c9b7c61249ddbfd94e7ee00de31e [2023-03-31 22:03:30,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:03:30,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:03:30,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:30,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:03:30,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:03:30,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:30" (1/1) ... [2023-03-31 22:03:30,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab008fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:30, skipping insertion in model container [2023-03-31 22:03:30,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:30" (1/1) ... [2023-03-31 22:03:30,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:03:30,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:03:30,514 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_label24.c[4341,4354] [2023-03-31 22:03:31,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:31,199 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:03:31,216 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_label24.c[4341,4354] [2023-03-31 22:03:31,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:31,590 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:03:31,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31 WrapperNode [2023-03-31 22:03:31,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:31,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:03:31,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:03:31,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:03:31,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:03:31,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:03:31,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:03:31,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:03:31,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (1/1) ... [2023-03-31 22:03:31,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:31,893 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 22:03:31,895 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 22:03:31,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:03:31,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:03:31,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:03:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:03:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:03:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:03:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:03:31,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:03:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:03:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:03:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:03:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:03:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:03:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:03:32,024 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:03:32,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:03:35,793 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:03:37,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:03:37,918 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:03:37,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:37 BoogieIcfgContainer [2023-03-31 22:03:37,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:03:37,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:03:37,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:03:37,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:03:37,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:03:30" (1/3) ... [2023-03-31 22:03:37,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48322437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:37, skipping insertion in model container [2023-03-31 22:03:37,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:31" (2/3) ... [2023-03-31 22:03:37,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48322437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:37, skipping insertion in model container [2023-03-31 22:03:37,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:37" (3/3) ... [2023-03-31 22:03:37,928 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label24.c [2023-03-31 22:03:37,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:03:37,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:03:37,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:03:37,992 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;@637d2873, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:03:37,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:03:37,998 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 22:03:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:03:38,002 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:38,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:38,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:38,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash -134420715, now seen corresponding path program 1 times [2023-03-31 22:03:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:38,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69738658] [2023-03-31 22:03:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:38,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:38,206 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 22:03:38,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69738658] [2023-03-31 22:03:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69738658] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140330702] [2023-03-31 22:03:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:38,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:38,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:38,228 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 22:03:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:41,223 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:03:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:41,226 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 22:03:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:41,243 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:03:41,243 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:03:41,247 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 22:03:41,249 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 757 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:41,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 138 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:03:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:03:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1366. [2023-03-31 22:03:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1348 states have (on average 1.9117210682492582) internal successors, (2577), 1348 states have internal predecessors, (2577), 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 22:03:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2600 transitions. [2023-03-31 22:03:41,357 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2600 transitions. Word has length 11 [2023-03-31 22:03:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:41,357 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 2600 transitions. [2023-03-31 22:03:41,358 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 22:03:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2600 transitions. [2023-03-31 22:03:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:03:41,359 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:41,359 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] [2023-03-31 22:03:41,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:03:41,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:41,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 637320134, now seen corresponding path program 1 times [2023-03-31 22:03:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:41,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252346430] [2023-03-31 22:03:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:41,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:41,491 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 22:03:41,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:41,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252346430] [2023-03-31 22:03:41,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252346430] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:41,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:41,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725075167] [2023-03-31 22:03:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:41,494 INFO L87 Difference]: Start difference. First operand 1366 states and 2600 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 22:03:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:45,251 INFO L93 Difference]: Finished difference Result 4163 states and 7942 transitions. [2023-03-31 22:03:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:45,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-03-31 22:03:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:45,278 INFO L225 Difference]: With dead ends: 4163 [2023-03-31 22:03:45,279 INFO L226 Difference]: Without dead ends: 2802 [2023-03-31 22:03:45,288 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 22:03:45,290 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2447 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2447 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, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:45,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2447 Valid, 109 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 22:03:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2023-03-31 22:03:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2737. [2023-03-31 22:03:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2695 states have (on average 1.6107606679035251) internal successors, (4341), 2699 states have internal predecessors, (4341), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 22:03:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 4430 transitions. [2023-03-31 22:03:45,450 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 4430 transitions. Word has length 26 [2023-03-31 22:03:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:45,451 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 4430 transitions. [2023-03-31 22:03:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 22:03:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 4430 transitions. [2023-03-31 22:03:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:03:45,452 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:45,452 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 22:03:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:03:45,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:45,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1107023970, now seen corresponding path program 1 times [2023-03-31 22:03:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455903212] [2023-03-31 22:03:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:45,753 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 22:03:45,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455903212] [2023-03-31 22:03:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455903212] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898523342] [2023-03-31 22:03:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:45,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:45,756 INFO L87 Difference]: Start difference. First operand 2737 states and 4430 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 22:03:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:49,964 INFO L93 Difference]: Finished difference Result 8470 states and 14023 transitions. [2023-03-31 22:03:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:49,964 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 22:03:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:49,988 INFO L225 Difference]: With dead ends: 8470 [2023-03-31 22:03:49,989 INFO L226 Difference]: Without dead ends: 5738 [2023-03-31 22:03:49,994 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 22:03:49,994 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2175 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4715 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 4715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:49,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 123 Invalid, 5762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 4715 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:03:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2023-03-31 22:03:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5588. [2023-03-31 22:03:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5458 states have (on average 1.4235983876877978) internal successors, (7770), 5488 states have internal predecessors, (7770), 27 states have call successors, (27), 27 states have call predecessors, (27), 102 states have return successors, (411), 72 states have call predecessors, (411), 26 states have call successors, (411) [2023-03-31 22:03:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 8208 transitions. [2023-03-31 22:03:50,100 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 8208 transitions. Word has length 27 [2023-03-31 22:03:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:50,100 INFO L495 AbstractCegarLoop]: Abstraction has 5588 states and 8208 transitions. [2023-03-31 22:03:50,100 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 22:03:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 8208 transitions. [2023-03-31 22:03:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:03:50,102 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:50,102 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 22:03:50,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:03:50,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:50,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2095554475, now seen corresponding path program 1 times [2023-03-31 22:03:50,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:50,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559622777] [2023-03-31 22:03:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:50,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:50,304 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 22:03:50,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:50,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559622777] [2023-03-31 22:03:50,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559622777] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:50,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427172786] [2023-03-31 22:03:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:50,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:50,308 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 22:03:50,311 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 22:03:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:50,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:50,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:50,466 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 22:03:50,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:50,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427172786] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:50,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:50,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:03:50,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643305745] [2023-03-31 22:03:50,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:50,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:50,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:03:50,468 INFO L87 Difference]: Start difference. First operand 5588 states and 8208 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 22:03:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:53,838 INFO L93 Difference]: Finished difference Result 14154 states and 21150 transitions. [2023-03-31 22:03:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:53,839 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 22:03:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:53,865 INFO L225 Difference]: With dead ends: 14154 [2023-03-31 22:03:53,865 INFO L226 Difference]: Without dead ends: 8571 [2023-03-31 22:03:53,878 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 22:03:53,881 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2097 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:53,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 96 Invalid, 5157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 22:03:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8571 states. [2023-03-31 22:03:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8571 to 8440. [2023-03-31 22:03:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8440 states, 8193 states have (on average 1.3183205175149517) internal successors, (10801), 8256 states have internal predecessors, (10801), 39 states have call successors, (39), 39 states have call predecessors, (39), 207 states have return successors, (990), 144 states have call predecessors, (990), 38 states have call successors, (990) [2023-03-31 22:03:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8440 states to 8440 states and 11830 transitions. [2023-03-31 22:03:54,048 INFO L78 Accepts]: Start accepts. Automaton has 8440 states and 11830 transitions. Word has length 45 [2023-03-31 22:03:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:54,049 INFO L495 AbstractCegarLoop]: Abstraction has 8440 states and 11830 transitions. [2023-03-31 22:03:54,049 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 22:03:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8440 states and 11830 transitions. [2023-03-31 22:03:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 22:03:54,054 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:54,055 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] [2023-03-31 22:03:54,073 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 22:03:54,260 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 22:03:54,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:54,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 626041344, now seen corresponding path program 1 times [2023-03-31 22:03:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849051999] [2023-03-31 22:03:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:03:54,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849051999] [2023-03-31 22:03:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849051999] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872010491] [2023-03-31 22:03:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:54,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:54,501 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 22:03:54,560 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 22:03:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:54,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 22:03:54,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:54,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:54,879 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 22:03:54,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872010491] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:54,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:03:54,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2023-03-31 22:03:54,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354941535] [2023-03-31 22:03:54,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:03:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:03:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-31 22:03:54,880 INFO L87 Difference]: Start difference. First operand 8440 states and 11830 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 22:04:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:00,628 INFO L93 Difference]: Finished difference Result 33490 states and 50719 transitions. [2023-03-31 22:04:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:04:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 52 [2023-03-31 22:04:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:00,771 INFO L225 Difference]: With dead ends: 33490 [2023-03-31 22:04:00,771 INFO L226 Difference]: Without dead ends: 25055 [2023-03-31 22:04:00,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:04:00,835 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2738 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 6991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2738 Valid, 108 Invalid, 6991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1516 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-03-31 22:04:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25055 states. [2023-03-31 22:04:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25055 to 24484. [2023-03-31 22:04:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24484 states, 23855 states have (on average 1.295745126807797) internal successors, (30910), 24020 states have internal predecessors, (30910), 110 states have call successors, (110), 110 states have call predecessors, (110), 518 states have return successors, (5831), 353 states have call predecessors, (5831), 109 states have call successors, (5831) [2023-03-31 22:04:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24484 states to 24484 states and 36851 transitions. [2023-03-31 22:04:01,338 INFO L78 Accepts]: Start accepts. Automaton has 24484 states and 36851 transitions. Word has length 52 [2023-03-31 22:04:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 24484 states and 36851 transitions. [2023-03-31 22:04:01,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 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 22:04:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24484 states and 36851 transitions. [2023-03-31 22:04:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 22:04:01,342 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:01,342 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 22:04:01,365 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 22:04:01,546 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 22:04:01,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:01,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash -253383399, now seen corresponding path program 1 times [2023-03-31 22:04:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:01,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759705476] [2023-03-31 22:04:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:01,830 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 22:04:01,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:01,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759705476] [2023-03-31 22:04:01,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759705476] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:01,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:01,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:01,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219325164] [2023-03-31 22:04:01,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:01,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:01,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:01,832 INFO L87 Difference]: Start difference. First operand 24484 states and 36851 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 22:04:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:06,299 INFO L93 Difference]: Finished difference Result 57147 states and 85452 transitions. [2023-03-31 22:04:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:04:06,301 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 22:04:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:06,386 INFO L225 Difference]: With dead ends: 57147 [2023-03-31 22:04:06,387 INFO L226 Difference]: Without dead ends: 32668 [2023-03-31 22:04:06,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:04:06,431 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2077 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:06,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 100 Invalid, 5068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:04:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32668 states. [2023-03-31 22:04:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32668 to 32065. [2023-03-31 22:04:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 31244 states have (on average 1.2469914223530918) internal successors, (38961), 31478 states have internal predecessors, (38961), 145 states have call successors, (145), 145 states have call predecessors, (145), 675 states have return successors, (7529), 441 states have call predecessors, (7529), 144 states have call successors, (7529) [2023-03-31 22:04:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 46635 transitions. [2023-03-31 22:04:07,136 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 46635 transitions. Word has length 70 [2023-03-31 22:04:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:07,137 INFO L495 AbstractCegarLoop]: Abstraction has 32065 states and 46635 transitions. [2023-03-31 22:04:07,137 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 22:04:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 46635 transitions. [2023-03-31 22:04:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:04:07,138 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:07,138 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 22:04:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:04:07,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:07,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash 852184532, now seen corresponding path program 1 times [2023-03-31 22:04:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:07,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082970900] [2023-03-31 22:04:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:07,290 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 22:04:07,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:07,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082970900] [2023-03-31 22:04:07,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082970900] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:07,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:07,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793332190] [2023-03-31 22:04:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:07,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:07,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:07,292 INFO L87 Difference]: Start difference. First operand 32065 states and 46635 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 22:04:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:10,606 INFO L93 Difference]: Finished difference Result 87256 states and 134415 transitions. [2023-03-31 22:04:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:10,607 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 22:04:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:10,761 INFO L225 Difference]: With dead ends: 87256 [2023-03-31 22:04:10,761 INFO L226 Difference]: Without dead ends: 55778 [2023-03-31 22:04:10,910 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 22:04:10,910 INFO L413 NwaCegarLoop]: 1248 mSDtfsCounter, 675 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:10,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1276 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:04:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55778 states. [2023-03-31 22:04:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55778 to 49483. [2023-03-31 22:04:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49483 states, 48402 states have (on average 1.2219329779761168) internal successors, (59144), 48697 states have internal predecessors, (59144), 226 states have call successors, (226), 226 states have call predecessors, (226), 854 states have return successors, (13825), 559 states have call predecessors, (13825), 225 states have call successors, (13825) [2023-03-31 22:04:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49483 states to 49483 states and 73195 transitions. [2023-03-31 22:04:11,831 INFO L78 Accepts]: Start accepts. Automaton has 49483 states and 73195 transitions. Word has length 79 [2023-03-31 22:04:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:11,831 INFO L495 AbstractCegarLoop]: Abstraction has 49483 states and 73195 transitions. [2023-03-31 22:04:11,831 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 22:04:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 49483 states and 73195 transitions. [2023-03-31 22:04:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 22:04:11,832 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:11,832 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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 22:04:11,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:04:11,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:11,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash -93364737, now seen corresponding path program 1 times [2023-03-31 22:04:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765860934] [2023-03-31 22:04:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:04:11,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765860934] [2023-03-31 22:04:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765860934] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142020684] [2023-03-31 22:04:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:11,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:12,005 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 22:04:12,009 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 22:04:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:12,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:04:12,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-31 22:04:12,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:04:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142020684] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:12,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:04:12,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:04:12,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312707577] [2023-03-31 22:04:12,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:12,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:12,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:12,327 INFO L87 Difference]: Start difference. First operand 49483 states and 73195 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 22:04:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:15,369 INFO L93 Difference]: Finished difference Result 100023 states and 149502 transitions. [2023-03-31 22:04:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 90 [2023-03-31 22:04:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:15,526 INFO L225 Difference]: With dead ends: 100023 [2023-03-31 22:04:15,526 INFO L226 Difference]: Without dead ends: 50930 [2023-03-31 22:04:15,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:15,569 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 855 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:15,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 934 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:04:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50930 states. [2023-03-31 22:04:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50930 to 50516. [2023-03-31 22:04:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50516 states, 49430 states have (on average 1.1918065951851102) internal successors, (58911), 49723 states have internal predecessors, (58911), 231 states have call successors, (231), 231 states have call predecessors, (231), 854 states have return successors, (12241), 561 states have call predecessors, (12241), 230 states have call successors, (12241) [2023-03-31 22:04:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50516 states to 50516 states and 71383 transitions. [2023-03-31 22:04:16,467 INFO L78 Accepts]: Start accepts. Automaton has 50516 states and 71383 transitions. Word has length 90 [2023-03-31 22:04:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:16,470 INFO L495 AbstractCegarLoop]: Abstraction has 50516 states and 71383 transitions. [2023-03-31 22:04:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 22:04:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 50516 states and 71383 transitions. [2023-03-31 22:04:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-31 22:04:16,482 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:16,483 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:16,507 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 22:04:16,686 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 22:04:16,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:16,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1756337962, now seen corresponding path program 1 times [2023-03-31 22:04:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:16,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965508001] [2023-03-31 22:04:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 78 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 22:04:17,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965508001] [2023-03-31 22:04:17,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965508001] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897994730] [2023-03-31 22:04:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:17,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:17,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:17,256 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 22:04:17,258 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 22:04:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:17,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:04:17,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-31 22:04:17,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:04:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-31 22:04:18,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897994730] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:18,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:04:18,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:04:18,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900396567] [2023-03-31 22:04:18,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:18,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:18,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:04:18,148 INFO L87 Difference]: Start difference. First operand 50516 states and 71383 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 22:04:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:21,909 INFO L93 Difference]: Finished difference Result 121670 states and 176909 transitions. [2023-03-31 22:04:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:04:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 170 [2023-03-31 22:04:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:22,106 INFO L225 Difference]: With dead ends: 121670 [2023-03-31 22:04:22,106 INFO L226 Difference]: Without dead ends: 71544 [2023-03-31 22:04:22,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 332 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 22:04:22,307 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2291 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:22,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 81 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 3531 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 22:04:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71544 states. [2023-03-31 22:04:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71544 to 69749. [2023-03-31 22:04:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69749 states, 68126 states have (on average 1.1745148695065026) internal successors, (80015), 68613 states have internal predecessors, (80015), 318 states have call successors, (318), 318 states have call predecessors, (318), 1304 states have return successors, (17332), 817 states have call predecessors, (17332), 317 states have call successors, (17332) [2023-03-31 22:04:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69749 states to 69749 states and 97665 transitions. [2023-03-31 22:04:23,425 INFO L78 Accepts]: Start accepts. Automaton has 69749 states and 97665 transitions. Word has length 170 [2023-03-31 22:04:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:23,425 INFO L495 AbstractCegarLoop]: Abstraction has 69749 states and 97665 transitions. [2023-03-31 22:04:23,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 22:04:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 69749 states and 97665 transitions. [2023-03-31 22:04:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:04:23,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:23,432 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:23,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:04:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:23,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:23,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash -86780262, now seen corresponding path program 1 times [2023-03-31 22:04:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:23,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940675149] [2023-03-31 22:04:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:04:24,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:24,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940675149] [2023-03-31 22:04:24,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940675149] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:24,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147161805] [2023-03-31 22:04:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:24,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:24,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:04:24,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:04:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:24,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:04:24,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:04:24,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:04:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:04:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147161805] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:04:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313757849] [2023-03-31 22:04:24,766 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2023-03-31 22:04:24,766 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:04:24,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:04:24,772 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:04:24,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:04:24,873 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:04:24,990 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-03-31 22:04:25,206 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-03-31 22:04:25,419 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8409 conjuctions. This might take some time... [2023-03-31 22:04:25,493 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 80 conjuctions. [2023-03-31 22:04:26,445 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:04:26,513 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-03-31 22:04:26,788 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18220 conjuctions. This might take some time... [2023-03-31 22:04:29,179 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 445 conjuctions.