/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:02:08,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:02:08,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:02:08,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:02:08,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:02:08,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:02:08,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:02:08,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:02:08,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:02:08,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:02:08,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:02:08,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:02:08,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:02:08,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:02:08,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:02:08,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:02:08,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:02:08,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:02:08,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:02:08,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:02:08,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:02:08,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:02:08,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:02:08,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:02:08,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:02:08,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:02:08,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:02:08,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:02:08,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:02:08,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:02:08,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:02:08,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:02:08,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:02:08,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:02:08,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:02:08,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:02:08,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:02:08,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:02:08,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:02:08,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:02:08,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:02:08,836 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 22:02:08,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:02:08,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:02:08,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:02:08,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:02:08,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:02:08,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:02:08,863 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:02:08,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:02:08,864 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:02:08,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:02:08,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:02:08,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:02:08,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:02:08,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:02:08,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:02:08,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:02:08,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:02:09,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:02:09,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:02:09,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:02:09,048 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:02:09,048 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:02:09,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2023-03-31 22:02:10,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:02:10,372 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:02:10,373 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2023-03-31 22:02:10,397 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1099a47b/d700926e2283418290c6b23c7e6b58dd/FLAG85d08ce10 [2023-03-31 22:02:10,413 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1099a47b/d700926e2283418290c6b23c7e6b58dd [2023-03-31 22:02:10,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:02:10,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:02:10,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:02:10,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:02:10,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:02:10,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:02:10" (1/1) ... [2023-03-31 22:02:10,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435b475b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:10, skipping insertion in model container [2023-03-31 22:02:10,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:02:10" (1/1) ... [2023-03-31 22:02:10,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:02:10,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:02:10,706 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_label04.c[2611,2624] [2023-03-31 22:02:11,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:02:11,303 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:02:11,321 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_label04.c[2611,2624] [2023-03-31 22:02:11,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:02:11,651 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:02:11,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11 WrapperNode [2023-03-31 22:02:11,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:02:11,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:02:11,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:02:11,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:02:11,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,926 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:11,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:02:11,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:02:11,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:02:11,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:02:11,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (1/1) ... [2023-03-31 22:02:12,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:02:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:12,054 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 22:02:12,061 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 22:02:12,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:02:12,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:02:12,082 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:02:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:02:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:02:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:02:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:02:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:02:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:02:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:02:12,178 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:02:12,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:02:15,760 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:02:17,899 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:02:17,900 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:02:17,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:02:17 BoogieIcfgContainer [2023-03-31 22:02:17,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:02:17,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:02:17,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:02:17,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:02:17,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:02:10" (1/3) ... [2023-03-31 22:02:17,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d53480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:02:17, skipping insertion in model container [2023-03-31 22:02:17,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:11" (2/3) ... [2023-03-31 22:02:17,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d53480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:02:17, skipping insertion in model container [2023-03-31 22:02:17,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:02:17" (3/3) ... [2023-03-31 22:02:17,908 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label04.c [2023-03-31 22:02:17,922 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:02:17,922 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:02:17,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:02:17,988 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;@489cf914, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:02:17,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:02:17,993 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 22:02:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:02:17,998 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:17,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:17,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:18,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -134424043, now seen corresponding path program 1 times [2023-03-31 22:02:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451131285] [2023-03-31 22:02:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:18,280 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 22:02:18,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451131285] [2023-03-31 22:02:18,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451131285] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:02:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041639515] [2023-03-31 22:02:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:18,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:18,317 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 22:02:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:21,269 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:02:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:21,273 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 22:02:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:21,289 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:02:21,289 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:02:21,294 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 22:02:21,296 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:21,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:02:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:02:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-03-31 22:02:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 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 22:02:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-03-31 22:02:21,414 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-03-31 22:02:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:21,414 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-03-31 22:02:21,414 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 22:02:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-03-31 22:02:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:02:21,416 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:21,416 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 22:02:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:02:21,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:21,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1723330250, now seen corresponding path program 1 times [2023-03-31 22:02:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:21,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263422440] [2023-03-31 22:02:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:21,616 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 22:02:21,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263422440] [2023-03-31 22:02:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263422440] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:21,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:21,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:02:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433359410] [2023-03-31 22:02:21,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:21,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:21,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:21,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:21,621 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 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 22:02:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:26,015 INFO L93 Difference]: Finished difference Result 4181 states and 7345 transitions. [2023-03-31 22:02:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:02:26,016 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 22:02:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:26,026 INFO L225 Difference]: With dead ends: 4181 [2023-03-31 22:02:26,026 INFO L226 Difference]: Without dead ends: 2817 [2023-03-31 22:02:26,033 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 22:02:26,035 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2234 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2234 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:26,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2234 Valid, 137 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 22:02:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2023-03-31 22:02:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2751. [2023-03-31 22:02:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-03-31 22:02:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-03-31 22:02:26,127 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-03-31 22:02:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:26,127 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-03-31 22:02:26,127 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 22:02:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-03-31 22:02:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:02:26,129 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:26,129 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] [2023-03-31 22:02:26,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:02:26,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:26,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1378284398, now seen corresponding path program 1 times [2023-03-31 22:02:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:26,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842627377] [2023-03-31 22:02:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:26,296 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 22:02:26,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:26,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842627377] [2023-03-31 22:02:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842627377] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:02:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378111443] [2023-03-31 22:02:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:26,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:26,298 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 22:02:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:30,460 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-03-31 22:02:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:02:30,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-03-31 22:02:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:30,487 INFO L225 Difference]: With dead ends: 8433 [2023-03-31 22:02:30,487 INFO L226 Difference]: Without dead ends: 5687 [2023-03-31 22:02:30,492 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 22:02:30,493 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:30,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-31 22:02:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-03-31 22:02:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-03-31 22:02:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.507070707070707) internal successors, (8206), 5471 states have internal predecessors, (8206), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-03-31 22:02:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8646 transitions. [2023-03-31 22:02:30,594 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8646 transitions. Word has length 41 [2023-03-31 22:02:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:30,594 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8646 transitions. [2023-03-31 22:02:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 22:02:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8646 transitions. [2023-03-31 22:02:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:02:30,601 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:30,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:30,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:02:30,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:30,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash 171390002, now seen corresponding path program 1 times [2023-03-31 22:02:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321306569] [2023-03-31 22:02:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:30,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:02:30,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:30,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321306569] [2023-03-31 22:02:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321306569] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:30,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103116644] [2023-03-31 22:02:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:30,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:30,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:30,772 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 22:02:30,785 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 22:02:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:30,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:02:30,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:02:30,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:30,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103116644] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:30,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:02:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225397190] [2023-03-31 22:02:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:30,960 INFO L87 Difference]: Start difference. First operand 5570 states and 8646 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 22:02:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:34,275 INFO L93 Difference]: Finished difference Result 16768 states and 27168 transitions. [2023-03-31 22:02:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:02:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-03-31 22:02:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:34,317 INFO L225 Difference]: With dead ends: 16768 [2023-03-31 22:02:34,317 INFO L226 Difference]: Without dead ends: 11203 [2023-03-31 22:02:34,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:02:34,337 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:34,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:02:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-03-31 22:02:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9828. [2023-03-31 22:02:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9828 states, 9570 states have (on average 1.3699059561128526) internal successors, (13110), 9636 states have internal predecessors, (13110), 46 states have call successors, (46), 46 states have call predecessors, (46), 211 states have return successors, (1273), 145 states have call predecessors, (1273), 45 states have call successors, (1273) [2023-03-31 22:02:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9828 states to 9828 states and 14429 transitions. [2023-03-31 22:02:34,693 INFO L78 Accepts]: Start accepts. Automaton has 9828 states and 14429 transitions. Word has length 42 [2023-03-31 22:02:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:34,694 INFO L495 AbstractCegarLoop]: Abstraction has 9828 states and 14429 transitions. [2023-03-31 22:02:34,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 22:02:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9828 states and 14429 transitions. [2023-03-31 22:02:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:02:34,695 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:34,695 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 22:02:34,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:02:34,899 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 22:02:34,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:34,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1744097147, now seen corresponding path program 1 times [2023-03-31 22:02:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211861135] [2023-03-31 22:02:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:34,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:35,078 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 22:02:35,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:35,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211861135] [2023-03-31 22:02:35,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211861135] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288863912] [2023-03-31 22:02:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:35,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:35,083 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 22:02:35,127 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 22:02:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:35,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:02:35,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:35,238 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 22:02:35,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288863912] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:35,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:02:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119082257] [2023-03-31 22:02:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:35,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:35,239 INFO L87 Difference]: Start difference. First operand 9828 states and 14429 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 22:02:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:39,241 INFO L93 Difference]: Finished difference Result 24770 states and 37331 transitions. [2023-03-31 22:02:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:02:39,241 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 22:02:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:39,297 INFO L225 Difference]: With dead ends: 24770 [2023-03-31 22:02:39,297 INFO L226 Difference]: Without dead ends: 14947 [2023-03-31 22:02:39,319 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 22:02:39,321 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2097 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:39,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 96 Invalid, 5157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 22:02:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14947 states. [2023-03-31 22:02:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14947 to 14596. [2023-03-31 22:02:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14596 states, 14151 states have (on average 1.281746873012508) internal successors, (18138), 14277 states have internal predecessors, (18138), 67 states have call successors, (67), 67 states have call predecessors, (67), 377 states have return successors, (2680), 251 states have call predecessors, (2680), 66 states have call successors, (2680) [2023-03-31 22:02:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14596 states to 14596 states and 20885 transitions. [2023-03-31 22:02:39,749 INFO L78 Accepts]: Start accepts. Automaton has 14596 states and 20885 transitions. Word has length 45 [2023-03-31 22:02:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:39,752 INFO L495 AbstractCegarLoop]: Abstraction has 14596 states and 20885 transitions. [2023-03-31 22:02:39,753 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 22:02:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 14596 states and 20885 transitions. [2023-03-31 22:02:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:02:39,755 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:39,755 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 22:02:39,761 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 22:02:39,961 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 22:02:39,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:39,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash 45169932, now seen corresponding path program 1 times [2023-03-31 22:02:39,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:39,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263154070] [2023-03-31 22:02:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:40,185 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 22:02:40,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:40,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263154070] [2023-03-31 22:02:40,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263154070] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:40,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:40,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:02:40,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398906391] [2023-03-31 22:02:40,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:40,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:40,186 INFO L87 Difference]: Start difference. First operand 14596 states and 20885 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 22:02:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:43,388 INFO L93 Difference]: Finished difference Result 41901 states and 61916 transitions. [2023-03-31 22:02:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:43,389 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 22:02:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:43,475 INFO L225 Difference]: With dead ends: 41901 [2023-03-31 22:02:43,476 INFO L226 Difference]: Without dead ends: 27310 [2023-03-31 22:02:43,509 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 22:02:43,510 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 717 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:43,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 396 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:02:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27310 states. [2023-03-31 22:02:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27310 to 26311. [2023-03-31 22:02:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26311 states, 25671 states have (on average 1.26625374936699) internal successors, (32506), 25841 states have internal predecessors, (32506), 121 states have call successors, (121), 121 states have call predecessors, (121), 518 states have return successors, (5672), 348 states have call predecessors, (5672), 120 states have call successors, (5672) [2023-03-31 22:02:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26311 states to 26311 states and 38299 transitions. [2023-03-31 22:02:44,088 INFO L78 Accepts]: Start accepts. Automaton has 26311 states and 38299 transitions. Word has length 79 [2023-03-31 22:02:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:44,089 INFO L495 AbstractCegarLoop]: Abstraction has 26311 states and 38299 transitions. [2023-03-31 22:02:44,089 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 22:02:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26311 states and 38299 transitions. [2023-03-31 22:02:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-31 22:02:44,093 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:44,093 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-03-31 22:02:44,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:02:44,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:44,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:44,094 INFO L85 PathProgramCache]: Analyzing trace with hash 355638665, now seen corresponding path program 1 times [2023-03-31 22:02:44,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:44,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897550359] [2023-03-31 22:02:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:44,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:02:44,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897550359] [2023-03-31 22:02:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897550359] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071603915] [2023-03-31 22:02:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:44,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:44,280 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 22:02:44,283 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 22:02:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:44,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:02:44,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:02:44,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:02:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:02:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071603915] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:02:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885480426] [2023-03-31 22:02:44,665 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-03-31 22:02:44,665 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:02:44,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:02:44,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:02:44,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:02:44,767 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:02:44,825 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-03-31 22:02:44,928 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2023-03-31 22:02:45,115 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7628 conjuctions. This might take some time... [2023-03-31 22:02:45,193 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32 conjuctions. [2023-03-31 22:02:46,217 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:02:46,263 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11